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Skip Navigation LinksAll Horse Topics > Infectious Diseases > West Nile Virus (WNV)


Articles ( * = TheHorse.com members only )Date Posted
Seventh Kentucky West Nile Virus Case Confirmed  *
The Kentucky State Veterinarian's office today noted that a seventh 2009 case of West Nile virus (WNV) has been confirmed. An 18-month-old Quarter horse filly in ballard County had an onset of clinical signs of ataxia, lethargy, and inappetence on Oct. 5. By Oct. 15 she was much improved. She had not been vaccinated against West Nile virus. Of the ... Read full story
 10/15/2009
Kentucky West Nile Virus Update: Sixth Case Confirmed  *
This morning (Oct. 10), the Kentucky State Veterinarian's office sent out an alert that the sixth equine case of West Nile virus had been confirmed. The University of Kentucky's Livestock Disease Diagnostic Center confirmed the diagnosis in a 17-month-old Tennessee Walking Horse based on positive Igm and compatible clinical signs. The horse had no ... Read full story
 10/10/2009
West Nile Virus Returns to Italy  *
West Nile virus (WNV) has re-emerged in Italy, resulting in 28 equine clinical cases, including seven deaths as of last week, according to an epidemiological bulletin produced by the Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise "Giuseppe Caporale" (IZSA&M), an Italian public health institute. The epidemic began in central eastern ... Read full story
 10/3/2009
EEE and West Nile Virus Cases Continue to Climb  *
A total of 203 cases of Eastern equine encephalitis (EEE) has been reported in the United States this year according to the USDA's National Animal Health Surveillance System as of Sept. 12. West Nile virus (WNV) cases continue to climb slowly, now standing at 75. As of our last report on Sept. 3, there were 193 cases of EEE and 64 cases of WNV reported ... Read full story
 9/12/2009
Mosquito-Borne Horse Diseases Update  *
Many equine health professionals are worried that because of the economic recession that's lasted more than a year, many horses are either not vaccinated or are under-vaccinated to protect them agasint common diseases. According to the USDA, as of Sept. 3, there have been 193 cases of Eastern equine encephalitis (EEE) and 64 cases of West Nile virus ... Read full story
 9/6/2009
Virginia Logs First Equine WNV Case for 2009  *
The Virginia Department of Agriculture and Consumer Services (VDACS) has confirmed and announced Virginia's first positive case of West Nile virus (WNV) in a horse for 2009. The 16-year-old Tennessee Walking Horse mare was from Pittsylvania County. Onset of clinical signs was Aug. 17 and necropsy at VDACS' Regional Animal Health Laboratory in Lynchburg ... Read full story
 9/5/2009
Mosquito-Borne Equine Diseases Prevalent on Both Coasts  *
As of Aug. 25, Florida led the United States in the number of documented equine cases of Eastern equine encephalitis (EEE), a mosquito-borne disease with mortality rates of around 90% in horses. Washington state officials had confirmed the most equine cases of West Nile virus (WNV) this year. Thus far in 2009 cases of EEE are largely clustered in ... Read full story
 9/3/2009
West Nile Virus: Washington Reports Highest Number of Cases   *
West Nile virus cases are popping up across the country, with Washington state reporting the highest number of equine cases. As of Aug. 19, Washington animal health authorities had reported 12 equine cases. Other states reporting cases included Montana (4), California (3), Kentucky (2), and Louisiana (2). Mississippi, Texas, Utah, and West Virginia ... Read full story
 8/24/2009
Japanese Encephalitis Vaccine Might Offer Some WNV Protection  *
Vaccination against Japanese encephalitis might mitigate West Nile virus (WNV) infection in some horses, said a group of researchers from Japan's National Institute of Animal Health in a recent paper. Outbreaks of WNV have been reported in many countries, including the United States, but it has not yet been detected in most Asian countries. However, ... Read full story
 8/18/2009
West Nile Virus: 35 States Active, First Reported 2009 Horse Death in California  *
When West Nile virus (WNV) made its march from East Coast to West Coast starting in late 1999, California was one of the last states to be struck by the disease. In the past couple of years, California has one of the the highest rates of West Nile virus problems in the country, and it now has recorded its first horse death for 2009 due to the disease, ... Read full story
 8/7/2009
West Nile Virus-Positive Mosquito Pool in 2009 Confirmed in Maryland  *
The Maryland Department of Agriculture (MDA) announces the first state detection of a West Nile virus (WNV) mosquito pool in Maryland in 2009. State Department of Health and Mental Hygiene (DHMH) laboratory results confirmed the presence of WNV in mosquitoes (Culex pipiens) collected on July 21 in the Pocomoke City, Worcester County. MDA mosquito control ... Read full story
 8/6/2009
First 2009 Equine West Nile Virus Case Confirmed in Kentucky   *
Laboratory results received Tuesday (Aug. 4) from Murray State University's Breathitt Veterinary Center confirms the diagnosis of West Nile virus (WNV) having affected a yearling colt in Caldwell County, Kentucky. This is according to the Kentucky State Veterinarian's office. The yearling Quarter Horse colt is reported by the veterinarian as much ... Read full story
 8/5/2009
Free West Nile Virus Webinar Tonight, Sign Up Now   *
It's been 10 years since West Nile virus was introduced into the United States, and thousands of horses across North America have been ill or died due to this disease. Find out how to protect your horses! Our next free Webinar, "West Nile Virus: Reality Check!" will take place tonight at 8 p.m. ET. This Webinar is sponsored Intervet/Schering-Plough ... Read full story
 7/30/2009
Poll: West Nile Virus Vaccine Choices  *
Almost 480 readers of TheHorse.com responded to a poll asking, "Do you know which WNV vaccine your veterinarian uses on your horse(s)?" Results were as follows: Yes 52.72% (252) No 47.28% (226) Readers shared what their veterinarian uses on their horses in the comments below. Poll sponsored by Intervet/Schering-Plough Animal ... Read full story
 7/11/2009
Poll: Mosquito Control Measures  *
About 980 readers of TheHorse.com responded to a poll asking, "What mosquito control measures do you utilize?" Results were as follows: Insect repellants 78.27% (767) Regular cleaning of water troughs 72.76% (713) Eliminate unnecessary standing water 66.33% (650) Regular manure removal 58.78% (576) Fly masks/sheets 52.55% (515) ... Read full story
 7/2/2009
West Nile Virus is Still a Threat, TheHorse.com Readers Say  *
More than 890 readers of TheHorse.com responded to a poll asking, "Do you believe West Nile is still a threat to your horse(s)?" Results were as follows: Yes 86.50% (775) No 13.50% (121) Readers shared why they feel West Nile is or is not a big threat in the comments below. Results of weekly polls from TheHorse.com are published ... Read full story
 6/28/2009
Foal Immune Responses after WNV Vaccination, AAEP 2008   *
A study conducted by personnel at the University of Kentucky and other institutions was aimed at determining an appropriate time for vaccinating foals for West Nile virus (WNV), reported David Horohov, PhD, at the 2008 American Association of Equine Practitioners Convention, which was held Dec. 6-10 in San Diego, Calif. Among basic questions to be ... Read full story
 6/21/2009
Poll: Majority of TheHorse.com Readers Vaccinate Against WNV  *
More than 1,270 readers of TheHorse.com responded to a poll asking, "Do you vaccinate for West Nile virus annually?" Results were as follows: Yes 88.10% (1,125) No 11.90% (152) Readers shared their reasoning in the comments below. Poll sponsored by Intervet/Schering-Plough Animal Health Results of weekly polls from TheHorse.com ... Read full story
 6/19/2009
Readers Share Top Two Vaccination Choices  *
Approximately 1,270 readers of TheHorse.com responded to a poll asking, "Which two vaccinations do you feel are most important?" Results were as follows: West Nile virus (WNV) 58.27% (740) Rabies 52.83% (671) Sleeping sickness (EE, WEE, VEE) 49.61% (630) Influenza 24.88% (316) Equine herpes virus (EHV) 8.35% (106) Potomac ... Read full story
 6/12/2009
WNV Reality Check! Webinar on TheHorse.com   *
Do you think West Nile virus (WNV) has run its course in the United States? Then you need to watch the "WNV Reality Check!" on TheHorse.com on Thursday, July 30, at 8 p.m., sponsored by Intervet/Schering-Plough Animal Health. You can sign up now! According to the Centers for Disease Control, last year there were 687 human cases of West Nile virus ... Read full story
 6/9/2009
Building Immunity  *
The foal’s immune system is almost a blank slate at birth; researchers are figuring out how to best protect horses as they grow. The process of building immunity against disease-causing pathogens for a horse begins with a foal's first sip of colostrum after birth. Foals are born without much protection against the world outside the uterus. The mare's ... Read full story
 5/1/2009
Washington State Vet Urges WNV Vaccination  *
Horse owners in Washington should take advantage of the vaccines available to prevent West Nile virus, particularly as the state led the nation last year in the number of horses testing positive for the disease. West Nile virus (WNV) is spread by mosquitoes that have fed on an infected bird. It is not spread from horses to other animals. A total ... Read full story
 4/22/2009
Vaccination Yearly Planner  *
Immunizations are the cornerstone of disease prevention if given appropriately and in a timely manner. One of the brightest spots of equine medical care for horses is the availability of many safe and effective vaccines to protect horses from infectious and noninfectious diseases. Sometimes it is confusing as to which ones your horse might need. Let's ... Read full story
 1/1/2009
West Nile Virus DNA Vaccine for Horses Introduced   *
West Nile-Innovator DNA, a vaccine for horses to aid in the prevention of viremia caused by the potentially deadly West Nile virus, was launched by Fort Dodge Animal Health, a division of Wyeth, Dec. 4. Developed in collaboration with the U.S. Centers for Disease Control and Prevention (CDC), this represents a tremendous milestone in DNA science and ... Read full story
 12/5/2008
Disease Control Yearly Planner  *
Guard against diseases on your farm year-round by employing these seasonal tips For a horse to perform to his utmost capacity, he must be healthy and sound throughout the year. The smallest details of farm management often have the greatest impact on a horse’s general wellness, and such strategies provide a critical template for minimizing the risk ... Read full story
 11/26/2008
University of Florida Veterinarian Troubleshoots West Nile Virus   *
In 2001, University of Florida veterinarian Maureen Long, DVM, PhD, Dipl. ACVIM, became an authority on West Nile virus by accident. That year, Long and other UF Large Animal Medicine clinicians saw some of the first Florida horses breaking with the mosquito-borne disease. Prior to its arrival in Florida, there had been fewer than 100 cases of the ... Read full story
 11/10/2008
Eastern Equine Encephalomyelitis Cases Reported In Mississippi  *
This week the Mississippi State Department of Health reported three new cases of Eastern equine encephalomyelitis (EEE), a mosquito-borne virus, bringing the state's total to eight for the year. Three cases of West Nile virus (WNV) have also been confirmed in Mississippi horses this year, according to the state's Web site. The state’s health department ... Read full story
 10/26/2008
Kentucky Reports Fourth WNV Case of 2008 Season   *
A fourth horse in Kentucky has tested positive for West Nile virus (WNV). According to a notification released by the state veterinarian's office, the 7-year-old Tennessee Walking Horse had been partially vaccinated against the disease. It had received a single shot on Aug. 28. The horse started showing clinical signs Sept. 30. As of Oct. 15, it ... Read full story
 10/17/2008
Two Texas Horses Positive for EEE  *
Texas has joined at least five other states this year in reporting cases of Eastern equine encephalitis infection in horses. In Houston County, in the southeast corner of the state, a horse with clinical illness has tested positive for the disease, and in Denton County, north central Texas, a vaccinated horse also tested positive and exhibited clinical ... Read full story
 10/10/2008
Washington Horse Owners Beware: West Nile Virus Lurking  *
The Washington state Department of Health reported two additonal horses have tested positive for West Nile virus. There also have been additional dead birds in Lewis and Pierce Counties that tested positive. Earlier this year West Nile virus-positive dead birds were reported in King, Benton, and Thurston Counties. ... Read full story
 10/5/2008
Kentucky Reports Second Equine West Nile Virus Case  *
A second Kentucky horse has been confirmed as positive for West Nile virus, animal health officials announced. The affected animal is a 17-month-old Tennessee Walking Horse from Adair County, in the south-central portion of the state. This horse was not vaccinated. It was alive and showing improvement at the time of the Oct. 1 report. The first ... Read full story
 10/1/2008
Third Kentucky Horse has West Nile Virus  *
A third horse in Kentucky has been confirmed positive for West Nile virus. Two other cases have been reported thus far this year, with the second reported just hours before the third. The cases all occurred within different counties. The third affected animal is a 7-year-old Quarter Horse in Pendleton County, which is in the north-central area of ... Read full story
 10/1/2008
Number of Human West Nile Virus Cases Lowest in Years  *
The West Nile virus season is on track to be the mildest in seven years, with less than a third the number of serious human cases as last year's total, U.S. health officials said. As of Tuesday, there were 368 severe human cases, with 18 deaths, according to preliminary reports. Mississippi and California were hardest hit, together accounting for ... Read full story
 9/30/2008
Kentucky Reports First Equine West Nile Virus Case of 2008  *
Kentucky agriculture officials announced today that a 9-year-old Saddlebred gelding has been confirmed positive for West Nile virus (WNV). This is the first WNV case in the state so far this year. The affected horse lives in Christian County, in the southwest portion of the state. According to the statement released by the Kentucky State Veterinarian's ... Read full story
 9/18/2008
Tennessee Officials Urge Horse Owners to Protect Against EEE  *
The Tennessee Departments of Agriculture and Health this month urged horse owners to protect their horses from mosquitoes and to review vaccination records for Eastern equine encephalitis (EEE) and other mosquito-borne diseases including West Nile Virus (WNV). "Outbreaks of viral encephalitis in horses are a seasonal occurrence due to the prevalence ... Read full story
 8/30/2008
Wisconsin Horses Positive for EEE, WNV  *
A horse in Dodge County, Wisc., has died from Eastern equine encephalomyelitis (EEE), a mosquito-borne disease that is easily prevented by vaccination. A yearling Quarter Horse died from EEE in Juneau July 28, one day after it showed neurologic signs consistent with the virus. The horse had not been vaccinated against the disease and the diagnosis ... Read full story
 8/12/2008
WNV Reported in Washington Horses   *
West Nile virus (WNV), a potentially fatal disease in equines, has been confirmed in two horses, one in Moses Lake and the other in the Toppenish area, according to a statement released by the Washington State Department of Agriculture (WSDA). These are the first confirmed cases this year of horses contracting West Nile virus in Washington. Last ... Read full story
 8/5/2008
West Nile Incidence and Vaccination, 1999-2007   *
West Nile virus (WNV), an arbovirus endemic in North America, is the causative agent of West Nile equine encephalomyelitis (WNEE) and an important consideration in the differential diagnosis of horses with signs of neurologic disease. West Nile virus vaccination is important in the prevention of WNEE and is considered one of the core equine vaccinations ... Read full story
 7/27/2008
New Mexico Horse Tests Positive for West Nile Virus  *
A horse from McKinley County, N.M., has tested positive for West Nile virus, the first positive test for the virus in a horse this year. That word from the state health department. New Mexico has reported no human cases of West Nile virus this year. The state public health veterinarian for the Department of Health, Dr. Paul Ettestad, says the positive ... Read full story
 7/20/2008
Iowa State University Vets: Protect Horses from WNV  *
The time to protect horses from West Nile virus (WNV) is now, said David Wong, DVM, MS, Dipl. ACVIM, assistant professor of equine medicine at Iowa State University's Veterinary Medical Center. "The peak of West Nile season is August and September," said Wong. "Horse owners should have their animals vaccinated now to protect them against the virus." West ... Read full story
 7/7/2008
First California Equine WNV Case of 2008 Reported   *
The first positive equine case of West Nile virus in California in 2008 has been reported in Riverside County. The affected horse, a 15-year-old Quarter Horse gelding, died. West Nile virus (WNV) is a mosquito-borne virus that was first detected in the United States in 1999 in the New York City area. It can cause a wide range of clinical illnesses ... Read full story
 6/24/2008
South Dakota Horse Owners Reminded to Vaccinate Against WNV  *
Although the number of cases of WNV in South Dakota's horses has gone down significantly in recent years, this decline can be largely attributed to the success of the vaccine, according to South Dakota State University Extension Veterinarian Russ Daly, DVM. The mosquito-transmitted disease is still a threat in South Dakota, and non-vaccinated horses ... Read full story
 5/22/2008
Vaccination Guidelines  *
Spring means vaccination time. In 2008, the American Association of Equine Practitioners (AAEP) Infectious Disease Committee released a revised online version of their "Guidelines for the Vaccination of Horses." Developing a vaccination schedule is not as straightforward as it sounds. So much of what you should vaccinate for depends upon such factors ... Read full story
 4/21/2008
West Nile Virus 'Hot Spots' Identified in Texas  *
In a recently published study Texas A&M University veterinarians identified two "hot spots" of West Nile virus (WNV) based on data they collected between 2002 and 2004. One of these spots is in northwestern Texas and the other in an eastern region of the state. Mapping areas in which WNV is concentrated enables veterinarians to institute disease ... Read full story
 4/10/2008
Florida Official Urges EEE Vaccination; 9 Deaths Reported  *
Florida horse owners are being urged to take advantage of the vaccines available to protect their animals against Eastern equine encephalitis (EEE) and West Nile virus, said Florida Agriculture and Consumer Services Commissioner Charles H. Bronson. As the weather in Florida warms up, the mosquito populations will increase as will the potential for ... Read full story
 3/21/2008
Dealing with Emerging Infectious Diseases  *
Scientists are becoming increasingly concerned about the marked and persistent development of emerging infectious diseases--infections that are new to a population or geographic area, have appeared more frequently, or have become more virulent (able to cause disease). Within the past two decades, the list of emerging infectious diseases and pathogens ... Read full story
 3/5/2008
Antibodies to WNV Common in Arab Emirate Horses  *
Researchers found antibodies to West Nile virus (WNV) in nearly 20% of horses recently tested in the United Arab Emirates (UAE), according to Ulrich Wernery, DVM, PhD, scientific director of the Central Veterinary Research Laboratory in Dubai and author of the Dubai-based study published in Wildlife Middle East. The testing was initiated after one ... Read full story
 1/18/2008
Study: Light-Colored Horses at Higher Risk of Dying from West Nile Virus  *
Researchers at the Western College of Veterinary Medicine in Saskatchewan, Canada, recently published a study indicating that light-colored horses diagnosed with West Nile virus (WNV) might be more likely to succumb to the disease than their darker counterparts. Horses included in the study were divided into three groups based on coat color: dark ... Read full story
 1/3/2008
New Variables Identified as West Nile Risk Factors  *
Based on a recent retrospective study performed at the Western College of Veterinary Medicine in Saskatchewan, Canada, three major risk factors that are completely outside of a horse owner's control contribute to the mortality rate of West Nile virus disease in horses: sex, time of infection, and coat color. West Nile virus is transmitted to horses ... Read full story
 12/22/2007
Two New West Nile Virus Cases in Kentucky  *
The Kentucky state veterinarian's office reported today (Oct. 30) that the fourth and fifth cases of West Nile virus have been identified in the state. Four of the five cases this year have survived and one was euthanatized. None of the affected horses was vaccinated. The most recent cases were an 8-year-old Quarter Horse mare in Daviess County and ... Read full story
 10/30/2007
Mississippi State Reports Surge in EEE, WNV Cases   *
Eastern equine encephalitis (EEE) and West Nile virus (WNV) have hit Mississippi's horses hard this year, with EEE case numbers surging to more than double 2006 levels. According to State Veterinarian Jim Watson, DVM, there have been 27 cases of EEE and 11 of WNV thus far. Watson said there's no clear reason why the incidence of the mosquito-borne ... Read full story
 10/15/2007
West Nile Virus Presentation Available on TheHorse.com   *
A free web-based seminar ("Webinar") on West Nile virus hosted by The Horse on Oct. 2, 2007 is now archived and available in TheHorse'com's Video Library. Nearly 1,400 people registered for the presentation, which included streamed video, audio, and a slide presentation featuring Debra C. Sellon DVM, PhD, Dipl. ACVIM, a professor of Equine Medicine ... Read full story
 10/3/2007
Wisconsin Horse Positive for West Nile Virus  *
A Racine County, Wisconson, horse has tested positive for West Nile virus. The Caledonia and Mount Pleasant Health Department says it's the first documented case this year of the mosquito-borne disease in Racine County. Health officer Margaret Gesner says the 5-year-old Welsh pony was euthanized Sept. 16. In order to help horse owners better understand ... Read full story
 9/29/2007
Webinar: Understanding West Nile Virus
Since West Nile virus emerged in the United States in 1999, more than 24,671 horses have been infected. Fall is when horse owners and veterinarians most often see this deadly virus emerge. To help horse owners better understand this disease, host TheHorse.com and sponsor Intervet presented the on-demand educational webinar "Understanding West Nile ... Read full story
 9/25/2007
WNV: Montana, California Leading Country in Equine Cases   *
As of September 11, Montana and California had reported the highest number of equine West Nile virus (WNV) cases so far this year with 24 and 19, respectively. The USDA's Animal and Plant Health Inspection Service tracks equine arboviruses through the National Animal Health Surveillance System (NAHSS). Other states reporting numerous cases included: ... Read full story
 9/19/2007
Equine West Nile Virus Case Reported in Kentucky  *
A 10-year-old Quarter Horse gelding is Kentucky’s first West Nile virus (WNV) case of 2007, according to Rusty Ford, Equine Programs manager with the Kentucky State Veterinarian's office. The horse is from Mason County. He was not vaccinated, but was reported alive and improving as of Sept. 14. There were 18 confirmed equine cases of WNV on 17 ... Read full story
 9/15/2007
UC Davis: Gene Mutation Turned WNV into Killer Disease among Crows  *
A gene mutation that appears to be responsible for changing relatively mild forms of the West Nile virus into a highly virulent and deadly disease in American crows has been identified by a team of scientists led by a researcher at the University of California, Davis. Because it is highly susceptible to West Nile virus, the American crow has served ... Read full story
 8/21/2007
WNV, EEE Found in Massachusetts Mosquitoes  *
The Massachusetts Department of Public Health (MPH) announced Aug. 10 that Eastern equine encephalitis (EEE) virus and West Nile virus (WNV) have been detected in mosquitoes in Bristol, Norfolk, and Suffolk counties. According to the MPH statement, there have been five positive mosquito samples for EEE so far this year, compared with 50 positive ... Read full story
 8/10/2007
California Declares WNV Emergency in Three Counties   *
Gov. Arnold Schwarzenegger declared a state of emergency Thursday in three California counties hit hard by the mosquito-borne West Nile virus, which has killed four people this year and appears to be spreading at a rapid clip. The emergency declaration applies to Kern, Colusa, and San Joaquin counties, and will provide up to $1.35 million to help ... Read full story
 8/3/2007
Oklahoma Horse Owners Urged to Vaccinate Animals Against WNV  *
Oklahoma state veterinarians are encouraging horse owners to have their animals vaccinated against the potentially deadly West Nile virus. The virus is carried by mosquitoes and officials say because of the rainy summer mosquitoes are prevalent and the virus season is likely to extend into October. Assistant state veterinarian Michael Herrin, DVM, ... Read full story
 7/28/2007
Two Montana Horses Contract WNV  *
Montana's acting state veterinarian says West Nile virus has been confirmed in horses in Blaine and Phillips counties. Jeanne Rankin says neither of the two horses was vaccinated against the disease; and both are still alive. The virus is spread through the bite of an infected mosquito, which became infected by feeding on infected birds. Mosquitoes ... Read full story
 7/28/2007
CDC: Human West Nile Virus Cases Off to a Fast Start   *
The nation is on pace to have its worst West Nile virus (WNV) season in years, federal health officials said Thursday (July 26). "If this trend continues like this, it's going to be a very high," said Dr. Lyle Petersen of the U.S. Centers for Disease Control and Prevention. At least 177 people died from West Nile virus in 2006 out of 4,269 cases; ... Read full story
 7/27/2007
Equine Cases of EEE and WNV Confirmed in Virginia  *
Virginia's state veterinarian confirmed on Wednesday (July 24) the first cases of Eastern equine encephalitis (EEE) and West Nile virus (WNV) in horses this year. The EEE-positive horse was from Suffolk and was euthanatized because of its illness on June 26. The WNV-positive horse is from Rockingham County, and developed clinical signs on June 23. ... Read full story
 7/26/2007
Texas: Water Everywhere Raises Risk of Livestock Disease  *
Rushing water, stagnant ponds, or even sudden dry stages after wet periods can lead to outbreaks of livestock disease. Mosquitoes and biting flies, capable of carrying and transmitting diseases, thrive in the damp weather. Prolonged wet periods can also bring anthrax spores to the surface, making them a threat to livestock and wildlife after pastures ... Read full story
 7/16/2007
Flooded Plains States: Drying Out, Bracing for Mosquito-Borne Equine Diseases   *
The waters might be receding, but horse owners in Kansas, Oklahoma, Texas, and other areas affected by recent flooding shouldn't drop their guard against flood-related problems just yet. Veterinary authorities say owners in the soggy states should prepare for a potential surge in cases of mosquito-borne equine diseases, such as Eastern and Western ... Read full story
 7/12/2007
West Nile Virus Found in New Mexico Horse   *
A horse in Lea County, N.M., has been confirmed with the West Nile virus, a mosquito-borne illness that also can strike humans. It was the first case in a horse in New Mexico this year, the state Department of Health said. There have been no human cases this year. The yearling filly was brought in late last month, so weak it could no longer stand, ... Read full story
 7/4/2007
West Nile Virus Showing Up Across the Country  *
With some areas of the country having excess rainfall, and many parts moving into prime West Nile virus season, many government officials are warning humans to take precautions against the deadly disease. West Nile virus cases in humans have been reported already this season in Colorado, North Dakota, California, Iowa, Mississippi, and South Dakota. ... Read full story
 7/1/2007
Researchers Test WNV Vaccines  *
In a recent study, University of Florida researchers evaluated the effectiveness of three commercially available equine West Nile virus (WNV) vaccines. While all vaccinated horses, irrespective of the vaccine administered, did not develop viremia and all survived a severe challenge model of WNV-induced encephalomyelitis (in this case, WNV was introduced ... Read full story
 6/30/2007
West Nile Virus Detected in Idaho  *
West Nile virus (WNV) has been found in mosquitoes in southwest Idaho, the Idaho Department of Health and Welfare reported. Mosquitoes in Gem County tested positive for the virus June 8. It is the first time this year the virus has been detected in Idaho. Last year, the virus was found in 38 Idaho counties, infecting about 1,000 people and leading ... Read full story
 6/16/2007
WNV: Pennsylvania Reports First Positive Mosquito of 2007  *
Pennsylvania state officials reported June 12 that the first mosquito sample positive for the West Nile virus in the state this year has been found in Blair Township, Blair County. "As with people, animals become infected with the West Nile virus only after being bitten by an infected mosquito," Agriculture Secretary Dennis Wolff said. "Horses are ... Read full story
 6/12/2007
West Nile Virus Appearing in Washington Horses   *
In 2002, Washington confirmed its first two equine cases of West Nile virus (WNV) in Pierce and Thurston counties. The disease was not seen again until 2005, when one positive horse was found in Yakima County. In 2006, six cases were confirmed, the first during August in a horse from Yakima County. By the year's end, four others were diagnosed from ... Read full story
 6/8/2007
WNV: Some East Coast Bird Populations Wiped Out   *
Birds that once flourished in suburban skies, including robins, bluebirds and crows, have been devastated by West Nile virus, a new study has found. Populations of seven species have suffered dramatic declines across the continent since West Nile first emerged in the United States in 1999, according to a first-of-its-kind study. The research, published ... Read full story
 5/31/2007
WNV: Oregon Braces for Surge in Cases  *
Based on the pattern of the disease's spread, Oregon might see a sharp increase in the humans who get West Nile virus in 2007, health officials say. When the virus crosses state boundaries, officials said, it typically results in a few cases the first year, followed by a surge a year or two later. Four of Oregon's first six human cases were in ... Read full story
 5/19/2007
WNV: Illinois Horse Owners Advised to Vaccinate Animals  *
The Illinois Department of Agriculture released a statement last week reminding horse owners to vaccinate their animals before the onset of mosquito season to protect against West Nile virus (WNV). "Many horses infected with WNV never develop the illness, but it can be very serious--even fatal--if they are not protected," Colleen O'Keefe, DVM, IDOA ... Read full story
 5/14/2007
Wet Spring in Kansas Raises Concerns About Mosquito Numbers  *
Health authorities hope Kansas' wet weather this spring doesn't translate into a surge in mosquito numbers. "It's going to depend on temperature, how long the water stays on the ground, things like that," said Ludek Zurek, an assistant professor of entomology at Kansas State University. "If it's standing water, there is a chance there might be an ... Read full story
 5/12/2007
West Nile Virus: Delaware Residents Asked to Report Dead Birds to State   *
The Delaware Department of Natural Resources and Environmental Control's Mosquito Control Section is again asking for the public's help in monitoring West Nile virus (WNV) by reporting sick or dead wild birds that might have contracted the virus. West Nile virus is a mosquito-borne disease of considerable concern to human health and unvaccinated horses. ... Read full story
 4/23/2007
West Nile Virus Continues to be a Threat  *
With spring here and temperatures on the rise throughout the country, growing mosquito populations increase the risk for mosquito-borne diseases, including West Nile virus and equine encephalomyelitis (sleeping sickness). To protect their horses from these diseases, owners are encouraged to vaccinate as part of a comprehensive prevention program. Unseasonably ... Read full story
 4/5/2007
AAEP Convention 2006: Medicine  *
Uplifting Applications for UC Davis Large Animal Lift John Madigan, DVM, MS, Dipl. ACVIM, professor of medicine and epidemiology and section chief of equine medicine at the University of California, Davis, developed the UC Davis Large Animal Lift (LAL) with colleagues over the last several years. He reported on the lift's applications and success ... Read full story
 3/1/2007
NAHMS: Most Commonly Used Equine Vaccine Type in U.S. is West Nile Virus  *
Equine operation managers surveyed for the National Animal Health Monitoring System's (NAHMS) Equine 2005 study report that West Nile virus (WNV) vaccines are the most common vaccine administered to horses at their facilities. More than 85% of operation managers reported giving vaccines against WNV. Of the farms that did not vaccinate against WNV, ... Read full story
 12/3/2006
West Nile Virus Detected in France  *
French veterinary officials have reported the confirmation of the country's first equine West Nile virus (WNV) case in two years. The case was detected in Pyrenees-Orientales (southern France) on a farm located at Argeles-sur-mer. There were 15 susceptible horses on the farm, but only one horse developed illness. The horse is recovering, and it is ... Read full story
 10/11/2006
Kentucky's WNV Case Count Rises to 15  *
The Office of the State Veterinarian in Kentucky reported an additional equine case of West Nile virus (WNV) today. This brings the total for 2006 to 15 cases. The 3-year-old Quarter Horse gelding in Webster County began showing signs of WNV on Sept. 21 and remains alive. He had no history of WNV vaccination. The diagnosis was based on both the ... Read full story
 10/2/2006
Idaho Leads Nation in Equine WNV Cases  *
As West Nile virus (WNV) continues to appear across the United States this mosquito season, Idaho horses are being hit hard. More than 300 horses have been diagnosed with the illness in 2006. Marilyn Simunich, DVM, of the Idaho Animal Health Laboratory, has been gathering histories on the infected horses. "We call the vet offices and ask if the ... Read full story
 9/29/2006
British Columbia's First Equine WNV Case Likely Imported  *
A Canadian news service reports that British Columbia health authorities have recorded the detection of the province's first animal case of West Nile virus—a horse. However, the horse likely contracted the illness during a recent visit to Colorado. Northern Interior Medical Health Officer Lorna Medd, MD, told cbc.com the horse was recovering. Twenty ... Read full story
 9/25/2006
West Nile Virus Cases in Horses Continue to Climb  *
According to the most recent figures from the U.S. Geological Survey, more than 670 cases of West Nile Virus disease in horses have been reported this year.1 As the number of cases continues to grow, states west of the Mississippi River--including California, Idaho, Missouri and Utah--have been especially hard hit, accounting for about 80% of the total ... Read full story
 9/25/2006
Kentucky's 14th WNV Case Confirmed  *
The Kentucky State Veterinarian's office announced today (Sept. 20) the 14th confirmed case of West Nile virus (WNV) in the state. Rusty Ford, Equine Programs Manager, said an 8-year-old Thoroughbred filly was euthanatized in Lincoln County. Onset of her clinical signs was Sept. 9, and she had no history of vaccination. Ford said historically, Kentucky ... Read full story
 9/20/2006
WNV-Infected Horses Not a Predictor for Humans  *
A Canadian study concluded that horses infected with West Nile virus (WNV) were not a reliable indicator for future human infections. The study was published in the June issue of Preventive Veterinary Medicine. Researchers at the University of Saskatchewan reviewed 133 horse and 947 human WNV cases in Saskatchewan during the area's 2003 WNV outbreak. ... Read full story
 9/19/2006
Kentucky's 13th WNV Case Confirmed  *
Three Kentucky horses were confirmed as having West Nile virus (WNV) today (Sept. 19), bringing to total for 2006 to 13, according to Rusty Ford, Equine Programs Manager, Kentucky State Veterinarian's office. None of the horses were vaccinated; all are still alive. One horse was an 8-year-old Quarter Horse gelding in Fulton County, onset of clinical ... Read full story
 9/19/2006
Two More WNV Cases in Kentucky  *
West Nile virus (WNV) remains on the radar of Kentucky agriculture officials; two new equine cases were confirmed Friday (Sept. 8). Nine horses have been infected with the disease in 2006. A 4-year-old Rocky Mountain Horse mare in Adair County showed signs of the disease on Sept. 2 and was subsequently euthanatized. She had no WNV vaccination history. ... Read full story
 9/9/2006
Intervet Introduces PreveNile WNV Vaccine   *
Intervet Inc. has announced the availability of PreveNile. The new modified-live vaccine (MLV) for horses is the first one-dose West Nile virus (WNV) vaccine available for primary immunization. "PreveNile offers the most advanced WNV technology available for horses," says Marv Jahde, Intervet's Marketing Manager of Equine Products. "PreveNile is ... Read full story
 9/5/2006
Seventh WNV Positive Kentucky Horse  *
Results of diagnostic testing received today from the University of Kentucky Livestock Disease Diagnostic Center on Friday, Sept. 1, confirmed the diagnosis of the seventh case of West Nile virus (WNV) in Kentucky this year, according to Rusty Ford, Equine Programs Manager in the Kentucky State Veterinarian's office. A 2-year-old Tennessee walking ... Read full story
 9/2/2006
West Nile Virus in 31 States  *
Thirty-one states have reported detecting West Nile virus (WNV) in 2006, according to the latest data reported on the U.S. Geological Survey web site (last updated July 25). The disease has infected horses in 10 states: Colorado, Idaho, Iowa, Kansas, Missouri, North Dakota, Texas, Utah, Wisconsin, and Wyoming. Human cases have been reported in California, ... Read full story
 9/1/2006
Sixth Kentucky WNV Case Confirmed  *
The Kentucky State Veterinarian's office today (Aug. 30) confirmed the sixth case of West Nile virus in the state this year. A 6-year-old Belgian gelding in Christian County was euthanatized due to complications of the disease, noted Rusty Ford, Equine Programs Manager in the state veterinarian's office. The gelding had not been vaccinated. Onset of ... Read full story
 8/30/2006
Fifth WNV Case in Kentucky  *
A new case of West Nile virus (WNV) was confirmed today (Aug. 24) in Nelson County, Kentucky, according to Rusty Ford, Equine Programs Manager in the Kentucky State Veterinarian's office. This is the second WNV case confirmed in that county, and the fifth confirmed in the state this year. The yearling Morgan colt was euthanatized. Onset of his clinical ... Read full story
 8/24/2006
Special Reports
Our Special Reports are PDF files (including images and in some cases video) on many aspects of horse health care. We hope you enjoy these educational articles! NEW! Breathing, Stride, and Jumping Performance (Sponsored by FLAIR Nasal Strips) 2008 American Association of Equine Practitioners Convention Coverage (Sponsored by Arenus) February ... Read full story
 8/24/2006
Two More Equine WNV Cases in Kentucky  *
The Kentucky State Veterinarian's office announced today (Aug. 23) that two more cases of West Nile virus (WNV) in horses have been confirmed, bringing the total equine case count to four. "Results of testing received today from the Breathitt Veterinary Center confirm the diagnosis of West Nile virus having affected two additional horses," said Rusty ... Read full story
 8/23/2006
WNV Reported in Michigan Horse  *
Michigan's State Veterinarian Dr. Steve Halstead today announced the state's first case of West Nile Virus (WNV) in a horse for 2006. The horse was a 3-year old gelding from Washtenaw County. Dr. Halstead urges residents to take precautions that include preventing mosquito exposure during late summer outdoor activities and vaccinating horses. The ... Read full story
 8/18/2006
Five Montana Horses Diagnosed with WNV  *
West Nile virus (WNV) has been confirmed in horses in five Montana counties, state Livestock Department officials said Wednesday (Aug. 16). Horses in Cascade, Glacier, Phillips and Yellowstone counties and a second horse in Flathead County were diagnosed recently, said Dr. Jeanne Rankin, assistant state veterinarian. The first confirmed case, a ... Read full story
 8/17/2006
West Nile Virus in 24 States  *
Twenty-four states have reported detecting West Nile virus (WNV) in 2006, according to the latest data reported on the U.S. Geological Survey web site (last updated June 27). The disease has infected horses in four states: Iowa, North Dakota, Wisconsin, and Wyoming. Human cases have been reported from Colorado, Mississippi, and Texas, and according ... Read full story
 7/10/2006
Equine WNV Case Detected in Wyoming  *
Today's online edition of the Casper Star-Tribune reports that Wyoming has logged its first animal case of West Nile virus (WNV) for 2006. The disease was confirmed in the Campbell County horse on Friday (June 9). According to USDA surveillance information, 30 equine WNV cases were recorded in Wyoming in 2005. Information on WNV in Wyoming and ... Read full story
 6/13/2006
Illinois Logs First Avian WNV Case for 2006  *
(Edited press release) The Illinois Department of Public Health has announced its first avian West Nile virus (WNV) finding for 2006. Dr. Eric E. Whitaker, state public health director, said a crow collected by the DeWitt/Piatt Bi-County Health Department had WNV.The Illinois Department of Public Health (IDPH) was notified by the DeWitt/Piatt Bi-County ... Read full story
 6/7/2006
New Hampshire Begins 2006 Testing for EEE, WNV  *
The New Hampshire Department of Health and Human Services' Division of Public Health Services (DPHS) this week announced the beginning of statewide Eastern Equine encephalitis (EEE) and West Nile virus (WNV) surveillance season. The bird testing portion of the season runs from June 1 to October 31. Last year, seven people tested positive for EEE, with ... Read full story
 6/2/2006
Mosquito Season Brings West Nile Risk to Humans, Horses  *
Wear Insect Repellant, Eliminate Standing Water to keep Mosquitoes Away Pennsylvania state officials recently reminded residents to take precautions against West Nile virus during the upcoming mosquito season. "It's that time of the year again for people to take steps to reduce their risk of becoming infected with West Nile virus," says Pennsylvania ... Read full story
 5/25/2006
The Buzz On Mosquitoes   *
Mosquito control experts and human health authorities are concerned that Americans are becoming complacent about protecting themselves and their horses against West Nile virus (WNV). They discussed this trend and new mosquito control techniques to prevent the spread of mosquito-borne illnesses at the Centers for Disease Control and Prevention's (CDC) ... Read full story
 5/3/2006
WNV: A Threat to Unvaccinated Horses   *
As spring approaches and temperatures rise, growing mosquito populations will increase the risk for deadly mosquito-borne diseases, including West Nile virus (WNV) and equine encephalomyelitis (sleeping sickness). Since its discovery in the United States in 1999, WNV has spread rapidly across the country and poses a significant health threat to humans, ... Read full story
 4/24/2006
A New Model for Predicting Outbreaks of West Nile Virus  *
Infectious diseases were wreaking widespread havoc long before scientists had any idea what caused them. But knowing the pathogenic agents behind today's scourges is just the first step in protecting against deadly outbreaks. Roughly 75% of emerging infectious diseases are zoonotic--humans contract them either directly from infected animals or through ... Read full story
 4/24/2006
Human WNV Vaccine Tested   *
A team of U.S. and U.K. researchers have shown that an experimental West Nile virus (WNV) vaccine shows promise in protecting humans from the arbovirus. The study abstract appeared online April 14 in the early edition of the Proceedings of the National Academy of Sciences of the United States of America. According to the scientists, the vaccine is ... Read full story
 4/18/2006
Ohio Health Officials Begin WNV Surveillance Season  *
According to the online edition of the Bucyrus Telegraph Forum (www.bucyrustelegraphforum.com), the Ohio Department of Health began accepting dead bird submissions today (April 17) from local health departments to screen for West Nile virus (WNV). West Nile virus is spread via bites from infected mosquitoes. The mosquitoes feed on birds, which become ... Read full story
 4/17/2006
WNV Treatment Trial Begins  *
GenoMed, a medical genomics company, is seeking horses to participate in a free trial to test a medical protocol for treating West Nile virus (WNV). David W. Moskowitz, MD, MA, FACP, chairman, CEO, and chief medical officer for GenoMed, said the treatment protocol has already been successful in limited human trials. The treatment uses either angiotensin ... Read full story
 4/17/2006
Kentucky's EIA and West Nile Surveillance Program  *
During 2005, a total of 121,813 samples were tested for equine infectious anemia (EIA). For the first time since regulatory testing was initiated in the 1970s, no positive animals were identified (Figure 1). Private testing accounted for 101,650 samples to comply with state regulations regarding the sale and exhibition of equine in Kentucky or to meet ... Read full story
 4/14/2006
Decreasing Risk--Utilizing Industry-Based Standards of Care  *
Adverse animal health events do not occur randomly. Usually, there are identifiable causal--and possibly preventable--factors that can influence the development of disease. Depending upon whether the risk factors are already known or identified subsequent to a disease event, the management of a disease becomes basically one of either prevention or ... Read full story
 4/12/2006
Spring Rains Incite Mosquito Worries in California  *
Mosquito control officials are encouraging San Francisco Bay Area residents to safeguard against West Nile virus (WNV) after rains drenched Santa Clara County during most of March. ABC 7 News reported online that after an unusually wet winter and spring, Santa Clara County vector control warns the year could be a record year for the virus, which is ... Read full story
 4/10/2006
Georgia Neurologic Case Highlights Difficulty of Rule-Outs  *
A 24-year-old pleasure mare in Brunswick, Ga., was recently diagnosed with concurrent infections of equine protozoal myeloencephalitis (EPM) and equine herpesvirus type-1 (EHV-1), both of which can cause clinical signs of neurologic disease. The mare's treating veterinarians have said the neurologic deficits the mare has shown are likely caused by ... Read full story
 2/23/2006
AAEP Convention 2005: Infectious Neurologic Disease  *
Sometimes subtle and often dramatic, infectious neurologic disease cases are things veterinarians never want to see, although most would like to understand them better and more easily recognize them when they appear in clients' horses. From rabies to West Nile virus (WNV), these diseases garnered their own table topic discussion at the 2005 American ... Read full story
 2/17/2006
AAEP Convention 2005: WNV DNA Vaccine Effective in Young Horses   *
Scientists recently showed that the Fort Dodge Animal Health West Nile virus (WNV) DNA vaccine, which is licensed but not yet commercially available, should protect foals from the virus regardless of residual antibodies received at birth from their dams that often interfere with vaccine effectiveness (maternally derived antibodies, or MDA). Prior studies ... Read full story
 2/17/2006
AAEP Convention 2005: Vaccine Efficacy and Controversies  *
"There are a huge number of (vaccine) choices out there and it's hard sometimes to see our way through the forest," said Julia Wilson, DVM, Dipl. ACVIM, associate professor in Veterinary Population Medicine at the University of Minnesota. "What we should be doing is thinking about what the risk is of that disease, not just for the individual horse, ... Read full story
 2/1/2006
DNA Vaccine Protects Foals from West Nile Virus  *
Scientists recently showed that the West Nile virus (WNV) DNA vaccine, which is licensed but not yet commercially available, should protect foals from the virus regardless of residual antibodies received at birth from their dams that often interfere with vaccine effectiveness. Prior studies showed protection in yearlings and older horses. Yu-Wei Chiang, ... Read full story
 1/19/2006
Scientists Test Chimera Vaccine  *
A new research model has been developed and successfully used to test a new type of vaccine against West Nile virus (WNV). Maureen Long, DVM, PhD, Dipl. ACVIM, assistant professor at the University of Florida, proved a chimera WNV vaccine was safe and effective using this new research model developed by Dick Bowen, DVM, PhD, of Colorado State University. ... Read full story
 1/16/2006
EEE Confirmed in Michigan Horses and Deer  *
Four cases of Eastern equine encephalitis (EEE) were recently confirmed in two neighboring west Michigan counties, and another in the northeast corner of the Michigan's Lower Peninsula. The disease was also confirmed in three of seven free-ranging white-tailed deer, making Michigan only the second state in the country to detect EEE in cervids. Steve ... Read full story
 10/14/2005
Vets Watch for Hurricane-Related Illnesses  *
With water pooling in places that it normally doesn't and sharp debris all around, horse owners can't help but wonder if conditions left by Hurricanes Katrina and Rita will cause an increase in the reports of illnesses such as tetanus, encephalitis, botulism, and Potomac horse fever. Area veterinarians say they haven’t seen an increase of horses exhibiting ... Read full story
 10/12/2005
Study Might Link American Robins To West Nile Virus   *
A recent DNA study of the blood consumed by 300 mosquitoes in Connecticut over the past three years found that 40% fed on American robins, while only 1% fed on American crows, a known host of West Nile virus (WNV). Theodore Andreadis, MS, PhD, from the Connecticut Agricultural Experiment Station, led the study. Some people now wonder if crows are ... Read full story
 10/1/2005
First Equine WNV Case Reported in Virginia  *
Virginia health officials confirmed the state’s first case of equine West Nile virus (WNV) on Sept. 19. The affected 12-year-old Quarter Horse gelding, located in Albemarle County, is currently recovering. The owners had been told when they bought the gelding in the spring that he had been vaccinated, but documentation was never provided. Virginia’s ... Read full story
 9/22/2005
Katrina Increases Mosquito Population  *
Katrina Increases Mosquito Population; WNV Outbreak Not Expected The mosquito population of the Hurricane Katrina-affected areas is expected to increase at a staggering rate, according to Joe Conlon, American Mosquito Control Association (AMCA) technical advisor. However, he added the possibility of a West Nile virus (WNV) epidemic is unlikely. "We ... Read full story
 9/19/2005
Three Additional WNV Kentucky Cases  *
Three new cases of West Nile virus (WNV) were reported by the Kentucky Department of Agriculture as of Aug. 29. In Fayette County a 2-year-old Hanovarian filly had onset of symptoms on Sept. 15. She had not been vaccinated, and she is still living. In Fleming County an unvaccinated 5-year-old Tennessee Walking Horse mare was euthanatized after onset ... Read full story
 9/16/2005
West Nile Recovery x 3  *
One day, Marla Gilvin heard whinnying uncharacteristic from her 5-year-old Kentucky Mountain mare Cocoa Rain. “I went out to see what she was doing and called her to the barn,” Gilvin recalls. “She didn’t move. Her 4-month-old foal was running circles around her.” Frank Brown, DVM, of Mount Sterling Veterinary Hospital in Mount Sterling, Ky., was ... Read full story
 9/1/2005
Death and Destruction  *
West Nile virus (WNV) was first identified in October 1999 because of an alert zoo veterinarian in New York. The epicenter in 2005, as in 2004, is expected to be California. In six short years, a disease that had never been seen before in North America marched across the country like Sherman's army, leaving a path of human and animal death and destruction ... Read full story
 9/1/2005
West Nile Virus DNA Vaccine Approved for Horses   *
Commercial vaccines leapt toward state-of-the-art on July 8 when the USDA granted a license for the world's first DNA vaccine for any species. This equine vaccine springs from more than four years of collaborative research between Fort Dodge Animal Health and the Centers for Disease Control and Prevention (CDC). Fort Dodge, CDC, and the USDA jointly ... Read full story
 9/1/2005
WNV Patients Have a Long Road Ahead   *
Maureen Long, DVM, PhD, Dipl. ACVIM, assistant professor of large animal veterinary medicine at the the University of Florida, knows of at least four horses that appeared to make full recoveries from West Nile virus (WNV) before getting sick again, without apparent re-exposure. "We wonder if it's the equivalent to the human post-poliomyelitis syndrome," ... Read full story
 9/1/2005
WNV: Where Are We Today?   *
Let's face it--we were getting comfortable, perhaps complacent, in our twice-a-year visits from our horse's veterinarians for inoculations against the old, familiar diseases...Eastern and Western equine encephalitis, influenza, rabies, rhino, strangles, and maybe even botulism in some areas of the United States. Then in late summer of 1999, ... Read full story
 9/1/2005
Study Might Link American Robins to West Nile Virus  *
A recent DNA study of the blood consumed by 300 mosquitoes in Connecticut over the past three years found that 40% of them fed on American robins (Turdus migratorius), while only 1% fed on American crows (Corvus brachyrhynchos). Theodore Andreadis, MS, PhD, from the Connecticut Agricultural Experiment Station, led the study. He turned his findings ... Read full story
 8/26/2005
WNV Transmission Between Co-Feeding Mosquitoes  *
More than just birds and mosquitoes could play a key role in the spread of West Nile virus (WNV). Scientists recently determined that an uninfected mosquito can get WNV from an infected mosquito when feeding directly next to it on an uninfected mouse. The findings mean the transmission of WNV might be more complex than previously thought; mammals previously ... Read full story
 8/25/2005
Practical Mosquito Control  *
In addition to vaccination, mosquito control is critical in protecting your horses against WNV. Here's quick review on controlling mosquito populations in your barn: Eliminate areas of standing water through improved drainage, or treat them with larvacides. Get rid of scrap tires that collect water or drill holes in them; turn over birdbaths, ... Read full story
 8/9/2005
EEE and WNV Detected in New Hampshire  *
The New Hampshire Department of Health and Human Services (DHHS), Division of Public Health Services announced Friday (Aug. 5) that it has confirmed the presence of West Nile virus (WNV) in a bird found in Pembroke, N.H. Lab results provided by the State Public Health Laboratories confirmed that a crow tested positive for the virus. This follows closely ... Read full story
 8/8/2005
West Nile Virus Human Vaccine on the Way  *
Horses had a West Nile virus (WNV) vaccine within roughly two years of the first discovery of the virus in the Western Hemisphere. It has taken a little longer to get a WNV human vaccine through the pipeline and to the American public. A representative of Acambis presented the results of the Phase I clinical trials of the company's human WNV vaccine ... Read full story
 8/3/2005
California: Three 2005 Equine WNV Cases   *
As of July 5, three cases of West Nile virus (WNV) have been detected in California horses. All three cases are recovering. The first case was reported on June 1 in Plumas County. The second and third cases were from Sonoma and Kern Counties and were reported on June 10. The Plumas County horse was vaccinated for WNV, and its treating vet has credited ... Read full story
 8/1/2005
Farnam Introduces Granular Larvacide for Mosquito Control  *
"The most important step any property owner can take to control mosquito populations is to remove all potential sources of stagnant water in which mosquitoes might breed," the USDA advises. Unfortunately, many necessary water sources cannot be eliminated such as livestock ponds and horse troughs. Farnam Companies has released a new weapon for the fight ... Read full story
 7/26/2005
The New West Nile Virus DNA Vaccine Explained  *
Commercial vaccines leapt toward state-of-the-art on July 8 when the USDA granted a license for the world's first DNA vaccine for any species. Horses will benefit from this accomplishment that springs from more than four years of collaborative research between Fort Dodge Animal Health and the Centers for Disease Control (CDC). Fort Dodge, CDC, and ... Read full story
 7/20/2005
Fort Dodge Receives Approval of West Nile Virus DNA Vaccine  *
Fort Dodge Animal Health, a division of Wyeth, today announced the licensure of West Nile-Innovator DNA, a novel vaccine for horses to aid in the prevention of viremia caused by the potentially deadly West Nile virus (WNV). Fort Dodge's development of this product, in collaboration with the Centers for Disease Control (CDC), represents a tremendous ... Read full story
 7/18/2005
West Nile Virus Confirmed in Two Oklahoma Horses  *
The Oklahoma State Department of Health (OSDH) confirmed on July 7 that two horses in the southwest region of the state had tested positive for West Nile virus (WNV) The equine cases were reported in Comanche and Washita counties. "Given the fact that we are not testing birds this year, these two equine cases are our first surveillance indicators ... Read full story
 7/11/2005
West Nile Virus National and State Links  *
National Surveillance Maps Information submitted and verified to the Centers of Disease Control and Prevention by state and local officials: 2003-2006--http://westnilemaps.usgs.gov/, http://www.nwhc.usgs.gov/research/west_nile/wnv_map.html 2002--http://cindi.usgs.gov/hazard/event/west_nile/ 2001--http://cindi.usgs.gov/hazard/event/west_nile/west_nile_2001.html ... Read full story
 7/8/2005
California: Three Equine Cases of WNV for 2005  *
As of June 17, three cases of West Nile virus (WNV) have been detected in California horses. All three cases are recovering. The first case, a 3-year-old Quarter Horse in Plumas County, was reported on June 1. The second and third cases were from Sonoma and Kern Counties and were reported on June 10 and June 17, respectively. The Plumas County horse ... Read full story
 6/21/2005
Vaccine Care and Handling   *
"A lot of very smart people are not aware of how to properly handle vaccines," said Rocky Bigbie, DVM, MS, director of field veterinary services with Fort Dodge Animal Health, at the 2005 Western Veterinary Conference held Feb. 20-24 in Las Vegas, Nev. "Temperature is important, and it is important to maintain records of serial numbers, etc.," Bigbie ... Read full story
 5/1/2005
Merial Launches Site for Equine WNV Vaccine   *
Merial has announced the launch of www.EquineWNV.com, a web site that offers comprehensive information about RECOMBITEK Equine West Nile Virus (WNV) vaccine. Aimed at horse owners and veterinarians, this site offers background information, scientific research data, and answers to frequently asked questions about RECOMBITEK. The site includes a unique ... Read full story
 4/7/2005
First Florida EEE Case Reported for 2005  *
Florida Agriculture and Consumer Services (FACS) Commissioner Charles H. Bronson says this year's first case of Eastern equine encephalitis (EEE) has been reported in Union County and he is urging horse owners to have their animals vaccinated against mosquito-borne diseases. The 3-year-old horse was seen by a local veterinarian who suspected EEE. ... Read full story
 4/7/2005
WNV in Northern Indiana   *
West Nile virus (WNV) was first detected in Indiana horses in 2001. In 2002, the state reported 704 cases, the fifth-largest outbreak in the United States. Michael Ward, BVSc, MSc, MPVM, PhD, from Purdue University's School of Veterinary Medicine, and colleagues investigated the 2002 outbreak of WNV in northern Indiana horses. The purpose of the ... Read full story
 4/1/2005
West Nile Virus and Other Hot Topics  *
"Our perennial topic this morning is West Nile virus (WNV)," began Rocky Bigbie, DVM, MS, director of field veterinary services with Fort Dodge Animal Health, at the 2005 Western Veterinary Conference held Feb. 20-24 in Las Vegas, Nev. He also focused on myriad hot topics in equine veterinary medicine, discussing WNV vaccination guidelines, influenza ... Read full story
 3/4/2005
West Nile Virus: Threat and Response   *
Editor's Note: This is the third in a 12-part series of articles on vaccinations for horses. For a graphic demonstration of the value of vaccination, look no further than West Nile virus (WNV). When it roared onto the Eastern shore of the United States in 1999 (most likely thanks to a European or African bird), WNV struck fear into the hearts of ... Read full story
 3/1/2005
AAEP 2004:Infectious Diseases Forum  *
Veterinarians swapped ideas on hot topics in the realm of equine infectious disease in the Infectious Disease Forum at the 2004 American Association of Equine Practitioners Convention, held Dec. 3-8 in Denver, Colo. Steve Conboy, DVM, a private practitioner in Lexington, Ky., and Maureen Long, DVM, PhD, Dipl. ACVIM, assistant professor of large animal ... Read full story
 2/7/2005
WNV Vaccine: Safe for Broodmares   *
Researchers at Texas A&M University (TAMU) have just completed a retrospective study into the safety of administering the killed West Nile virus (WNV) vaccine to pregnant broodmares, the first study on this topic in equine reproductive research. The study looked at 595 mares from four different farms in Texas and Kentucky. The authors of the study ... Read full story
 2/1/2005
Additional Treatment Receives Conditional License   *
In the treatment of horses suffering from West Nile virus (WNV), vets have only a few choices besides supportive care. A novel WNV serum antibody product received conditional approval from the USDA in November 2004. Colorado Serum Company (CSC) announced the product's availability on Dec. 13, 2004. Serum antibody products help animals that have been ... Read full story
 2/1/2005
One Dose of WNV Recombinant Vaccine Could Help Control Outbreaks  *
A recent study at Colorado State University (CSU) found that your horse might have the ability to fight off West Nile virus (WNV) less than a month after receiving a single-dose vaccination against the disease. The challenge study tested Merial's RECOMBITEK equine WNV vaccine 26 days after immunization and found that the treated horses resisted infection. The ... Read full story
 1/31/2005
West Nile Virus Vaccination Guidelines Developed by the AAEP  *
The American Association of Equine Practitioners (AAEP) has released West Nile Virus (WNV) vaccination guidelines. This information is intended as a supplement to the AAEP's Guidelines for Vaccination of Horses (January 2001). Practitioners are directed to consult this publication as the following discussion is to be read in conjunction with those ... Read full story
 1/6/2005
Additional WNV Treatment Receives Conditional License  *
In the treatment of horses suffering from the West Nile virus (WNV), vets have only a few choices besides supportive care. A novel WNV serum antibody product received conditional approval from the USDA in November 2004. Colorado Serum Company announced the product's availability on Dec. 13, 2004. Serum antibody products help animals that have been ... Read full story
 1/4/2005
Crunching the Numbers: California's Equine WNV Mortality Rate   *
California horse owners have been keenly aware of the problem presented by West Nile virus (WNV) in 2004, but the problem took a deadly turn last year. The virus was discovered in all but one of the Golden State's 58 counties, leaving only Del Norte County without any reported cases. According to the California Department of Health Services, 42.2% ... Read full story
 12/23/2004
West Nile Virus DNA Vaccine Awaits Approval  *
A new vaccine to protect horses against West Nile virus (WNV) has been developed and submitted for USDA review. If approved, it would be the first commercially available DNA vaccine for any mammalian or animal species. Steve Chu, DVM, PhD, senior vice president, Global Research and Development, Fort Dodge Animal Health, explained the conceptual DNA ... Read full story
 12/2/2004
West Nile Virus Update for 2004  *
West Nile virus has continued its inexorable spread westward across the United States and its presence is now confirmed in all states except Alaska and Hawaii. As of October 27, the USDA reported a total of 1192 equine cases throughout the United States, of which 521 were in California and 109 in Arizona. Information on the incidence of equine cases ... Read full story
 11/3/2004
West Nile Virus Infiltrates the Upper 48; EEE Sprinkled Throughout   *
Every state in the 48 contiguous United States has now experienced a taste of West Nile virus (WNV) since it first was detected in the Western Hemisphere in 1999. Having their first encounters with West Nile virus this year were Nevada (WNV found in birds, mosquitoes, horses, and humans) and Oregon (in birds and horses). By Aug. 26, the USDA had ... Read full story
 10/1/2004
West Nile Virus Infiltrates the Upper 48; EEE Sprinkled Throughout  *
Every state in the 48 contiguous United States has now experienced a taste of West Nile virus (WNV) since it first was detected in the Western Hemisphere in 1999. Having their first encounters with West Nile virus this year were Nevada (WNV found in birds, mosquitoes, horses, and humans) and Oregon (in birds and horses). By Aug. 26, the USDA had reported ... Read full story
 9/1/2004
Nevada's First WNV Case Detected   *
The Nevada Department of Agriculture's Animal Disease & Food Safety Laboratory confirmed West Nile virus (WNV) in a Fallon County horse on July 22. The horse was euthanized June 21 after exhibiting signs consistent with WNV. The horse had not been vaccinated against WNV, said David Thain, DVM, Nevada state veterinarian. He urged residents to ... Read full story
 9/1/2004
Horse Dies from West Nile Virus at California Racetrack  *
Having identified the first known racehorse to die from the West Nile Virus (WNV) at a California racetrack, equine health authorities are emphasizing the importance of equine vaccinations and booster shots as well as other preventive measures to help prevent the spread of the disease. The California Animal Health and Food Safety Laboratory at the ... Read full story
 8/27/2004
First N.J. Equine Case of WNV is in Pregnant Mare  *
Officials at the New Jersey Department of Agriculture announced yesterday (Aug. 17) that West Nile virus (WNV) had been diagnosed in a 7-year-old pregnant mare in Gloucester County, marking the first detection of equine WNV in the state this year. The mare, which had not been vaccinated for WNV, began showing clinical signs on Aug. 10. The horse's ... Read full story
 8/18/2004
West Nile Virus Found in Oregon Bird  *
Oregon has become the last of the continental United States to be affected by West Nile virus (WNV). Malheur County officials and the Oregon Department of Human Services (DHS) confirmed Aug. 13 that a dead crow found in Vale (in the east central part of the state) was infected with WNV. The testing was conducted at Oregon State University's Veterinarian ... Read full story
 8/16/2004
Michigan's First 2004 Equine WNV Case  *
A Clinton County horse has tested positive for West Nile virus (WNV), the first of the year, veterinary officials with the Michigan Department of Agriculture (MDA) today confirmed (Aug. 13, 2005). Laboratory tests conducted in early August at the Michigan State University Diagnostic Center for Population and Animal Health confirmed the presence of ... Read full story
 8/13/2004
West Nile Virus and EEE Detected in Maryland Mosquitoes   *
Mosquitoes collected in two separate areas of Prince George's County are the first in Maryland this year to test positive for West Nile virus (WNV) and for Eastern equine encephalomyelitis (EEE). In the first instance, mosquitoes collected on July 19 from a trap in Cottage City tested positive for WNV. Mosquitoes collected on July 22 inside the Patuxent ... Read full story
 8/9/2004
WNV Cases Accumulate--States Await Detection   *
By late June, West Nile virus (WNV) cases had popped up in areas of the United States, Canada, and Central America. Twenty-six of the United States had WNV detected in at least one species (birds, horses, humans, or mosquitoes). Six states had recorded equine cases in 2004, and while horse owners are more educated than ever on WNV prevention, officials ... Read full story
 8/1/2004
Kentucky's First Equine WNV Case of 2004  *
A 20-year-old Arabian mare in Nelson County, Ky., has been euthanized following a battle with the mosquito-borne neurologic disease West Nile virus (WNV). Kentucky Department of Agriculture (KDA) officials announced confirmation of WNV in the horse on July 2, which marked the detection of the state's first equine case in 2004. Agriculture Commissioner ... Read full story
 7/6/2004
West Nile Virus Cases Accumulate--States Await Detection  *
By June 29, West Nile virus (WNV) cases had popped up in areas of the United States, Canada, and Central America. Eleven states had recorded equine cases in 2004, and while horse owners are more educated than ever on WNV prevention, officials expect to see more cases in late summer and fall, when equine and other case counts typically soar. In the ... Read full story
 7/2/2004
Encephalitis: Many Causes, Deadly Outcome   *
Equine encephalitis has been around for a long time. Old-time horsemen simply referred to it as sleeping sickness. They knew that if a horse contracted it, the animal's prognosis was not great, and that if he did recover, his ability to perform might be compromised. While these horsemen were basically correct in their categorization, this is not a ... Read full story
 7/1/2004
Virginia Logs Its First 2004 Equine WNV Case  *
The Virginia Department of Agriculture and Consumer Services (VDACS) announced 2004's first positive case of West Nile virus (WNV) in a horse on May 28. The six-year-old Thoroughbred mare lived on a farm in Culpeper County that had a positive case of WNV in 2003. She received one WNV vaccination only two weeks prior to the May 1 onset of clinical signs. ... Read full story
 6/17/2004
Equine Disease--Fourth Quarter, 2003   *
From the April 2004 issue of Equine Disease Quarterly, funded by Lloyd's of London underwriters, brokers, and their Kentucky agents The International Collating Centre in Newmarket, England, and other sources reported the following disease outbreaks in the fourth quarter of 2003: Two cases of contagious equine metritis on separate premises were ... Read full story
 6/1/2004
WNV Detected in Illinois Birds  *
Three dead birds in Illinois have tested positive for West Nile virus (WNV) since this year's statewide mosquito-borne disease surveillance began on May 1. One crow was collected in Rantoul County and positive results were confirmed on May 21. Other positive birds have been reported in DuPage County (May 12) and Adams County (May 20). In addition, ... Read full story
 5/24/2004
On-Watch for WNV in the United Kingdom  *
It was nearly five years ago when U.S. scientists were caught unaware by the deadly West Nile virus (WNV) and faced the puzzle of how that virus would adapt to a naïve population of birds and mammals in our various climates. United Kingdom researchers now are working to understand how the disease might behave in their country should they detect it, ... Read full story
 5/17/2004
Arizona and Colorado Log Equine WNV Cases  *
The tally of states with 2004 U.S. West Nile virus (WNV) equine cases has risen to five with the addition of Arizona and Colorado to the group this week. Alabama, Florida, and Texas had already logged equine cases this year. Arizona's first equine WNV case was detected in mid-August of last year, and a total of 138 equine cases were reported in the ... Read full story
 5/14/2004
New Vaccine Will Not Interfere With WNV Diagnostics  *
Scientists recently determined that vaccination with Merial Limited's Recombitek equine West Nile virus (WNV) vaccine would not confuse results if a horse were to be tested for recent WNV exposure or clinical infection. At the Western Veterinary Conference in Las Vegas, Nev., in February, Eileen Ostlund DVM, PhD, head of the equine and ovine viruses ... Read full story
 5/10/2004
U.K. Horse Owners: Be Wary of WNV in Exported Horses  *
Horse owners in the United Kingdom (U.K.) are being reminded to protect horses they are exporting to the United States from West Nile virus (WNV). However, no WNV vaccine is available in the UK. According to an article in the online publication Equine World UK, "Horses exported from the U.K. to the United States are vulnerable to infection and are ... Read full story
 5/5/2004
BLM Dispersal/Holding Options  *
The Wild Horse and Burro Program focuses on two key factors: Management of wild horses and burros whose habitat is on public lands, and programs to deal with excess animals removed from public lands. The federal Bureau of Land Management's (BLM) 2004 wild horse budget is $29 million: "The identified need is for $42.2 million in 2005 fiscal year," said ... Read full story
 5/5/2004
WNV Satellite Conference: Remain Wary of Disease  *
The years 2002 and 2003 have been the years of the horse, as far as West Nile virus (WNV) is concerned, said Robert Restifo, MS, Public Health Entomologist Administrator and chief of Ohio's Vector-borne Disease Program, at the third annual West Nile Virus Satellite Conference, in late March. "Once WNV gets into an area, it tends to stay there," he ... Read full story
 5/4/2004
HC/HERDA In the News  *
I'm amazed at some of the angry reactions that followed our publication of a news item last month on a hereditary disease called hyperelosis cutis (HC) or hereditary equine regional dermal asthenia (HERDA). Some of the researchers involved--Ann Rashmir, DVM, MS, Dipl. ACVS, associate professor of surgery and head of the Hyperelastosis Cutis Research ... Read full story
 5/1/2004
WNV: Prevention is Key   *
"West Nile virus (WNV) is the number one diagnosed neurologic disease in horses, or close to it," said William Saville, DVM, PhD, Dipl. ACVIM, of The Ohio State University, at a March 10 Fort Dodge Animal Health educational seminar for veterinarians held in Lexington, Ky. "Because of the decreased number of cases in 2003 compared to 2002, people are ... Read full story
 5/1/2004
WNV Vaccine Research   *
Horse owners and veterinarians alike have wondered if they can use Merial Limited's Recombitek equine West Nile virus (WNV) vaccine in horses previously vaccinated with Fort Dodge's West Nile-Innovator. Recently, Merial released the results of a study investigating this issue. In the study, 27 horses were vaccinated in spring of 2003 with a two-dose ... Read full story
 5/1/2004
Ohio Announces Probable Human WNV Case  *
On April 9, the Ohio Department of Health (ODH) announced its first probable case of West Nile virus (WNV) in 2004. The patient is a 79-year-old male from Scioto County. "With warm weather in recent weeks, mosquitoes have become active," said ODH Director J. Nick Baird, MD. "(This) development should remind us all of the importance of taking personal ... Read full story
 4/13/2004
New Research on the Merial WNV Vaccine  *
Horse owners and veterinarians alike have wondered if they can use Merial Limited's Recombitek equine West Nile virus (WNV) vaccine in horses previously vaccinated with Fort Dodge's West Nile-Innovator. Recently, Merial released the results of a study investigating this issue. In the study, 27 horses were vaccinated in spring of 2003 with a two-dose ... Read full story
 4/1/2004
California Birds Test Positive for West Nile Virus  *
Orange County, Calif., Vector Control District (OCVCD) biologists have found antibodies to West Nile virus (WNV) in two adult female house finches. The birds were trapped as part of the District's wild bird trapping program which involves trapping and releasing dozens of wild birds each week after drawing a small blood sample. The two birds were bled ... Read full story
 4/1/2004
West Nile Virus--An Evolving Epizootic   *
"West Nile virus (WNV) is coming to a state near you if it hasn't already arrived," said Eileen Ostlund, DVM, PhD, head of the equine/ovine viruses section at the Diagnostic Virology Laboratory, National Veterinary Services Laboratories in Ames, Iowa, during the Western Veterinary Conference held Feb. 15-19 in Las Vegas, Nev. In a comprehensive overview ... Read full story
 4/1/2004
West Nile Virus Questions and Answers   *
In a question and answer session at the Western Veterinary Conference, Eileen Ostlund, DVM, PhD, head of the equine and ovine viruses section at the Diagnostic Virology Laboratory, National Veterinary Services Laboratories in Ames, Iowa, offered these answers to the audience's West Nile virus questions. Q. Can you use Merial's recombinant canarypox ... Read full story
 4/1/2004
Texas Horse Owners Aware of WNV Threat   *
Reports have surfaced that horse owners in Texas are becoming complacent and have backed off vaccinating their animals for West Nile virus (WNV), which has infected nearly 2,400 horses in the state since late 2002. Angela Pelzel, DVM, an epidemiologist with the Texas Animal Health Commission (TAHC), reported that she doesn't believe that is the case--Texas ... Read full story
 4/1/2004
WNV: Treatment and Prevention  *
"West Nile virus (WNV) is the number one diagnosed neurologic disease in horses, or close to it," said William Saville, DVM, PhD, Dipl. ACVIM, of The Ohio State University, at a March 10 Fort Dodge Animal Health educational seminar for veterinarians held in Lexington, Ky. "Because of the decreased number of cases in 2003 compared to 2002, people are ... Read full story
 3/18/2004
West Nile Virus Q&A  *
In a question and answer session following her West Nile Virus presentation during the Western Veterinary Conference (held Feb. 15-19 in Las Vegas, Nevada), Eileen Ostlund, DVM, PhD, head of the equine and ovine viruses section at the Diagnostic Virology Laboratory, National Veterinary Services Laboratory in Ames, Iowa, offered the following answers ... Read full story
 3/12/2004
WNV: An Evolving Epizootic   *
"West Nile virus (WNV) is coming to a state near you if it hasn't already arrived," said Eileen Ostlund, DVM, PhD, head of the equine and ovine viruses section at the Diagnostic Virology Laboratory, National Veterinary Services Laboratory in Ames, Iowa, during the Western Veterinary Conference held February 15-19 in Las Vegas, Nev. In a comprehensive ... Read full story
 3/12/2004
AAEP 2003: Neurologic In-Depth Session  *
With equine protozoal myeloencephalitis (EPM), equine herpesvirus type-1 myeloencephalitis (EHV-1, more specifically EHM), and West Nile virus (WNV) on the radar of so many U.S. veterinarians, it only made sense to devote a four-hour segment of the 2003 American Association of Equine Practitioners' convention to neurologic disease and disorders. Assessing ... Read full story
 3/2/2004
Residual Effects of WNV   *
Horse owners should have equine survivors of West Nile virus (WNV) re-examined by their veterinarians before putting the animals back into work. In a study of Minnesota horses which survived clinical WNV infection, 40% showed WNV residual effects at six months after diagnosis; these neurologic effects can make the horse more dangerous to ride or drive. ... Read full story
 3/1/2004
AAEP Wrap-Up: Neurologic Disease/WNV  *
Subclinical Exposure Rate to WNV It's extremely important to vaccinate horses at least two months before the West Nile virus (WNV) season, according to Maureen Long, DVM, PhD, Dipl. ACVIM, assistant professor of large animal veterinary medicine at the University of Florida. She presented rough data regarding 2001 Florida WNV exposure rates. "Little ... Read full story
 3/1/2004
AAEP 2003: Kester News Hour  *
With researchers worldwide working on solutions to various horse health problems, there is a veritable mountain of information being published continuously. Much of this information is included in AAEP convention presentations, but some of this valuable research was either too new or brief to be included in the program. Thus, the Kester News Hour has ... Read full story
 2/18/2004
AAEP 2003: Subclinical Exposure Rate to West Nile Virus  *
If you’ve had equine cases of West Nile virus (WNV) pop up in your county, most of the equids in the area probably were exposed to the disease or even infected by the time those infections occurred. That is why it’s extremely important to vaccinate horses at least two months before the WNV season, according to Maureen Long, DVM, PhD, Dipl. ACVIM, assistant ... Read full story
 2/3/2004
New WNV Equine Recombinant DNA Vaccine Approved   *
Editor's note: A letter to the editor from Fort Dodge Animal Health cited inaccuracies in this article and has been included below. A new West Nile virus (WNV) equine recombinant canarypox vaccine received USDA registration approval on Dec. 23, 2003, and could pave the way for a new generation of equine vaccines in the United States. Merial has been ... Read full story
 2/1/2004
Purdue Team Solves WNV Structure   *
Purdue University biologists recently determined the viral structure of the West Nile virus (WNV), a development that could greatly augment our understanding of the virus' life cycle. Using cryoelectron microscopy and advanced imaging techniques, the Purdue team has determined the orientation of the major surface proteins in a West Nile viral particle. ... Read full story
 2/1/2004
Reproduction/Perinatology Forum at AAEP 2003  *
Veterinarians interested in reproduction and perinatology (the foal immediately after birth) crowded into the Reproduction/Perinatology Forum at the 2003 American Association of Equine Practitioners' convention to discuss mare reproductive loss syndrome (MRLS), terminology for the mare breeding soundness examination, vaccination of broodmares with ... Read full story
 1/31/2004
Residual Effects of WNV More Than Anticipated  *
Horse owners should be vigilant about having equine survivors of West Nile virus (WNV) re-examined by their veterinarians before putting the animals back into work. In a study of Minnesota horses which survived clinical WNV can make the horse more dangerous to ride or drive. Julia Wilson, DVM, Dipl. ACVIM, Associate Professor in Clinical and Population ... Read full story
 1/21/2004
Merial Introduces Next Generation Equine West Nile Virus Vaccine  *
Merial announced today the release of a new equine vaccine--RECOMBITEK Equine West Nile Virus (WNV) vaccine. The recent USDA approval of RECOMBITEK Equine West Nile Virus vaccine offers veterinarians a first-of-its-kind product backed by cutting-edge science to offer fast-acting and long-lasting protection from the often deadly WNV. (Click here for ... Read full story
 1/6/2004
Tell-Tale Signs of West Nile Virus   *
Unfortunately, clinical signs of West Nile virus (WNV) aren't unique, making it difficult for practitioners to suspect WNV above other neurologic diseases. For this reason, researchers from the University of Florida set out to closely scrutinize the clinical signs of WNV to see if any are particularly unusual. Records of 46 horses admitted to the hospital ... Read full story
 1/1/2004
New Vaccine for WNV Awaits Approval   *
A new West Nile virus (WNV) equine recombinant canarypox vaccine awaits USDA approval, and once available, could pave the way for a new generation of equine vaccines in the United States. Merial developed this Recombitek equine WNV technology, and assembled a group of researchers, clinicians, and private practitioners in New Orleans, La., on Nov. 19, ... Read full story
 1/1/2004
Rapid Testing for West Nile Virus   *
By the 2003 West Nile virus (WNV) season, a majority of state laboratories had obtained (or were establishing) the capacity to run the IgM Capture ELISA, the most common quick test for the disease. The test measures a class of antibody produced early after infection, can be performed on serum samples drawn from suspect cases, and takes two to three ... Read full story
 1/1/2004
New West Nile Virus Equine Recombinant DNA Vaccine Approved  *
Editor's note: A letter to the editor from Fort Dodge Animal Health cited inaccuracies in this article and can be seen by clicking here. A new West Nile virus (WNV) equine recombinant canarypox vaccine received USDA registration approval on Dec. 23, and could pave the way for a new generation of equine vaccines in the United States. Merial has been ... Read full story
 12/24/2003
Purdue Team Describes WNV Structure  *
Purdue University biologists recently determined the structure of the West Nile virus (WNV), a development that could greatly augment our understanding of the virus' life cycle. Purdue Department of Biological Sciences image The surface of a West Nile virus particle is composed of proteins that enable the virus to bind with and invade a ... Read full story
 12/15/2003
Kentucky Equine WNV Cases Drop in 2003   *
Cases of West Nile virus (WNV)in Kentucky equine declined dramatically in 2003 compared with the previous year, the Kentucky Department of Agriculture reported. The KDA said 102 Kentucky equids were confirmed with WNV this year, an 80 percent drop from 2002, when 513 cases were reported. A series of cold snaps in late November and early December ... Read full story
 12/15/2003
New Combination Vaccines Include WNV Protection  *
In 2004, your veterinarian's truck might be stocked with a new combination vaccine--protection against West Nile virus (WNV) has been folded into routinely used three-way and four-way vaccines. The new combinations, manufactured by Fort Dodge Animal Health (FDAH) in Overland Park, Kan., will be available for shipment to veterinarians the week of Jan. ... Read full story
 12/5/2003
New West Nile Virus Equine Recombinant DNA Vaccine Anticipated  *
Editor's note: A letter to the editor from Fort Dodge Animal Health cited inaccuracies in this article and has been included below. A new West Nile virus (WNV) equine recombinant canarypox vaccine awaits USDA approval; once available, it could pave the way for a new generation of equine vaccines in the United States. Merial has been developing this ... Read full story
 12/4/2003
CDC Prediction: California Might be WNV Epicenter in 2004   *
A Centers for Disease Control and Prevention (CDC) official has predicted that the West Coast will be hit hard with West Nile virus (WNV) next year, particularly California. According to the Cincinnati Enquirer, Lyle Peterson, MD, acting director of CDC's division of vector-borne diseases, said in a speech Oct. 1 at the University of California's ... Read full story
 12/1/2003
Plasma Product Licensed For WNV Treatment  *
On Oct. 23, Lake Immunogenics became the first company to receive a USDA conditional license for West Nile virus (WNV) Antibody, Equine Origin, as a plasma product. The product already was a USDA-licensed plasma product under the name HiGamm-Equi, and was used off-label to treat WNV infection before it was licensed for this use. COURTESY LAKE ... Read full story
 11/5/2003
WNV Treatment Licensed   *
Novartis Animal Vaccines announced Aug. 19 the conditional licensing and availability of the only antibody product approved by the USDA to help control disease caused by West Nile virus (WNV) in equids. This product helps an exposed animal by increasing the antibody level in the circulatory system, which enhances an animal's ability to neutralize virus ... Read full story
 10/1/2003
West Nile Virus: The Fifth Year  *
Even with a conditionally approved treatment for West Nile virus (WNV) available, prevention is still key. As of Sept. 9, WNV equine cases had been reported in 37 states, and only four of the continental United States (Idaho, Nevada, Oregon, and Washington) had not reported WNV detection in any species. Official reports and suggestions from veterinarians ... Read full story
 9/10/2003
More on the Licensed WNV Treatment  *
Novartis Animal Vaccines announced Aug. 19 the conditional licensing and availability of the only antibody product approved by the USDA to help control disease caused by West Nile virus (WNV) in equids. This product helps an exposed animal by increasing the antibody level in the circulatory system, which enhances an animal's ability to neutralize virus ... Read full story
 9/10/2003
Hyperimmune Plasma for WNV Horses  *
Veterinarians have been using an antibody product to treat West Nile virus (WNV) clinical signs, but its use for this purpose is currently off-label (not approved by the USDA). Currently, the hyperimmune plasma product HiGamm-Equi, by Lake Immunogenics, is being examined by the USDA for conditional approval. HiGamm-Equi is typically used for failure ... Read full story
 9/10/2003
Suspect EEE or WNV Cases in Rhode Island  *
The Rhode Island Department of Environmental Management has been notified of three suspected cases of encephalitis in horses in Rhode Island. All three horses are from Washington County and are being investigated for possible West Nile Virus (WNV) and Eastern Equine Encephalitis (EEE) infections. One horse died, one had to be euthanized, and one is ... Read full story
 9/8/2003
Dutch, Israeli Researchers Developing West Nile Virus Vaccine  *
Crucell N.V., a Dutch biotechnology company, and the Israel-based Kimron Veterinary Institute are anticipating the approval of their veterinary West Nile Virus (WNV) in Israel in early 2004. Based on encouraging results from their early work, they will conduct a field before the end of this year on approximately 2,000 geese using the vaccine. A spokesman ... Read full story
 9/8/2003
West Nile Virus Treatment Licensed  *
Novartis Animal Vaccines announced Aug. 19 the conditional licensing and availability of the only antibody product approved by the USDA to help control disease caused by West Nile virus (WNV) in equids. This product helps an exposed animal by increasing the antibody level in the circulatory system, which enhances an animal’s ability to neutralize virus ... Read full story
 9/5/2003
First 2003 West Nile Virus Finding in California  *
The first evidence of West Nile virus (WNV) in California this year was found in mosquitoes collected in Imperial County near the Salton Sea, announced Diana M. Bontá, RN, DrPH, state health director, on Aug. 20. Several flocks of sentinel chickens from the same region are also likely positive for WNV based on preliminary testing. The testing of ... Read full story
 8/27/2003
New WNV Antibody Treatment Explained  *
This week, Novartis Animal Vaccines publicly announced the conditional licensing and availability of the only antibody product approved to aid in the control of disease caused by West Nile virus (WNV), by helping an exposed animal neutralize virus in the blood. The approval was announced on Aug. 7 to USDA officials and state veterinarians. COURTESY ... Read full story
 8/20/2003
West Nile Virus Antibody Product Receives Conditional License  *
The USDA's Animal Plant Health Inspection Service has issued a conditional license to Novartis Animal Vaccines, Inc., for the manufacture and distribution of West Nile Virus Antibody, Equine Origin, for treatment of disease caused by West Nile virus (WNV). Typically, antibody products are very specific and mimic the activity of naturally occurring ... Read full story
 8/19/2003
2003 West Nile Virus Updates  *
The West Nile virus (WNV) 2003 season is well underway. Reports of equine cases are steadily rolling in from states where the virus has been detected before, and veterinary and public health officials in those states that haven't experienced cases in the past four years are likely readying for their first detection of WNV. The USDA reported Aug. 11 ... Read full story
 8/15/2003
West Nile Virus Vaccine: Adverse Reproductive Effects?   *
Top veterinarians and the USDA dispute allegations made in a May 30 article in The Denver Post that the West Nile virus (WNV) vaccine might have caused widespread abortions and deformed foals. Mare owners calling themselves the "Lost Foals Group" claimed the vaccine caused up to 1,200 abortions and nearly 300 deformed or dummy foals. A news release ... Read full story
 8/1/2003
Vaccination Protocols and Internal Parasite Controls  *
Preventing infectious diseases and parasites from attacking our horses are primary concerns for every horse owner. James D. Smith, DVM, a practitioner at Hagyard-Davidson-McGee Associates, PLLC, in Lexington, Ky., and Craig Reinemeyer, DVM, PhD, president of East Tennessee Clinical Research in Knoxville, Tenn., provided invaluable insight into how ... Read full story
 7/29/2003
2003 Equine WNV Outlook for the United States  *
The U.S. Department of Agriculture (USDA) Center for Epidemiology andAnimal Health, a part of USDA's Animal and Plant Health InspectionService's (APHIS) Veterinary Services program (VS), recently released itsoutlook for the occurrence of West Nile virus (WNV) in equids during 2003. The outlook discusses factors that influence the viral threat to equids ... Read full story
 7/23/2003
West Nile Virus Spreads: Horses in at Least 15 States Affected This Year  *
West Nile virus (WNV) is steadily spreading across the country, having been detected in at least 33 states so far this year*. Horses in 15 states have been infected with the virus in 2003; the most recent announcements of equine WNV cases were from Kansas and New Mexico. Health officials in Kansas announced July 9 that they had logged the state’s ... Read full story
 7/16/2003
Mexico Declares West Nile Virus State of Emergency  *
According to a Reuters health story distributed via ProMED-mail, Mexico has declared a state of emergency due to West Nile virus (WNV), declaring it a severe risk to the horse population and a growing public health threat. The first discovery of avian WNV in Mexico was made on May 16 in Tabasco state. The finding prompted the government to launch ... Read full story
 7/15/2003
2002 Economic Impact of WNV on Colorado and Nebraska   *
A study led by researchers at Colorado State University (CSU) found that West Nile virus (WNV) cost equine owners in Colorado and Nebraska more than $1.25 million in 2002, and prevention costs for WNV vaccination likely topped another $2.75 million for the equine industry in those states last year. In 2002, Colorado reported 378 confirmed cases of ... Read full story
 7/1/2003
USDA Clarification on the Issue of the West Nile Virus Vaccine: Vaccine Safe for Use  *
From the USDA: "Some recent stories have suggested that the Fort Dodge Animal Health West Nile Virus Vaccine approved by the U.S. Department of Agriculture (USDA) may cause pregnant mares to abort or give birth to deformed foals. The misleading information in those articles has sparked many anxious phone calls from horse owners, veterinarians, and ... Read full story
 6/26/2003
Veterinarians Debunk Suggested Link Between WNV Vaccine and Birth Problems  *
Despite recent media reports, Wyoming, Colorado, and USDA veterinarians say that there is currently no scientific proof to link the West Nile virus vaccine to aborted, stillborn, or deformed foals, and that horse owners should continue to vaccinate their animals to protect them from the deadly disease. Claims by a Denver newspaper that some pregnant ... Read full story
 6/23/2003
Fort Dodge Speaks Out on WNV Vaccine  *
Over the course of the past few weeks, news articles and Internet rumors have surfaced regarding the West Nile-Innovator vaccine, the USDA-approved vaccine for protecting horses against West Nile virus. The rumors and misinformation pertain specifically to abortions and deformed foals following vaccination for West Nile virus. An article published ... Read full story
 6/12/2003
West Nile Virus Vaccine: Adverse Effects in Mares?  *
Allegations that the West Nile virus vaccine might have caused abortions and deformed foals were made in a May 30 Denver Post article. Mare owners calling themselves the “Lost Foals Group” claim the vaccine has caused up to 1,200 abortions and nearly 300 deformed or dummy foals. However, top veterinarians dispute those allegations based on their experiences. Tom ... Read full story
 6/9/2003
Insurance Provides Comfort to Horse Owners and Breeders Against West Nile Virus  *
In Canada, Alberta and Ontario horse breeders and owners insured through CBL Oxford Insurance and Canada Brokerlink can feel confident that its horse mortality insurance policies will provide compensation for any horses killed by the West Nile virus (WNV). Canada Brokerlink Inc., one of the largest insurance brokers in Canada, has informed policyholders ... Read full story
 6/3/2003
First WNV Case of 2003 Detected In Florida   *
One equine case of West Nile virus (WNV) in Florida had been confirmed by serological testing as of May 1, according to Leroy Coffman, DVM, Florida's state veterinarian and director of the Division of Animal Industry. This was the first reported equine case of WNV in the state this year, and possibly the first in the United States this year. The ... Read full story
 6/1/2003
First 2003 Kentucky Equine WNV Case Confirmed  *
Kentucky has its first confirmed case of West Nile virus (WNV) in an equine for 2003, the Kentucky Department of Agriculture's Division of Animal Health reported on Thursday. The 20-year-old pleasure horse is located in Madison County, said Rusty Ford, the Department's equine programs manager. The horse is recovering and the prognosis is good. "West ... Read full story
 5/29/2003
Kentucky Department of Agriculture's Mosquito Spraying Schedule Now Online  *
Local authorities and the Kentucky Department of Agriculture (KDA) have begun mosquito eradication efforts to combat the spread of West Nile virus (WNV). The KDA's mosquito spraying schedule can be found on the KDA web site at www.kyagr.com. The Department will spray for mosquitoes at the request of local officials and local health departments. Some ... Read full story
 5/22/2003
West Nile Virus from the Front Lines  *
Bill Saville, DVM, PhD, Dipl. ACVIM, is a veterinary epidemiologist in the Veterinary Preventive Medicine Department at The Ohio State University’s College of Veterinary Medicine. In the past decade, Saville has become widely recognized for his studies of equine protozoal myeloencephalitis (EPM), a neurologic disease that has affected thousands of ... Read full story
 5/19/2003
The Ohio West Nile Virus Experience  *
When Bill Saville, DVM, PhD, Dipl. ACVIM, was asked to form the Ohio West Nile Virus (WNV) Working Group in late 1999, the disease was still a distant concern in New York City where health officials had identified the first North American case of the virus in a dead crow in August 1999. By December 2000, the health problem was literally on Ohio’s doorstep ... Read full story
 5/19/2003
Equine West Nile Virus Case in Arkansas  *
Arkansas state veterinarian Paul Norris, DVM, announced last week that a horse in the Ft. Smith area had been infected with West Nile virus (WNV). Testing on the Sebastian County horse was completed at USDA’s National Veterinary Services Laboratory. Sharon Williams, DVM, state public health veterinarian with the Department of Health, said, "The identification ... Read full story
 5/19/2003
Avian West Nile Virus in Louisiana   *
Two dead blue jays from Assumption and Jackson parishes and a dead cardinal from Union Parish have pushed Louisiana’s count of West Nile virus (WNV)-positive dead birds past 30. The total number of dead birds infected with the virus is now 33, with 541 birds tested this year and 3,091 reported. The three parishes these new dead birds came from previously ... Read full story
 5/16/2003
Nine EEE Cases in Georgia  *
According to several Georgia newspapers, Eastern equine encephalitis (EEE) has struck nine horses in the southern part of the state. Only three cases were documented in Georgia in 2002. EEE is caused by a virus found in wild birds, and it is transmitted to horses and humans via the bite of an infected mosquito. Horses do not develop high enough levels ... Read full story
 5/16/2003
First 2003 Equine WNV Case In North Dakota  *
North Dakota's state veterinarian Larry Schuler, DVM, reported the state's first 2003 equine case of West Nile virus (WNV) on May 8. According to Schuler, test results received from Texas A&M University indicated that a horse in the Fargo area (Cass County) had been infected with the virus. "Since the majority of West Nile virus cases usually ... Read full story
 5/12/2003
First 2003 WNV Finding in Pennsylvania for 2003  *
On Monday, May 5, acting secretary for department of health Robert S. Muscalus reported the first positive test for the West Nile virus (WNV) in Pennsylvania in 2003. The virus was detected in a dead crow in Philadelphia. Acting Secretary for the Department of Environmental Protection (DEP) Kathleen A. McGinty emphasized the importance of homeowners ... Read full story
 5/8/2003
Report Released: Economic Impact of WNV on Colorado and Nebraska Equine Industries in 2002  *
A study led by researchers at Colorado State University determined that the effects of West Nile virus (WNV) cost equine owners in Colorado and Nebraska more than $1.25 million in 2002, and prevention costs for WNV vaccinations likely exceeded an additional $2.75 million for the equine industry in those states last year. In 2002, Colorado reported ... Read full story
 5/6/2003
Equine West Nile Virus Case in Minnesota  *
A 5-year-old Quarter Horse mare in Crow Wing County, was Minnesota's first equine West Nile virus (WNV) case for 2003, according to the Minnesota Board of Animal Health (MBAH). Paul Anderson, MBAH assistant director, said the virus was expected to appear again this year, but not so early in the season. The first U.S. equine WNV case of 2003 was reported ... Read full story
 5/5/2003
California West Nile Virus Seminar   *
California is bracing for West Nile virus (WNV). N. James MacLachlan, BVSc, PhD, Professor and Chair of the Department of Pathology, Microbiology, and Immunology at the University of California, Davis, said that he and his colleagues expect to see the first dead birds infected with WNV in April, followed by the first horse and human cases in June and ... Read full story
 5/1/2003
Box Containing WNV Explodes at Fed Ex Site   *
A package containing West Nile virus (WNV) exploded on March 18 at a Federal Express building in Columbus, Ohio, near the Port Columbus International Airport, the Associated Press reported. Fifty workers were evacuated. The shoebox-size sealed package probably burst because of dry ice used to preserve tissue samples from a bird with the virus. The ... Read full story
 5/1/2003
West Nile Virus Innovator Vaccine  *
Rob Keene, DVM, field veterinarian for Fort Dodge Animal Health, talked about the West Nile virus (WNV) vaccine at the West Nile Virus Workshop held March 7 at the University of Kentucky's Gluck Equine Research Center. Keene explained plans for packaging and marketing the vaccine--which received a full license from the USDA on Feb. 6--and described ... Read full story
 5/1/2003
Colorado State West Nile Virus Study   *
Colorado State University (CSU) researchers released results March 25 from a study that examined the characteristics of 2002's West Nile virus (WNV) equine outbreaks in Colorado and Nebraska. The study was a collaborative effort between the state veterinarians in Colorado and Nebraska, the Veterinary Diagnostic Center in Nebraska, and CSU's College ... Read full story
 5/1/2003
A Florida Practitioner's Perspective on WNV  *
Maureen Long, DVM, PhD, Dipl. ACVIM, of the University of Florida (UF), spoke about West Nile virus (WNV) protective strategies for horse owners and veterinarians at a March 7 meeting in Lexington, Ky. Veterinarians and public officials gathered at the University of Kentucky's Gluck Equine Research Center for a workshop designed to educate local practitioners ... Read full story
 5/1/2003
Canada Reports First 2003 Presumed WNV-Positive Bird  *
York Region Acting Medical Officer of Health, Dr. Hanif Kassam, has announced that a dead crow has undergone testing and is presumed to be positive for West Nile virus (WNV ). The crow was found in the town of Newmarket. The bird is the first presumed WNV-positive bird reported in the York Region of Ontario, and the first in Canada this year. Equine ... Read full story
 4/29/2003
Mosquito Disease Could Slow Spread of West Nile Virus  *
A disease that kills mosquitoes could be one way to slow the spread of West Nile virus (WNV), the USDA said in an Associated Press story. Jim Becnel, a scientist with the USDA's Agricultural Research Service, said Wednesday he and a team of researchers have come up with a new method to kill mosquitoes by infecting them with an illness called baculovirus ... Read full story
 4/25/2003
Pennsylvania Launches 2003 West Nile Virus Surveillance Program  *
Pennsylvania health official announced April 14 that Pennsylvania has launched this year's effort to detect and control mosquitoes that carry West Nile virus (WNV). "It's that time of the year againtime to get your yard back in shape or just get out and enjoy Pennsylvania's natural wonders," Acting Secretary Dr. Robert Muscalus said. "But don't forget ... Read full story
 4/16/2003
Owners Recommended to Consult with Vet about WNV Vaccination  *
Now is the time for horse owners in Kentucky to consult withtheir veterinarians about vaccinating their animals for West Nile virus (WNV),Kentucky's Agriculture Commissioner Billy Ray Smith said. "West Nile virus was diagnosed in 513 equine and 75 humans in Kentucky lastyear," Smith said. "Kentuckians can take steps now to reducethe risk of West Nile ... Read full story
 4/4/2003
EEE and WNV Hit Florida  *
Ten cases of Eastern equine encephalitis (EEE) and one case of West Nile virus (WNV) have been confirmed by serological testing as of April 3 in eight Florida counties, according to Leroy Coffman, DVM, Florida’s state veterinarian and director of the Division of Animal Industry. This is the first reported case of WNV in Florida this year, and possibly ... Read full story
 4/3/2003
WNV and Equine Abortions?   *
A question has been raised whether the increased number of West Nile virus (WNV) cases in Kentucky in late summer and fall 2002 contributed to a rise in fall abortions. A retrospective study by the University of Kentucky's Livestock Disease and Diagnostic Center (LDDC), from July of 2002 through early 2003, looked at 400 equine abortions for evidence ... Read full story
 4/1/2003
Colorado State Releases West Nile Virus Survey Study  *
Researchers at Colorado State University's College of Veterinary Medicine and Biomedical Sciences today released results from a research project that summarizes the background characterization of last year's outbreak of West Nile virus (WNV) in equids from Colorado and Nebraska. "The objective of the study was to describe the equine West Nile virus ... Read full story
 3/25/2003
Box Containing Virus Explodes at Fed Ex Site  *
The Associated Press reported in the New York Times that a package containing West Nile virus exploded on Tuesday night (March 18) at a Federal Express building in Columbus, Ohio. Fifty workers were evacuated. “Fire officials said dry ice used to preserve tissue samples with live virus might have caused the shoebox-size package to burst at the FedEx ... Read full story
 3/20/2003
House Passes Bill Aimed at West Nile Virus Prevention  *
In a 416-9 vote, the U.S. House of Representatives has passed a bill that would authorize $100 million in grants for communities to develop mosquito-control programs, according to an Associated Press news release. Lawmakers hope the bill, which also passed the House last year, will slow the spread of the West Nile virus, which ran rampant across ... Read full story
 3/14/2003
Gluck West Nile Virus Workshop: A Review of WNV in Kentucky  *
Kentucky has kept extensive statistics on West Nile virus (WNV) cases in the state. At the March 7 West Nile Virus Workshop at the University of Kentucky’s Gluck Equine Research Center, Rusty Ford, Kentucky Equine Programs Manager, reviewed equine WNV statistics from past years. He also described how the state planned to make reporting cases easier ... Read full story
 3/13/2003
West Nile Virus Workshop: WNV and Public Health  *
"This is the largest arboviral (disease) epidemic ever documented in the Western Hemisphere," said Sue Billings, DVM, MSPH, Kentucky Department for Public Health Medical Epidemiologist. Billings has been working with the public health side of West Nile virus (WNV) surveillance since the virus first appeared in mosquitoes, birds, and horses in Kentucky ... Read full story
 3/13/2003
West Nile Virus Innovator Vaccine  *
Rob Keene, DVM, field veterinarian for Fort Dodge Animal Health, talked about the West Nile virus vaccine at the West Nile Virus (WNV) Workshop held March 7 at the University of Kentucky’s Gluck Equine Research Center. Keene explained plans for packaging and marketing the vaccine--which received a full license from the USDA on Feb. 6--and described ... Read full story
 3/12/2003
California West Nile Virus Seminar  *
California is bracing for an onslaught of West Nile virus (WNV) in horses this year. N. James MacLachlan, BVSc, PhD, of the University of California, Davis, said that he and his colleagues expect to see the first dead birds infected with WNV in April, followed by the first horse and human cases in June and July. To help California horsemen prepare, ... Read full story
 3/10/2003
West Nile Virus Vaccination   *
The following responses to questions are from Rob Keene, DVM, a field technical consulting equine veterinarian with Fort Dodge Animal Health (FDAH), manufacturers of the West Nile virus vaccine. The West Nile virus (WNV) vaccine is probably one of the best-known vaccines on the market right now. How did you get it ready so quickly after WNV was ... Read full story
 3/1/2003
West Nile Virus Found In Aborted Kentucky Fetuses   *
Evidence of West Nile virus (WNV) was found in 35 aborted fetuses in Kentucky since July of 2002, according to Lenn Harrison, VMD, head of the Kentucky Livestock Disease Diagnostic Center in Lexington. "We have handled about 400 aborted fetuses and tested them, so this is less than 10%," he reported on Feb. 4. He emphasized that WNV has not been known ... Read full story
 3/1/2003
AAEP Convention: Kester News Hour   *
Probably the best-attended session of the AAEP annual convention, the Kester News Hour provides brief reports of studies that were too new or too brief to be included in the longer scientific sessions. Larry Bramlage, DVM, MS, Dipl. ACVS, the president-elect of the AAEP and a surgeon at Rood and Riddle Equine Hospital in Lexington, Ky.; and John Madigan, ... Read full story
 3/1/2003
AAEP Convention: New/Emerging Diseases  *
INFECTIOUS DISEASE FORUM With West Nile virus (WNV) marching across the United States and affecting both horses and humans, infectious disease prevention has been a hot topic in barns, the media, veterinary clinics, and elsewhere. During the Infectious Disease Forum, moderated by Josie Traub-Dargatz, DVM, MS, Dipl. ACVIM, professor of equine ... Read full story
 3/1/2003
West Nile Virus Found in Overwintering Mosquito in Pennsylvania  *
Pennsylvania Department of Environmental Protection and Lehigh County West Nile virus (WNV) personnel detected WNV in a Catasaqua Borough mosquito pool. The West Nile virus workers were collecting samples to determine the status of the virus in overwintering mosquitoes. Officials emphasized that this species of mosquito, Culex pipiens, is not active ... Read full story
 2/26/2003
West Nile Virus Vaccine Receives Full Licensure  *
The USDA has issued a full license to Fort Dodge Animal Health for its West Nile virus (WNV) vaccine that has been distributed under a conditional license since August of 2001. Results of efficacy studies completed and submitted to the USDA qualified the vaccine for full licensure. According to Tom Overbay, DVM, director, Field Veterinary Services ... Read full story
 2/24/2003
WNV and Kentucky Abortions?  *
A question has been raised whether the increased number of West Nile virus (WNV) cases in Kentucky in late summer and fall 2002 contributed to a rise in fall abortions. A retrospective study by the University of Kentucky’s Livestock Disease and Diagnostic Center (LDDC), starting in July of 2002 and going through early 2003, looked at 400 equine abortions ... Read full story
 2/5/2003
AAEP 2002: Infectious Disease/Epidemiology Sunrise Session  *
There was tremendous interest in and opportunity for information exchange on the topic of infectious diseases during the AAEP Convention. Early Friday morning, Maureen Long, DVM, PhD, Dipl. ACVIM, of the University of Florida, and Josie Traub-Dargatz, DVM, MS, Dipl. ACVIM, of Colorado State University, headed a session to discuss relevant topics and ... Read full story
 2/4/2003
KAEP Statement Regarding Kentucky Abortions  *
The statement below was released Feb. 2 by the Kentucky Association of Equine Practitioners. “Due to the increased surveillance of any equine abortions in the past two years, the Lexington Disease and Diagnostic Center (LDDC) has increased efforts to identify causes for these abortions. The LDDC is performing additional tests other than the routine ... Read full story
 2/3/2003
AAEP 2002: Kester News Hour  *
Probably the best-attended session of the American Association of Equine Practitioners (AAEP) annual convention, the Kester News Hour provides brief reports of studies that were too new or too brief to be included in the longer scientific sessions. Larry Bramlage, DVM, MS, Dipl. ACVS, the president-elect of the AAEP and a surgeon at the Rood and Riddle ... Read full story
 2/3/2003
West Nile Virus Gets Endemic Disease Status; Fees Will be Charged for Some WNV Testing   *
Government veterinary officials recently designated West Nile virus (WNV) as an endemic disease in the United States. The USDA's Animal and Plant Health Inspection Service (APHIS) Veterinary Services (VS) previously had considered WNV a Foreign Animal Disease (FAD), since it had never been detected in the United States prior to 1999. (Read more about ... Read full story
 2/1/2003
2002 American Association of Equine Practitioners Convention   *
Thousands of equine veterinarians visited Orlando, Fla., Dec. 4-8, 2002, with the health and welfare of their equine patients at heart. The annual convention of the American Association of Equine Practitioners (AAEP) served up research presentations and current events appropriate for the equine practitioner seeking valuable continuing education, and ... Read full story
 2/1/2003
Three West Nile Virus Studies Underway at Colorado State  *
Equine veterinarians at Colorado State University's James L. Voss Veterinary Teaching Hospital are currently involved in three research projects to analyze the statistics from 2002’s outbreak of West Nile virus (WNV) in two Western states. One study will assess the long-term status of horses that had the virus. With the help of several second year ... Read full story
 1/13/2003
WNV Vaccination in Mares and Foals   *
There were nearly 14,000 reported cases of West Nile virus (WNV) in the United States in 2002 by the end of November, and many broodmares were exposed to the virus even if not clinically affected. As the country begins its fifth year of handling the disease, broodmare owners have many questions about how to vaccinate mares and foals appropriately. ... Read full story
 1/1/2003
West Nile Virus Detected in Florida Alligators   *
Three farm-raised alligators from Central Florida have tested positive for West Nile virus (WNV), according to officials at the University of Florida (UF) College of Veterinary Medicine (CVM). This is the first time the virus has affected U.S. reptiles. Multiple agencies were involved in the diagnosis, including the CVM, the Centers for Disease Control ... Read full story
 1/1/2003
West Nile Virus Changed to Endemic Disease Status; Fees will be Charged for Some WNV Testing   *
Government veterinary officials recently designated West Nile virus (WNV) as an endemic disease in the United States. The USDA’s Animal and Plant Health Inspection Service (APHIS) Veterinary Services (VS) previously had considered WNV a Foreign Animal Disease (FAD), since it had never been detected in the United States prior to 1999. (Read more about ... Read full story
 12/28/2002
Horseman's Day at the 2002 AAEP Convention  *
Horseman’s Day, held for the third time as part of the annual AAEP convention, was another rousing success. There weren’t as many people in attendance as there were in San Diego last year, but they were just as enthusiastic. AAEP officials said that 266 were in attendance at the Orlando session compared to 400-plus last year and about 200 when the ... Read full story
 12/17/2002
AAEP 2002: Infectious Disease Forum  *
With West Nile virus (WNV) marching across the United States and affecting both horses and humans, infectious disease prevention has been a hot topic in barns, the media, veterinary clinics, and elsewhere. During the Infectious Disease forum, moderated by Josie Traub-Dargatz, DVM, MS, Dipl. ACVIM, professor of Equine Medicine at Colorado State University's ... Read full story
 12/17/2002
AAEP 2002: Biologic and Therapeutic Agents Forum  *
Among the topics of interest discussed were plasma products, compounding, and West Nile virus. The discussion of plasma products centered around the current United States Department of Agriculture licensure of only some of these products. Until 1995, noted Dr. Jim Bowman, president of Lake Immunogenetics, all plasma products were licensed by the USDA. ... Read full story
 12/11/2002
West Nile Virus Vaccination in Mares and Foals  *
There were nearly 14,000 reported cases of West Nile virus (WNV) in the United States in 2002 by the end of November, and many broodmares were exposed to the virus even if not clinically affected. As the country begins its fifth year of handling the disease, broodmare owners have many questions about how to vaccinate mares and foals appropriately. Rob ... Read full story
 12/4/2002
West Nile Virus Vaccination Program  *
On Nov. 3, the Florida Equine Practice Committee met in Ocala, Fla. One of the main topics of discussion was the protocol for using the West Nile virus equine vaccine manufactured by Fort Dodge Animal Health. According to Dr. Maury B. Linkous of Odessa, Fla., who took part in the meeting, Dr. Maureen Long, a faculty member of the veterinary school ... Read full story
 12/4/2002
West Nile Virus Still Spreading  *
As of Nov. 3, cases of equine illness caused this year by West Nile virus (WNV) confirmed at the USDA's National Veterinary Services Laboratories had risen to 12,843; 12,105 cases more than the final case count for 2001. Vaccinating for WNV and considering horses with signs of neurological disease as potential WNV cases has become an everyday practice ... Read full story
 12/1/2002
West Nile Virus Found in Washington Horse  *
The Washington State Department of Agriculture (WSDA) recently announced that West Nile virus (WNV) has been confirmed in a 14-year-old horse in Island County. The horse, which became ill early in October, is recovering. It is the first horse known to have become infected with WNV in Washington. “This is a reminder for horse owners to consider vaccinating ... Read full story
 11/26/2002
WNV Continues to Spread  *
As of Nov. 3, cases of equine illness caused this year by West Nile virus (WNV) confirmed at the USDA’s National Veterinary Services Laboratories had risen to 12,843; 12,105 cases more than the final case count for 2001. Vaccinating for WNV and considering horses with signs of neurological disease as potential WNV cases has become an everyday practice ... Read full story
 11/6/2002
WNV Vaccine Challenge Study   *
Research and development representatives from Fort Dodge Animal Health (FDAH) presented results from their challenge study of the West Nile virus (WNV) vaccine on Sept. 18. The information was presented at the World Organisation for Animal Health (Office International des Epizooties--OIE) meeting "Vaccines for OIE list A and Emerging Diseases" in Ames, ... Read full story
 11/1/2002
WNV Holds Up Australian Quarantine  *
The Australian Horse Industry Council congratulated quarantine authorities for their actions in the case of a horse which became sick during quarantine in Sydney and later was determined to have West Nile virus (WNV). Horse Council president Paul O'Callaghan, BVSc, said, "The horse was only released after a risk assessment based on sound science and ... Read full story
 11/1/2002
Preakness Runner-Up Positive for WNV   *
Magic Weisner, the popular Thoroughbred gelding who finished second at long odds in the Preakness, was diagnosed Sept. 9 with West Nile virus (WNV), said Bob Vallance, DVM, the horse's local veterinarian in Maryland. Vallance was in daily contact with veterinarians at the New Bolton Center in Pennsylvania, where Magic Weisner was a patient beginning ... Read full story
 11/1/2002
First Equine West Nile Virus Case Detected in Connecticut  *
The Connecticut Department of Agriculture recently reported the first clinical domestic animal case of West Nile virus (WNV) infection during 2002. The two-year-old horse from Canterbury presented on Sept. 20 with a lack of appetite, depression and dragging of its hind legs. A blood sample submitted to the Connecticut Veterinary Diagnostic Laboratory ... Read full story
 10/15/2002
Protect Your Animals Against West Nile Virus  *
The U.S. Department of Agriculture is recommending that animal owners take several precautions to protect their animals from West Nile virus. "Given that mosquitoes were associated with the 1999 outbreak, the key to preventing or controlling future outbreaks of West Nile virus among horses, livestock, or poultry is to prevent animals from being exposed ... Read full story
 10/11/2002
West Nile Virus Detected in Washington  *
West Nile virus (WNV) has been detected in a dead raven collected near Newport, Wash. Testing at the National Wildlife Health Center Laboratory in Madison, Wisc., confirmed the virus. This is the first WNV detection in Washington, according to the state Department of Health. There have been no human or equine cases of WNV acquired in the state. "West ... Read full story
 10/9/2002
Equine Cases of West Nile Virus Illness in 2002: Jan. 1-Sept. 29  *
The total number of equine cases of illness caused by West Nile virus confirmed at the USDA's National Veterinary Services Laboratories or reported by state officials so far this year is 7,462. That is an increase of 1,239 cases since Sept. 22. The cases are from 36 states: Alabama (39), Arkansas (64), Colorado (296), Delaware (1), Florida (180), ... Read full story
 10/3/2002
You Should Be Afraid, But...   *
West Nile virus is here to stay. Just like its cousins Eastern and Western equine encephalitis, it can be controlled, but only with diligence and hard work. West Nile virus (WNV) is deadly in about 40% of the horses which get the disease. It strikes hardest the horses which are old, young, or have compromised immune systems. But horses are lucky; they ... Read full story
 10/1/2002
West Nile Virus Moves West in Canada   *
Horse owners in Canada are becoming just as wary of the neurological disease West Nile virus (WNV) as their U.S. neighbors (see "West Nile Virus Alert" on page 32). The virus, which is harbored by birds and spread by the bite of an infected mosquito, has already affected at least 10 horses in the Manitoba province, and officials are recommending mosquito ... Read full story
 10/1/2002
West Nile Virus Alert!  *
by Kimberly S. Herbert and Stephanie L. Church West Nile virus is a dangerous and scary disease, and it is spreading across North America very quickly. However, this is one of the few times when horses have it better than humans when it comes to facing disease. There is an effective equine vaccine against West Nile virus (WNV); there isn't one for ... Read full story
 10/1/2002
Vaccine Licensing  *
Any company trying to put a new vaccine on the market must follow a specific process to obtain a license from the USDA before the product can be used in the horse population. A vaccine receives either a conditional or full license after a series of purity, safety, efficacy, and potency tests. But what does all of this licensing jargon mean? The Horse ... Read full story
 9/27/2002
First West Virginia Equine WNV Cases Detected  *
Three equine cases of West Nile virus (WNV) have been confirmed in West Virginia, according to state veterinarian Lew Thomas, DVM. The cases were detected over the last three weeks, and WNV was confirmed in each horse by the USDA National Veterinary Services Laboratory in Ames, Iowa. Tests on three other suspected cases are pending. Affected horses ... Read full story
 9/26/2002
Equine Cases of West Nile Virus Illness in 2002: Jan. 1-Sept. 22  *
The total number of equine cases of illness caused by West Nile virus confirmed at the USDA's National Veterinary Services Laboratories or reported by state officials so far this year is 6,223. That is an increase of 843 cases since Sept. 17. The cases are from 34 states: Alabama (39), Arkansas (56), Colorado (242), Florida (130), Georgia (25), Illinois ... Read full story
 9/24/2002
West Nile Virus Vaccine Challenge Study Q&A  *
Research and Development representatives from Fort Dodge Animal Health presented results from their challenge study of the West Nile virus (WNV) vaccine on Sept. 18. The information was presented at the World Organisation for Animal Health (Office International des Epizooties--OIE) meeting "Vaccines for OIE list A and Emerging Diseases" in Ames, Iowa. ... Read full story
 9/20/2002
Equine Cases of West Nile Virus Illness in 2002: Jan. 1-Sept. 17  *
The total number of equine cases of illness caused by West Nile virus (WNV) confirmed at the USDA's National Veterinary Services Laboratories (NVSL) or reported by state officials so far this year is now 5,380. That is an increase of 774 cases from 5 days ago. The cases are from 33 states: Alabama (34), Arkansas (52), Colorado (164), Florida (130), ... Read full story
 9/18/2002
WNV Vaccine Study Abstract Released  *
Fort Dodge Animal Health recently received USDA approval to release the following abstract regarding the West Nile virus vaccine and its efficacy. More information on the topic was presented in today's sessions at the World Organisation for Animal Health (Office International des Epizooties--OIE) meeting "Vaccines for OIE list A and Emerging Diseases" ... Read full story
 9/18/2002
More Cases of Equine West Nile Virus in Virginia  *
The Virginia Department of Agriculture and Consumer Services (VDACS) announced Monday that additional horses have tested positive for West Nile virus (WNV), bringing the total number of equine WNV cases in the state this year to 17. The latest additions include five from the Northern Virginia area and one from Accomack County on Virginia's Eastern ... Read full story
 9/18/2002
Pennsylvania Stops Testing Birds for West Nile Virus  *
Starting today through next spring, Pennsylvania’s West Nile virus program will no longer accept birds for routine testing in 29 counties. However, state officials are asking citizens to continue phoning 877/PA-HEALTH to report dead birds that may have been infected with West Nile. Dead bird sightings are an important factor in determining mosquito ... Read full story
 9/17/2002
Equine Cases of West Nile Virus Illness in 2002: Jan. 1-Sept. 12  *
The total number of equine cases of illness caused by West Nile virus (WNV) confirmed at the USDA's National Veterinary Services Laboratories (NVSL) or reported by state officials so far this year is 4,606, as of Sept. 12. The cases are from 32 states: Alabama (27), Arkansas (43), Colorado (139), Florida (130), Georgia (15), Illinois (249), Indiana ... Read full story
 9/14/2002
Preakness Runner-Up Positive for West Nile Virus, Condition Improving  *
Magic Weisner, the popular gelding who finished second at long odds in the Preakness, was diagnosed Monday with West Nile virus (WNV), said Dr. Bob Vallance, a Maryland veterinarian. Vallance, Magic Weisner's local veterinarian, has been in daily contact with veterinarians at the New Bolton Center in Pennsylvania. Magic Weisner has been a patient ... Read full story
 9/11/2002
Saskatchewan Horses Test Positive for West Nile Virus  *
Six horses in Saskatchewan, Canada, have been diagnosed with West Nile virus (WNV). Horse owners are encouraged to take preventive measures. A conditionally licensed vaccine can be obtained through your veterinarian. West Nile virus is a flavivirus that can infect many different types of animals but causes sickness only in a small number of species. ... Read full story
 9/11/2002
Equine Cases of West Nile Virus Infection in 2002: Jan. 1-Sept. 8  *
Illness caused by West Nile virus (WNV) infection has been confirmed by the USDA's National Veterinary Services Laboratories (NVSL) in equids from 30 states: Alabama, Arkansas, Colorado, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maryland, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, New Jersey, New Mexico, ... Read full story
 9/10/2002
More than 600 Equine Cases of West Nile Virus in Nebraska  *
The number of WNV cases continues to rise in Nebraska horses, with more than 600 testing positive with the disease. The Nebraska Department of Agriculture updated its numbers on Sept. 9, with 647 positive equine cases documented in 83 Nebraska counties. The first equine case in Nebraska was confirmed Aug. 6. The total confirmed cases include: Sioux-5; ... Read full story
 9/10/2002
Kentucky Equine West Nile Virus Case Count Climbs to 150   *
The number of cases of West Nile virus in Kentucky equine in 2002 reached 150 when 17 cases were confirmed on Sept. 6, the state Department of Agriculture reported. The most recently confirmed cases were spread among 15 counties from Fleming in the east to Webster in the west. Eleven of the 17 are alive, three were euthanized, and three died. Four ... Read full story
 9/10/2002
American Quarter Horse Association, Foundation Present West Nile Virus Seminar  *
Anyone interested in learning more about West Nile virus (WNV), its effects on horses, treatments and vaccines are invited to attend a free seminar presented by the American Quarter Horse Association and American Quarter Horse Foundation's Education Department. The program, which begins at 6 p.m. on Mon., Sept. 9, will be held inside the American ... Read full story
 9/4/2002
Equine Cases of West Nile Virus Infection in 2002: Jan. 1-Sept. 2  *
Illness caused by West Nile virus (WNV) infection has been confirmed by the USDA's National Veterinary Services Laboratories (NVSL) in equids from 28 states this year as of Sept. 2: Alabama, Arkansas, Colorado, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, New ... Read full story
 9/4/2002
West Nile Virus Vaccine Q&A  *
The following information is from Rocky Bigbie, DVM, a representative of Fort Dodge Animal Health, the company that manufacturers the West Nile virus (WNV) vaccine. Company officials recommend that horse owners consult with their own veterinarians to get more specific details about the threat to their horses. What is the vaccination schedule in normal ... Read full story
 9/3/2002
Equine Herpes Outbreak in Australia   *
A mare (or mares) imported from North America to Victoria, Australia, is believed to be at the center of the latest outbreak of equine herpes virus (EHV-1), or equine rhinopneumonitis virus, in Australia. As the Australian Thoroughbred breeding season officially got under way on Sept. 1, at least a dozen farms were quarantined. Most are in Victoria, ... Read full story
 9/3/2002
Officials Report 112 Equine Cases of West Nile Virus in Kentucky  *
Twenty-three cases of West Nile virus in Kentucky horses were confirmed Monday, the state Department of Agriculture reported. The number of Kentucky horses with the virus in 2002 now is 112. The 23 horses confirmed today are of 10 different breeds, including the first Appaloosas and the first Belgian in Kentucky to be diagnosed with West Nile virus. ... Read full story
 9/3/2002
Summary of Recent Australian Quarantine Case  *
The Australian Horse Industry Council has congratulated the quarantine authorities for their action and decisions in the case of a horse that became sick during quarantine in Sydney. Horse Council president, Dr Paul O'Callaghan said "The horse was only released after a risk assessment based on sound science and good consultation. The Post Arrival ... Read full story
 9/3/2002
West Nile Virus in 32 States and D.C.   *
West Nile virus (WNV) has continued its advance across the United States, making its debut in states untouched by the virus before 2002. In all, 32 states and Washington, D.C., had been affected this year as of press time (by the end of 2001, 27 states and D.C. had WNV). Newly affected states include Texas, Oklahoma, West Virginia, North and South ... Read full story
 9/1/2002
Kentucky Equine WNV Cases Reach 89   *
The Kentucky Department of Agriculture announced late on Aug. 30 that 20 more horses have been confirmed with West Nile virus. That brings the total number of 2002 equine WNV cases in Kentucky to 89.Of the 20 horses reported today, 12 are alive, seven were euthanized, and one died. Four of the 20 had received their first shot in the WNV vaccination ... Read full story
 8/30/2002
Australian Shuttlers Released From Quarantine  *
In the wake of a positive West Nile Virus (WNV) test on a Canadian Standardbred horse, almost 50 Thoroughbred shuttle stallions were released from Australia's major quarantine station outside Sydney on the morning of Aug. 30. The decision for the release of Astreos and the other stallions came after a national teleconference the previous day. The ... Read full story
 8/30/2002
Recent Kentucky WNV Horses Not Fully Vaccinated  *
To clarify information released yesterday (Aug. 29) on two Kentucky horses which were reported to have been vaccinated yet contracteedWest Nile virus (WNV), the Kentucky State Veterinarian's office noted that those two horses had not received their second dose of theinitial series of vaccine. Researchers and veterinarians don't expect the vaccine to ... Read full story
 8/30/2002
The Path of West Nile Virus in Canada  *
Horse owners in Canada are becoming just as wary of the neurological disease West Nile virus (WNV) as their U.S. neighbors. The virus has already affected at least ten horses in the Manitoba province, and officials are recommending mosquito control techniques and equine vaccination.The virus was first detected in Canada Aug. 23, 2001 in a dead bird ... Read full story
 8/30/2002
First Equine Case of West Nile Virus in Vermont  *
Animal health officials with the Vermont Department of Agriculture, Food & Markets have confirmed that a horse in Franklin County has tested positive for West Nile virus (WNV), ending three years of speculation as to when and where the first case would occur. The horse is said to be stable and is recovering. Since the virus is not contagious, agricultural ... Read full story
 8/30/2002
Kentucky Equine West Nile Virus Cases Total 69  *
Six Quarter Horses are among the 13 new confirmed cases of West Nile virus (WNV) in the state's equine population, the Kentucky Department of Agriculture announced Thursday. The total number of equine in Kentucky confirmed infected with WNV in 2002 now is 69. Seven of the 13 announced Thursday are alive, four were euthanized, and two died. Two of ... Read full story
 8/29/2002
First West Nile Virus Cases in New Mexico, Montana  *
New Mexico and Montana joined the list of states affected by West Nile virus (WNV) Thursday when they announced their first equine cases. A New Mexico ranch horse from Tucumcari, in the eastern part of the state, did not survive WNV, and was not vaccinated against the illness. Initial test results received from the National Veterinary Services Laboratories ... Read full story
 8/23/2002
Mosquito Infected with West Nile Virus Found at Churchill Downs  *
Officials with the Jefferson County, Ky. Health Department said that at least one mosquito infected with West Nile virus has been found at Churchill Downs. The discovery of the mosquito came during a routine examination of a group of insects collected at the Louisville track. Local health officials have made regular checks of mosquitoes at the track ... Read full story
 8/23/2002
West Nile Virus Cases Down in Ocala Area  *
Many Marion County, Fla., horse farm owners took the advice of their veterinarians seriously and vaccinated their horses against the vector-borne West Nile virus (WNV) last autumn. Officials believe it has resulted in a decrease in the number of cases in 2002. According to statistics from the United States Department of Agriculture Animal and Plant ... Read full story
 8/23/2002
Kentucky Reports 13 More WNV Cases  *
The Kentucky Department of Agriculture announced late Friday, Aug. 23, that 12 more Kentucky horses were confirmed today as having West Nile virus (WNV). One additional horse was confirmed on Thursday, Aug. 22. This brings the number of Kentucky equine WNV cases to 38 in 2002. The cases confirmed today include three from Fayette County and one each ... Read full story
 8/23/2002
West Nile Virus Spreads in Illinois  *
The number of Illinois counties reporting West Nile virus (WNV) activity grew to 82 with the Aug. 19 confirmation that a horse from Massac County has tested positive for the mosquito-transmitted virus. In addition to the Massac County horse, nine other horses--in Clay (1), Montgomery (1), Madison (4), Union (2) and Wabash (1) counties-–were reported ... Read full story
 8/22/2002
First WNV Cases Detected in Mules and Mosquitoes in Kansas  *
The Kansas Department of Health and Environment (KDHE) has confirmed the presence of West Nile virus (WNV) in two mules--one in Montgomery County and one in Sedgwick County. The virus was also found in a mosquito population collected from Barton County. The laboratory testing for WNV in Kansas was done at Kansas State University (KSU) Veterinary Diagnostic ... Read full story
 8/22/2002
Genetics and West Nile Virus  *
A recent study in mice completed by French researchers suggest that some individuals might be genetically predisposed to have a deadly reaction to West Nile virus (WNV). The study was published in this week's issue of the Proceedings of the National Academy of Sciences. A Reuters report explained that the researchers bred a strain of mice that quickly ... Read full story
 8/22/2002
Safety Tips for Animal Owners During Mosquito Spraying  *
As more cases of West Nile virus (WNV)-associated illness have been diagnosed in people and horses, communities have taken steps to prevent spread of the virus. Mosquito control is the most effective means of preventing spread of WNV and many communities are including spray application of pesticides in their control programs. Although approved pesticides ... Read full story
 8/22/2002
25 Equine WNV Cases in Kentucky  *
The Kentucky Department of Agriculture announced late on Wednesday, Aug. 21, that six more horses had been confirmed positive for West Nile Virus (WNV) in the state. None had been vaccinated. Five of the horses are alive and one was euthanized on Aug. 19. This brings the total number of confirmed horses in the state to 25. Following are the most recent ... Read full story
 8/21/2002
West Nile Virus Moves Westward in Horses  *
West Nile virus (WNV) has appeared in horses as far west as Wyoming and Colorado, according to reports from state officials and the United States Department of Agriculture. Equine cases have also been found in Michigan and Oklahoma for the first time. Confirmed or preliminary equine cases have been reported from at least 24 states in 2002. Many horse ... Read full story
 8/19/2002
Four More WNV Cases Confirmed in Kentucky  *
The Kentucky State Veterinarian's office late on Monday, Aug. 19, confirmed that four more horses in Kentucky have been confirmed as having West Nile virus (WNV). None of the horses had been vaccinated. This brings the total of WNV cases in Kentucky this year to 19. Of those 19 cases, nine survived, eight were euthanized, and two died. The four new ... Read full story
 8/19/2002
West Nile Virus Detected In Three Colorado Horses and a Crow  *
West Nile virus (WNV) has been detected in the blood of two horses and a crow from Weld County and one horse from Pueblo County. John Pape is an epidemiologist who specializes in animal-related diseases for the Colorado Department of Public Health and Environment's Disease Control and Environmental Epidemiology Division. He said this is the first ... Read full story
 8/16/2002
Seven More WNV Cases Confirmed In Kentucky  *
The Kentucky State Veterinarian’s office reported late on Friday, Aug. 16, that seven more horses in the state had been confirmed positive for West Nile virus (WNV). That brings the total number of positive horses in the state this year to 15, according to Rusty Ford of the State Veterinarian's office. Of those 15 cases this year, seven survived, seven ... Read full story
 8/16/2002
West Nile Virus Detected in South Carolina For First Time  *
A dead blue jay found in Lexington County has tested positive for the West Nile virus (WNV), making it the first confirmed evidence of the disease in South Carolina, the state Department of Health and Environmental Control (DHEC) reported Aug. 13. "I urge South Carolinians to be aware of West Nile virus and to take some simple steps to protect themselves ... Read full story
 8/15/2002
Churchill Downs, Farms Take Steps Against West Nile Virus  *
Churchill Downs' primary weapon against the West Nile virus (WNV) sits in a clear, plastic vial on the desk of track superintendent Butch Lehr, according to AP writer Chris Duncan. The vial holds birdseed-like pellets that release a chemical that kills mosquitoes in their larval stage. The chemical is otherwise safe and is harmless to horses, making ... Read full story
 8/15/2002
Kentucky Has Fourth West Nile Virus Horse  *
A fourth horse has tested positive for West Nile virus (WNV) in Kentucky. The 5-year-old draft-cross gelding first showed signs on July 26, and he was euthanized on July 29 after becoming recumbent and unable to rise, according to Rusty Ford of the Kentucky State Veterinarian’s office. The gelding was from Greenup County. Ford said there are three ... Read full story
 8/9/2002
First Equine West Nile Virus Cases in Georgia for 2002  *
Tests confirmed July 31 that West Nile virus (WNV) led to the death of a Pike County horse earlier in July. Tests also confirmed that a horse in Putnam County had contracted the disease, but fully recovered. The Tifton Veterinary Diagnostic and Investigational Laboratory and the University of Georgia College of Veterinary Medicine conducted the tests. Georgia ... Read full story
 8/5/2002
West Nile Virus Encephalitis   *
In August 1999, West Nile virus (WNV) was identified as the cause of encephalitis in birds, horses, and humans in New York. Since then, WNV activity has spread north and south along the East Coast, and west to several states following bird migration patterns. Prior to its introduction in New York, WNV was reported to cause outbreaks in other parts ... Read full story
 8/1/2002
West Nile Virus in Texas Birds, Kentucky Horse   *
West Nile virus (WNV) has continued its march westward, recently being detected for the first time in Texas in two blue jays in northwest Houston. Additionally, the disease made its 2002 Kentucky equine debut in a Thoroughbred yearling. Since its first detection in the Western Hemisphere in 1999, WNV, which is harbored by birds and transmitted by ... Read full story
 8/1/2002
West Nile Virus in Minnesota and South Dakota Horses  *
The Minnesota Board of Animal Health announced July 30 that West Nile virus (WNV) has been confirmed in four Minnesota horses through testing conducted by the U.S. Department of Agriculture’s National Veterinary Services Laboratories (NVSL) in Ames, Iowa. Minnesota’s first confirmed WNV cases in horses involve single horses in Hennepin, Clay, Roseau, ... Read full story
 7/31/2002
West Nile Virus in Ontario, Canada  *
According to Ontario’s Ministry of Health and Long-Term Care, as of July 30, 2002, West Nile virus (WNV) has been confirmed in 38 birds, and another five birds are presumably positive in Ontario. The confirmed and presumed positive birds have been found in the following regions: Chatham-Kent (8 confirmed),Haldimand-Norfolk (1 presumed),Haliburton-Kawartha-Pine ... Read full story
 7/31/2002
West Nile Virus Detected in South Dakota  *
West Nile virus (WNV) has been detected in a dead crow in Aberdeen, South Dakota, a state health official said June 26. Testing at the State Public Health Laboratory in Pierre confirmed the virus. This is the first detection of the virus in South Dakota and the furthest west the virus has been detected nationally. "West Nile has been detected in ... Read full story
 7/28/2002
West Nile Virus Exhibit at Dallas Museum of Natural History  *
The Dallas Museum of Natural History opens a special educational exhibit about West Nile virus (WNV), Wed., July 31. The exhibit allows visitors to explore what the virus is, how it originated, how we can protect ourselves and how it is spread. West Nile virus has caused illness and death in birds, humans, and horses since its first appearance in ... Read full story
 7/26/2002
West Nile Virus In 31 States and D.C. in 2002  *
West Nile virus (WNV) has continued its advance across the United States, appearing for the first time in 2002 where it has visited in previous years, and making its debut in other states untouched by the virus before 2002. In all, 31 states and Washington, D.C., have been affected this year (by the end of 2001, 27 states had WNV). In the past week, ... Read full story
 7/25/2002
West Nile Virus Confirmed in Oklahoma   *
The Oklahoma State Department of Health and Tulsa City-County Health Department confirmed July 18 that a crow found in the Tulsa city limits has tested positive for West Nile virus (WNV). This is the first detection of the virus in Oklahoma. No equine or human cases have been reported in the state. A finding of WNV was expected this summer since states ... Read full story
 7/19/2002
Second West Nile Virus Horse Euthanized In Kentucky  *
The Kentucky State Veterinarian’s office reported this evening that a 5-year-old Tennessee Walking Horse gelding in Nelson County has tested positive for West Nile virus (WNV). The gelding began showing clinical signs on July 9, and his ataxia (incoordination) was so severe that he was euthanized on July 10. Diagnostic tests done at the University ... Read full story
 7/18/2002
West Nile Virus in Arkansas and North Dakota  *
A horse in Grand Forks County, ND, has been confirmed as positive for West Nile virus (WNV). This is the first-ever detection of WNV in North Dakota. The horse was an approximately 2-year-old Quarterhorse gelding that became ill on June 30, 2002, and had to be euthanized on July 2. The horse had never been out of the Grand Forks County area and was ... Read full story
 7/16/2002
More West Nile Virus Found in Kentucky  *
A total of seven birds and one horse have tested positive for West Nile virus (WNV) in Kentucky in 2002, according to Rusty Ford of the Kentucky State Veterinarian’s office. The one horse, which was euthanized, was from Fayette County. Two birds were found in Jefferson and Metcalfe Counties, and one each was found in Laurel, Oldham, and Woodford Counties. ... Read full story
 7/10/2002
Probable First Equine West Nile Virus Case in Texas   *
Preliminary tests indicate that Texas has its first equine West Nile virus (WNV) case. The sick horse was euthanized June 29 near Katy, Texas. West Nile virus was detected for the first time in Texas on June 18 near Houston; since then, 29 infected birds have been found. "We were notified today (July 3) that tests run on samples of the horses's blood ... Read full story
 7/5/2002
West Nile Virus Education is Key   *
"Whether or not West Nile virus (WNV) is going to become a serious concern in your state, the media is going to make it one," stated Bill Saville, DVM, PhD, Dipl. ACVIM, of The Ohio State University's (OSU) Department of Veterinary Preventive Medicine. At the American College of Veterinary Internal Medicine meeting, Saville shared the sizable effort ... Read full story
 7/3/2002
West Nile Virus Vaccine: Where It's Been, Where It's Going  *
West Nile virus (WNV) has become a 365-day-a-year virus--new cases of disease have been detected every month in Florida since its initial appearance there last year, except for March of 2002. Where there are mosquitoes year-round, there will be arboviral diseases year-round. Therefore, veterinarians are encouraging horse owners to vaccinate their horses ... Read full story
 7/1/2002
Mosquito Patrol   *
Mosquitoes are more than a nuisance, they are a public and equine health hazard. In addition to spreading West Nile virus (WNV), mosquitoes can carry malaria, yellow fever, dengue, filariasus (e.g., dog heartworm), and several encephalitis viruses including St. Louis, Eastern, Western, Venezuelan, and La Crosse. In a backhanded way, this is a benefit ... Read full story
 7/1/2002
Researchers Share West Nile Virus Tips  *
Veterinarians experienced in the surveillance, treatment, and public education of West Nile virus (WNV) presented their research and observations of the disease at the recent annual meeting of the American College of Veterinary Internal Medicine held in Dallas, Texas, May 29-June 1. West Nile virus has been recognized in 27 states, and it is important ... Read full story
 7/1/2002
West Nile Virus Testing  *
A key in West Nile virus (WNV) surveillance is reporting disease incidence--WNV is a reportable disease in all states. Testing of suspect clinical cases is a service provided by the federal and state governments. It costs nothing at the national level if the submission is approved by a United States Department of Agriculture (USDA) Area Veterinarian-in-Charge ... Read full story
 7/1/2002
First Equine Case of West Nile Virus in Kentucky  *
West Nile virus (WNV) has been identified in a horse in Kentucky for the first time this year, according to the Kentucky state Department of Agriculture's Office of the State Veterinarian. The Thoroughbred yearling colt from Fayette County died after being presented to an equine veterinary facility with acute incoordination and overstepping, said ... Read full story
 6/27/2002
West Nile Virus Confirmed in Texas  *
West Nile virus (WNV) was confirmed June 18 in two dead blue jays found in northwest Houston, Texas. Veterinarians at the Texas Animal Health Commission (TAHC), the state's livestock health regulatory agency, are urging owners of horses, mules, donkeys, and other equids to ensure that their animals have been vaccinated against not only WNV, but also ... Read full story
 6/19/2002
The Spread of West Nile Virus in 2002  *
West Nile virus (WNV) didn’t wait until the summer to start spreading this year—cases were reported as early as January. As of May 24, the virus had been found in 12 states. It was estimated that WNV would spread across the United States within four years, but many scientists think that it might move faster. “West Nile virus has been changing and ... Read full story
 6/5/2002
West Nile Virus in Washington, D.C., New York, and New Jersey  *
Department of Health representatives from Washington, D.C., New York, and New Jersey have detected their first avian cases of West Nile virus (WNV) in 2002. Washington, D.C., reported its first WNV-infected bird on May 13, which was found May 1 a block from the national zoo. May 16 brought the health department laboratory announcement of a WNV-positive ... Read full story
 5/22/2002
West Nile Virus Detected in Three More States  *
Virginia, Illinois, and Pennsylvania have been added to the list of states affected by West Nile virus (WNV) in 2002. While WNV has been detected in all three states in past years, these positive bird findings showed up very early compared to past years of surveillance. In 2001, Virginia's earliest finding of WNV in a bird was mid-July, Pennsylvania ... Read full story
 5/15/2002
West Nile Virus Education  *
A live satellite broadcast within Ohio March 20 disseminated information about West Nile virus (WNV) to extension and health personnel at remote locations, who then could ask questions of the expert presenters. The broadcast from Columbus, Ohio, was linked to 94 sites throughout the state. WNV was detected for the first time in Ohio birds in 2001. ... Read full story
 5/1/2002
West Nile Virus 2001 Report Released, Map Online for 2002 Cases  *
Cases of equine West Nile virus (WNV) infection have been reported in Florida, and a bird has tested positive in Louisiana. Keep up with the spread of WNV in 2002 with our WNV map of cases. Current Map of West Nile Virus Infection in 2002 (updated 4-16-02) Further information on the Florida and Louisiana positive cases:http://www.thehorse.com/ViewArticle.aspx?ID=3440http://www.thehorse.com/ViewArticle.aspx?ID=3438http://www.thehorse.com/ViewArticle.aspx?ID=3403 Following ... Read full story
 4/18/2002
Health Officials Tracking West Nile Virus  *
Health officials charting the spread of West Nile virus across the United States project that "Texas and at least up to the Rocky Mountains will be affected" by the virus in 2002, said Dr. Kristen Bernard, assistant director of the Arbovirus Laboratories at the Wadsworth Center, New York State Department of Health. Bernard spoke during the Kentucky ... Read full story
 4/5/2002
More West Nile Virus in Florida  *
The Florida Department of Agriculture and Consumer Services (FDACS) has received reports of two positive cases of Eastern equine encephalitis (EEE) and one positive case of West Nile virus (WNV) in horses in Polk County, Florida. This marks the descent of WNV into southern Florida. Florida Agriculture Commissioner Charles H. Bronson today called ... Read full story
 4/3/2002
Florida Reports First West Nile Virus Cases For 2002   *
The Florida Department of Health (DOH) and the Florida Department of Agriculture and Consumer Services (FDACS) reported Feb. 18 that the first equine cases of West Nile virus (WNV) for 2002 had been found. Three horses tested positive for WNV in Marion County, which had the highest concentration of cases in 2001. FDACS Commissioner Charles Bronson ... Read full story
 4/1/2002
West Nile Virus in Louisiana  *
Last week, Louisiana officials announced the state’s first finding of West Nile virus (WNV) in 2002. A cardinal bird from East Baton Rouge Parish tested positive for WNV at the Louisiana Veterinary Diagnostic Lab at the Louisiana State University Veterinary School on March 21. In response to this case, the Mosquito Control Board has been notified ... Read full story
 3/27/2002
First Animal Cases of West Nile Virus for 2002 Reported  *
The Florida Department of Health (DOH) and the Florida Department of Agriculture and Consumer Services (FDACS) announced Feb. 18 that the first cases of West Nile virus (WNV) for this year have been reported. It has been confirmed that a wild turkey in Calhoun County, a hawk in Alachua County, one sentinel chicken in Volusia County, and three horses ... Read full story
 2/22/2002
WNV Web Site Launched for Horse Owners  *
Fort Dodge Animal Health has taken a proactive approach to keeping horse owners informed of the spread and dangers of West Nile virus (WNV) by launching a web site and developing educational literature on the disease. In just two years, WNV has become one of the fastest-growing health threats to horses in the United States. Experts believe that this ... Read full story
 2/1/2002
AAEP Convention 2001: Veterinary Forums   *
The day before the scientific sessions started during the AAEP Convention, there was a series of forums and committee meetings. These were moderated by selected experts in those fields, and were open to anyone for a majority of the time. The last 45 minutes of the meetings were open only to AAEP members to discuss anything they felt was too sensitive ... Read full story
 2/1/2002
AAEP Convention 2001: Kester News Hour   *
The Kester News Hour kicked off the scientific program of the AAEP convention. Named for the late veterinarian General Wayne O. "Sage" Kester, first president of the AAEP, the hour was designed to cover timely topics that were too brief and/or too new to be included in the scientific portion of the convention. Larry Bramlage, DVM, MS, Dipl. ACVS, ... Read full story
 2/1/2002
Diagnosing West Nile Virus   *
A recent report outlined a series of cases of West Nile virus infection in horses seen at the University of Pennsylvania's New Bolton Center. The findings might help horse owners and veterinarians identify this infection more readily. Eight horses from New York and New Jersey were referred to New Bolton Center with evidence of neurological disease. ... Read full story
 1/1/2002
West Nile Virus Site Launched for Horse Owners  *
Fort Dodge Animal Health has taken a proactive approach to keeping horse owners informed on the spread and dangers of West Nile virus (WNV) by launching an information-packed web site and developing educational literature. In just two years, WNV has become one of the fastest growing health threats to horses in the United States. As a mosquito-borne ... Read full story
 12/27/2001
U.S. West Nile Virus Activity, Nov. 7-13, 2001  *
The following report summarizes West Nile virus (WNV) surveillance data reported to the Centers for Disease Control (CDC) through ArboNET and verified by states and other jurisdictions as of Tuesday, Nov. 13, 2001.During the week of Wednesday, Nov. 7 to Tuesday, Nov. 13, 2001, three human cases of WNV encephalitis or meningitis were reported from New ... Read full story
 11/16/2001
Kentucky Confirms WNV Suspect Case  *
A 2-year-old Thoroughbred at Churchill Downs in Jefferson County was confirmed today to have West Nile virus (WNV), according to the Kentucky State Veterinarian's office. That horse had been highly suspect and was being treated as a WNV case, and confirmatory laboratory results were received today from the National Veterinary Services Laboratory in ... Read full story
 11/16/2001
Kentucky Logs More WNV Cases  *
Eight horses in Kentucky have been confirmed to have West Nile virus (WNV), and four of those horses have been euthanized. One of the confirmed horses was a Thoroughbred shipped to Fayette County, Kentucky, from Florida which developed signs after arriving in Kentucky. That horse improved and since has been shipped back to Florida. One horse suspected ... Read full story
 11/15/2001
West Nile Virus Suspected in Horse at Churchill Downs  *
Officials awaited word Nov. 12 on whether a Churchill Downs-based horse euthanized Oct. 25 had West Nile virus (WNV). A preliminary diagnosis indicated Rocket Express, a 2-year-old colt, had contracted the virus.The Kentucky State Veterinarian's office investigated the matter, and expected the results of tests by mid-November. The office was closed ... Read full story
 11/12/2001
Equine Cases of West Nile Virus Infection, Jan. 1-Oct. 31, 2001   *
There have been 347 cases (344 confirmed, three probable) of clinical West Nile virus (WNV) infection in horses from 18 States (see Summary by state and county, below). Of 262 horses for which an outcome has been reported to date, at least 59 (22.5 percent) died or were euthanized. The numbers of equine deaths associated with WNV infection by state ... Read full story
 11/7/2001
First West Nile Virus Positive Horses Confirmed in Tennessee, Illinois  *
According to an Oct. 25 United States Department of Agriculture (USDA) Plant and Animal Health Inspection Service (APHIS) Emergency management warning, a horse in Greene County, Tennessee, has been confirmed as positive for West Nile virus (WNV) infection. These were the first confirmed equine cases of clinical WNV infection detected in Tennessee and ... Read full story
 11/2/2001
West Nile Virus Case Definition  *
“Probable,” “presumptive,” “suspected,” and “confirmed.” All of these words are used to describe equine cases tested for West Nile virus (WNV). The cases might be “confirmed” on a local, state, or national level. What do these descriptions mean, and why don’t the totals reported by state and national agencies always match? “It is easy to get confused ... Read full story
 11/2/2001
West Nile Virus--Mosquito Not Required  *
Researchers at the United States Geological Survey's (USGS) National Wildlife Health Center in Madison, Wis., recently discovered that West Nile virus can be passed from bird to bird in a laboratory setting without the bite of a mosquito. The mosquito previously was regarded as necessary for transmission between birds. At this point, there is little ... Read full story
 11/2/2001
West Nile Continues Migration  *
"The inevitable has occurred," said Bruce L. Akey, DVM, when the first positive West Nile virus (WNV) bird case was confirmed in Prince Edward County, Va., on Oct. 13. Akey is director of Virginia's veterinary lab system. Then, as if the deadly disease had mapped its course down the line of East Coast states, its presence was confirmed in a dead crow ... Read full story
 11/2/2001
West Nile Virus Update  *
Public concern has grown in New England after findings of the West Nile virus in more dead birds and mosquitoes. (For updated WNV coverage, visit http://www.thehorse.com/TopicSearch/Default.aspx?n=West+Nile+Virus+(WNV)&nID=6&ID=79.) West Nile virus (WNV) is a type of encephalitis spread by the bite of an infected mosquito, and made its first ... Read full story
 11/2/2001
Ohio Readies for West Nile  *
West Nile virus (WNV) isn't disclosing any secrets about which direction it's headed next, but Ohio is considered to be in its path, and state officials have responded accordingly. A West Nile Virus Workgroup was formed in 2000, and the Ohio Department of Health, The Ohio State University Extension, and other state and federal agencies have been working ... Read full story
 11/1/2001
Florida West Nile Surveillance  *
Spring and summer are when frequent rains encourage mosquito population growth, increasing the risk of arboviruses (diseases spread by arthropod vectors) for equine populations. West Nile virus (WNV) looms as a possible threat, and the state of Florida has been preparing in case the disease arrives in 2001. Florida's Department of Health (FDOH) and ... Read full story
 11/1/2001
West Nile Virus Surveillance  *
West Nile virus (WNV) is in the United States to stay, and horse owners should not assume that exposure is limited to the northeastern part of the country. Forty-eight states, four large cities, and the District of Columbia have applied for and received funding from the federal government for WNV surveillance this year. The initiative state governments ... Read full story
 11/1/2001
West Nile Virus Surveillance Maps Available  *
Web-based maps illustrating results from 2001 West Nile virus (WNV) surveillance will be available through the collaboration of the United States Geological Survey (USGS) and the Centers for Disease Control and Prevention (CDC) on the Center for Integration of Natural Disaster Information's (CINDI) web site. CINDI is a subdivision of USGS that explores ... Read full story
 11/1/2001
West Nile Virus In 18 States & D.C.   *
Since its first appearance in this country in 1999, West Nile virus (WNV) has found its way into the everyday vocabulary of the horse community as it has made its way through 18 states and the District of Columbia. While it's hard to say there is a "latest" development since the status of the disease changes daily, as of Sept. 4, Kentucky became the ... Read full story
 11/1/2001
Clinical Signs of West Nile Virus   *
Nathan Slovis, DVM, an internal medicine specialist at the veterinary firm of Hagyard-Davidson-McGee in Lexington, Ky. diagnosed the first equine case of West Nile Virus (WNV) in Kentucky, and described the clinical signs of the virus to The Horse. The filly first began showing neurologic signs on Aug. 23. Slovis said the filly was "drunk" and looked ... Read full story
 11/1/2001
The Impact of West Nile Virus  *
Before the late summer of 1999, most veterinarians in the United States could not have told you much about West Nile virus (WNV). Most regulatory veterinarians, like myself, only knew that WNV didn't exist in the Western Hemisphere, and it wasn't one of the pathogens we most worried about seeing here in the United States. Foot-and-mouth disease, classical ... Read full story
 11/1/2001
West Nile Virus Migrates to the Southeast   *
The year's first four equine cases of West Nile virus (WNV) in the United States have been confirmed in Florida. Three positive horses were located in Jefferson County, and one was found in bordering Leon County. The United States Department of Agriculture's Animal and Plant Health Inspection Service confirmed the results of the first case July 21. ... Read full story
 11/1/2001
West Nile Virus Found in Ohio   *
At press time, West Nile virus (WNV) had officially arrived in Ohio, according to state and local health officials. The virus was found in a blue jay in Lake County, in northeastern Ohio. This is the farthest west that WNV has been found in the U.S. ... Read full story
 11/1/2001
West Nile Virus Update for 2001  *
Horses in Alabama, Virginia, and Louisiana have been battling West Nile virus (WNV) for the first time since it hit the Western Hemisphere in 1999. In the meantime, veterinarians, public health officials, and horse owners are anticipating the first "killing frost," which will ideally exterminate most of the 2001 mosquito population--and the diseases ... Read full story
 11/1/2001
West Nile Virus Confirmed In Virginia  *
Virginia's Commissioner of Health E. Anne Peterson, MD, MPH, announced on Oct. 13 that a dead crow found in Prince Edward County in Southside Virginia has been confirmed to have West Nile virus. The crow is the first bird to test positive for West Nile virus in the state. No horses or humans have contracted the disease in Virginia. So far, this is ... Read full story
 10/20/2001
West Nile Virus Found in NC Crows, Horses   *
North Carolina's State Public Health Laboratory reported Oct. 9 that West Nile virus (WNV) has been found in two horses in the state. The infected horses were in Hyde County and Camden County (and are not confirmed at national level yet). North Carolina residents can help reduce the health risk from WNV by reporting dead or dying birds to public health ... Read full story
 10/12/2001
West Nile Virus in Arkansas   *
The Arkansas Department of Health and the Livestock and Poultry Commission have reported that one dead Blue Jay in Union County has tested positive at the USGS National Wildlife Laboratory in Madison, Wisconsin for West Nile virus (WNV). This is the first time that the disease has been identified in Arkansas Mosquitoes transmit West Nile Virus directly ... Read full story
 10/12/2001
West Nile Virus Identified in Missouri Birds  *
West Nile virus (WNV) has been identified in five American crows from the St. Louis area. The U.S. Geological Survey National Wildlife Health Center, Madison, Wisconsin, notified the Missouri Department of Health and Senior Services Oct. 5 that the crows tested positive. "The fact that the virus has finally appeared in Missouri really comes as no ... Read full story
 10/12/2001
Equine Cases of West Nile Virus Infection, Jan. 1-Oct. 1, 2001   *
There have been 137 cases of clinical West Nile virus (WNV) infection detected in horses from 11 States. The horses are from: 1 county in Alabama: Dale (Ozark, 2); 2 counties in Connecticut: Hartford (West Granby, 1) and New London (Stonington, 1); 18 counties in Florida: Alachua (Alachua, 1), Baker (Glen St. Mary, 1; Sanderson, 1), Clay (Maxville, ... Read full story
 10/12/2001
Mosquito Wars  *
West Nile virus (WNV) is spreading, and horse owners are asking, "What can I do to protect my horses?" The good news is that a vaccine for horses has been developed and conditionally approved by the USDA. Experts say the WNV vaccine should work like other encephalitis vaccines, which are protective. However, responsible horse owners must take steps ... Read full story
 10/1/2001
2000 Equine West Nile Virus Study Online   *
The United States Department of Agriculture's Animal and Plant Health Inspection Service recently released the final full report for the year 2000 West Nile virus study in horses on the Internet. Highlights of the report can be accessed at www.aphis.usda.gov/vs/ceah/wnvhighlights.pdf. The study was performed in seven states that had confirmed WNV equine ... Read full story
 10/1/2001
Species of Mosquitoes Associated with West Nile Virus in the USA, 2001  *
The following are the species of mosquitoes from which West Nile virus was isolated and/or from which West Nile virus RNA was detected during 2001 (as of Sept. 25). Aedes albopictus Aedes cinereus Aedes vexans Anopheles punctipennis Anopheles quadrimaculatus Coquillettidia perturbans Culex pipiens Culex restuans Culex nigripalpus ... Read full story
 9/28/2001
Suspected Equine West Nile Virus Case In Mississippi  *
Mississippi public health & animal health officials announced the first identification of West Nile Virus in Mississippi on Sept. 19. A horse from western Lee County has been found infected with West Nile virus (WNV) virus by testing performed through the State Veterinary Diagnostic Laboratory. Initial tests on a second horse from the same area ... Read full story
 9/21/2001
Equine Cases of West Nile Virus, Jan. 1-Sept. 19, 2001   *
There have been 110 cases of clinical West Nile virus (WNV) infection detected in horses from 11 States. The States that most recently reported their first equine case(s) in 2001 are: Alabama (Dale County, 2), Massachusetts (Plymouth County, 8), New Jersey (Burlington County, 1), and Virginia (Rockingham County, 1). Alabama and Virginia had never previously ... Read full story
 9/21/2001
West Nile Virus in Alabama Horses  *
Two horses in Dale County, Alabama have been confirmed as positive for West Nile virus (WNV) infection. A positive horse has also been confirmed in Plymouth County, Massachusetts. These are the first equine cases of clinical WNV infection ever detected in Alabama and the first in Massachusetts in 2001; one equine case of WNV infection was detected ... Read full story
 9/21/2001
West Nile Virus Found in Iowa   *
A dead crow found in Scott County has tested positive in preliminary tests for West Nile virus (WNV), marking the first time the virus has been identified in Iowa. Testing of the crow was conducted at the University of Iowa Hygienic Lab with the assistance of the College of Veterinary Medicine at Iowa State University. "There have been no human cases ... Read full story
 9/21/2001
West Nile Virus in North Carolina  *
The North Carolina State Public Health Laboratory yesterday (Sept. 17) confirmed that a dead blue jay found in Cabarrus County is positive for West Nile virus (WNV), the first evidence this year of the disease found in North Carolina. The blue jay was discovered by a Concord resident last month and reported to the Pest Management Section of the Division ... Read full story
 9/18/2001
Tennessee Confirms West Nile Virus at State Level  *
The Tennessee Department of Health announced yesterday (Sept. 17) that nine dead birds found in Shelby County appear to be infected with West Nile virus (WNV) according to preliminary tests. The birds, all blue jays found in zip code areas 38117 and 38119, have been sent to the Centers for Disease Control and Prevention for confirmatory testing. This ... Read full story
 9/16/2001
West Nile Virus Vaccine Information   *
The following information is written with information from Rocky Bigbie, DVM, a representative of Fort Dodge Animal Health. Fort Dodge produces the West Nile virus vaccine. Q: Why should we vaccinate now if adequate protection will be in force after mosquito season? A: Complete protection is not in place until two weeks after the booster, which can ... Read full story
 9/14/2001
West Nile Virus Continues to Affect Humans and Horses  *
Maryland, New Jersey, and Connecticut have now experienced their first human cases of West Nile virus (WNV) for 2001. A 72-year-old male from the Gwynns Falls area of Baltimore City, Md., was announced as positive for WNV on Sept. 6 by the Department of Health and Mental Hygiene (DHMH) Laboratories Administration. Confirmation is pending from the U.S. ... Read full story
 9/14/2001
Western Influences  *
DATELINE JERUSALEM: "The Israeli Health Ministry has officially designated the outbreak of western Nile River fever as an epidemic. Since the beginning of the outbreak, 13 people have died and 61 are being treated in hospitals..." source Jerusalem Post via Associated Press. What Israel calls western Nile River fever is the same virus with which we ... Read full story
 9/13/2001
West Nile--It's Only Just Begun  *
West Nile virus is beginning to peek out from the mysterious hiding places where it overwintered since an outbreak in late 1999. Five additional birds have been found dead with the virus-- four in New York, and one in New Jersey. Officials believed the virus was present in sentinel chicken flocks in Delaware, but the discovery was a false alarm. West ... Read full story
 9/13/2001
Fact or Opinion?  *
No doubt about it, West Nile is a nasty disease. It causes neurologic problems in humans and horses, and has led to deaths in several species. Since the United States never dealt with West Nile before last year, it's even scarier than some of the more common deadly diseases that we face every year; but it shouldn't be. The human flu kills an average ... Read full story
 9/13/2001
West Nile Firsthand  *
September 2, 2000, Clayton, Delaware The shrill ring of the phone announced a call from Tanja Hanyi, DVM, my partner in veterinary practice some years ago. "Hey! Guess what? I think I've got a West Nile case!" she said excitedly. No mistaking it, she was wound up tight about something in South Jersey. I was skeptical. Tanja was known for sensationalizing ... Read full story
 9/12/2001
West Nile Virus Identified in Illinois in Birds  *
Equine veterinarians from across the globe will gather in San Diego, Calif., for the American Association of Equine Practitioners (AAEP) 47th Annual Convention, Nov. 24-28. More than 2,500 practitioners attend the convention each year, making it the largest equine veterinary meeting in the world. Nearly 100 scientific sessions highlight this year's ... Read full story
 9/7/2001
West Nile Virus Confirmed in Wisconsin Crows  *
Scientists from the U.S. Geological Survey (USGS) in Madison, Wisc., have confirmed one case of West Nile virus (WNV) in a crow found near Milwaukee. Results for a second bird found near Milwaukee are inconclusive and that bird is being retested. Wisconsin health officials announced the finding on Friday, August 31, 2001. The crows were sent to the ... Read full story
 9/7/2001
Equine Case of West Nile Virus in Louisiana  *
The first known equine case of West Nile virus (WNV) in Louisiana has been confirmed in a horse in Vermilion Parish. Tests on the horse were conducted and confirmed by the National Veterinary Services Laboratory in Ames, Iowa, and the positive test was announced Sept. 4. “With this confirmed case in our equine population, it is imperative that horse ... Read full story
 9/7/2001
Confirmed Equine West Nile Virus Case In Connecticut  *
One horse has been confirmed as positive for West Nile virus infection in West Granby, CT. More information is available at http://dep.state.ct.us/mosquito/domanimal.aspx. ... Read full story
 9/7/2001
Kentucky Leaders Meet To Discuss West Nile Virus  *
Researchers, government officials, and private practitioners who are members of the Emerging Diseases Committee met at the Kentucky Livestock Disease Diagnostic Center for nearly two hours to discuss how to handle information dissemination to veterinarians and horse owners on West Nile virus (WNV) in Kentucky. The appearance of WNV in the state was ... Read full story
 8/31/2001
Mosquito Control Measures  *
West Nile virus (WNV) is spreading. Horse owners are asking, "What can I do to protect my horses?" Thegood news is that a vaccine for horses has been developed and approved by the USDA. Experts say the WNV vaccine should work like other encephalitis vaccines, which are protective. However, responsible horse owners must take steps to prevent the disease ... Read full story
 8/31/2001
First Kentucky Horse With WNV Recovering  *
The first horse confirmed to have West Nile virus (WNV) in Kentucky is a 3-year-old Quarter Horse filly which was bred and raised in Bourbon County, Kentucky. Bourbon County is northeast of Lexington, and Paris is one of the largest cities in the county. Dr. Nathan Slovis, an internal medicine specialist at the veterinary firm of Hagyard-Davidson-McGee ... Read full story
 8/31/2001
West Nile Virus In Kentucky Horse  *
The Kentucky Department of Agriculture (KDA) reported today that Kentucky’s first case of West Nile virus (WNV) has been identified in the state. A horse was tested positive in Bourbon County, which is in the Bluegrass region of Central Kentucky. The National Veterinary Services Laboratory earlier today notified Kentucky State Veterinarian Don Notter, ... Read full story
 8/31/2001
West Nile Virus Found in Alabama   *
West Nile virus (WNV) has officially made it to Alabama. Jefferson County health officials reported on Monday that the virus was confirmed in two dead birds. There have been no human or horse cases confirmed in the state. The Birmingham News quoted Dr. Carole Samuelson, Jefferson County Department of Health director."This report is not unexpected, ... Read full story
 8/31/2001
Suspected Equine Case of West Nile Virus in Connecticut  *
The State of Connecticut Mosquito Management Program announced Aug. 24 that a horse in West Granby has exhibited clinical signs consistent with West Nile virus (WNV) infection and preliminary laboratory results indicate a recent exposure to the virus. Additional testing is underway to confirm the diagnosis. Consistent with the State West Nile Virus ... Read full story
 8/31/2001
West Nile Virus Positive Numbers Climb in Canada  *
According to Health Canada, the number of West Nile virus-positive birds from Canada has been climbing since initial confirmation on Aug. 23 in a crow found Aug. 8 near Windsor in Ontario. This crow was the first of the 1391 birds tested as of that time in Canada to be confirmed WNV-positive. By Aug. 27, eight crows and two blue jays had been confirmed ... Read full story
 8/31/2001
Florida's Fourth Human West Nile Virus Case Confirmed  *
The Florida Department of Health announced Aug. 24 that the fourth human encephalitis case caused by the West Nile virus (WNV) has been confirmed. The case is a 73-year-old woman from Sarasota County, who is believed to have contracted the disease while visiting Marathon in the Florida Keys last month. A medical alert is now in effect for Monroe County. According ... Read full story
 8/31/2001
Florida's Third Human Case of West Nile Virus Reported  *
The Florida Department of Health announced Monday that a third human case of encephalitis caused by the West Nile virus (WNV) has been diagnosed. The case is a 40-year-old man from Jefferson County. There have been two other confirmed human cases of WNV and two confirmed cases of Eastern equine encephalitis (EEE) in Florida. Jefferson County is already ... Read full story
 8/24/2001
Equine West Nile Virus Case in Pennsylvania  *
Pennsylvania’s Health Secretary Robert S. Zimmerman Jr. announced Aug. 15 that West Nile virus had been confirmed in a horse at Philadelphia Park in Bensalem, Bucks County. According to a United States Department of Agriculture Emergency Warning, “the horse in Pennsylvania is a 3-year-old filly that is recovering from her illness. A definitive date ... Read full story
 8/24/2001
West Nile Virus Found in Central Indiana  *
A crow found in southeastern Marion County is the first positive indicator that West Nile virus (WNV) has officially arrived in Indiana. State health officials say that although this is the first time WNV, which is transmitted by mosquitoes, has been identified in the state, it is not unexpected. No human cases have been found in Indiana. "This is ... Read full story
 8/24/2001
West Nile Virus Continues to Spread  *
Preliminary tests suggest that West Nile virus might be living in Canada. The virus that first appeared in the Western Hemisphere in 1999 was detected recently in a bird in Louisiana and in humans in Georgia and New York. Georgia also had its first equine WNV case, bringing the U.S. equine case total to 36 confirmed this year. Canada’s Windsor Star ... Read full story
 8/24/2001
Are You Ready For West Nile?  *
The dog days of summer are here, and if weather patterns hold true, it will be hot and humid over a large area of the country. And if disease patterns hold true, humans and horse owners are starting the worst time of year for West Nile. Even though this disease will appear in many places this fall for the first time in U.S. history, the range of preparation ... Read full story
 8/18/2001
West Nile Virus Confirmed in Louisiana   *
The first presence of West Nile virus (WNV) in Louisiana has been confirmed by the LSU School of Veterinary Medicine’s Arbovirus Testing Laboratory (ATL) and by the Centers for Disease Control and Prevention (CDC). The ATL is part of the Louisiana Veterinary Medical Diagnostic Laboratory, which is funded by the Louisiana Department of Agriculture and ... Read full story
 8/17/2001
West Nile Virus Found In Ohio  *
A bluejay in northeastern Ohio is the first positive indicator that West Nile virus (WNV) has arrived in Ohio, according to state and local health officials. No horse or human cases have been found. While this is the first time WNV, a viral disease transmitted by mosquitoes, has been identified in the state, it is not unexpected. "This is no surprise. ... Read full story
 8/3/2001
West Nile Virus Vaccine Released  *
The equine industry called out for a way to protect its horses from the deadly neurological disease West Nile virus (WNV), and researchers and federal authorities responded. The United States Department of Agriculture (USDA) and Fort Dodge Animal Health announced on Aug. 1 the approval and release of the very first WNV vaccine for horses. The virus ... Read full story
 8/2/2001
Georgia Horse Succumbs to West Nile Virus  *
Georgia’s first confirmed case of a horse infected with West Nile Virus (WNV) has prompted Georgia Commissioner of Agriculture Tommy Irvin to seek an earlier shipment of the vaccine recently approved by the United States Department of Agriculture (USDA). (Visit http://www.thehorse.com/ViewArticle.aspx?ID=1109.) "We have contacted the manufacturer ... Read full story
 8/1/2001
D.C. Reports Additional West Nile Virus-Positive Birds   *
The D.C. Department of Health has announced that an additional twelve crows have tested positive for West Nile virus (WNV), bringing the total number this year in the District to 22. The crows were found between August 6th and August 9th in the Northeast quadrant of the city. The first bird tested positive on July 16th. The Department has stepped ... Read full story
 8/1/2001
West Nile Virus Virus-positive Crow Found in Virginia  *
Virginia's Commissioner of Health E. Anne Peterson, MD, MPH, announced Tuesday, July 24, that a dead crow found in Alexandria has been confirmed as having West Nile virus. The crow is the first bird to test positive for West Nile virus in the state of Virginia this year. "State and local governments will continue to collaborate and monitor the situation ... Read full story
 7/27/2001
Florida Has Year's First Equine West Nile Virus Case  *
The first equine case of West Nile virus (WNV) in the United States this year has been confirmed in a Florida horse. The horse was located in Jefferson County, Florida, where WNV-positive crows were found in June. The United States Department of Agriculture’s Animal and Plant Health Inspection Service confirmed the results July 21 at its National Veterinary ... Read full story
 7/25/2001
West Nile Virus Confirmed In Florida  *
West Nile virus (WNV) has been confirmed in a dead crow in Jefferson County, Fla. The crow was submitted for testing on June 18, and results were released July 6. The disease, which is spread by the bite of an infected mosquito, made its debut in the Western Hemisphere in birds, horses, and humans in the late summer of 1999 in New York. It has survived ... Read full story
 7/11/2001
West Nile Virus 2001  *
On May 7 it was announced that West Nile virus (WNV) had returned to the northeastern United States--this time in dead crows in New Jersey. But the area wasn't as panicked as it had been the past two years the disease was found. State vector-borne disease units and veterinary officials in the Northeast and down the East Coast now are veterans of WNV ... Read full story
 7/1/2001
"In the News" Seminar  *
An attentive audience gathered to learn more about foot and mouth disease (FMD), West Nile virus (WNV), and equine protozoal myeloencephalitis (EPM) from experts on Friday, April 27, at the Kentucky Horse Park in Lexington, Ky. Peter Timoney, FRCVS, PhD, Head of the Gluck Equine Research Center in Lexington, Ky., and William Saville, DVM, PhD, Dipl. ... Read full story
 7/1/2001
LSU's Vet Diagnostics Lab Helps Monitor Vector-borne Diseases  *
As mosquito and other insect populations increase during the summer months, so do epidemics of diseases carried by those insects, including the deadly equine encephalitis. But researchers at LSU are working to curb the spread of vector-borne diseases, or diseases transmitted by insects and other organisms. The Arbovirus Testing Laboratory in the LSU ... Read full story
 6/29/2001
Update On The Status of West Nile Virus Surveillance Mapping for 2001  *
The National Atlas of the United States of America will not be producing West Nile maps in 2001, however, another component of the U. S. Geological Survey (USGS), the Center for Integration of Natural Disaster Information (CINDI), will be producing West Nile virus surveillance maps for 2001. According to Stephen C. Guptill, PhD, a USGS Senior Research ... Read full story
 6/22/2001
West Nile Virus Found In Rhode Island Birds  *
Rhode Island's Department of Environmental Management has announced two crows have tested positive for West Nile Virus. The crows were collected from Charlestown and Warwick last week and are the first to test positive in Rhode Island this year. More than a dozen birds have tested positive in other Northeast states this year to date. Under the state's ... Read full story
 6/8/2001
Massachusetts West Nile Information Line Opens  *
The Massachusetts Department of Public Health's West Nile virus information line opened on June 1. If you are a Massachusetts resident and wish to speak with someone concerning WNV during business hours, or leave a telephone message concerning a dead bird report, please call the line at 866/ MASS-WNV (627-7968). ... Read full story
 6/8/2001
More West Nile Virus Findings In New Jersey  *
Two crows collected in Edison, New Jersey, May 22 and 24 tested positive for West Nile Virus (WNV). To date, 118 crows and 1 hawk have been tested by the N.J. Department of Health and Senior Services' Public Health and Environmental Laboratory. Of those, 11 crows found in Bergen and Middlesex Counties have tested positive for the presence of the West ... Read full story
 6/1/2001
Maryland Crow Tests Positive For West Nile Virus  *
The Maryland Department of Health and Mental Hygiene (DHMH) Laboratories confirmed May 24 that a crow found in Baltimore City tested positive for the West Nile Virus (WNV). This first confirmed crow of the 2001 season was found in the 3100 block of Gibbons Avenue in the northeast section of the city. In 2000, 50 birds that tested positive were found ... Read full story
 6/1/2001
International West Nile Conference  *
As mosquito populations began another season of activity, scientists met for the International Conference on West Nile Virus (WNV) in White Plains, N.Y. Individuals from as far away as Israel, Romania, Russia, France, and South Africa joined researchers from the United States and public health officials April 5-7 to discuss the history of WNV, current ... Read full story
 6/1/2001
Dead Crow Found In Milford, Connecticut Tests Positive For West Nile Virus  *
From the Connecticut Department of Environmental Protection (DEP) On May 23, the State Mosquito Management Program announced the first bird positive for West Nile virus (WNV) in Connecticut, submitted from Milford and tested through the State’s bird surveillance system. The City of Milford has a comprehensive mosquito control program that includes ... Read full story
 5/25/2001
AVMA Wants Legislation Preparing For Foreign Animal Disease Outbreaks  *
The AVMA is working with officials in Washington, DC, to draft legislation outlining procedures for preventing the introduction of a foreign animal disease in North America, and a well-coordinated emergency response plan to be implemented in the event of an outbreak. The Executive Board authorized the initiative.The Association sees this as a necessary ... Read full story
 5/25/2001
West Nile Virus Found In New Jersey  *
Two crows found in New Jersey have tested positive for the presence of the West Nile virus (WNV), Health and Senior Services Commissioner Christine Grant announced Monday. Twenty-two birds have been tested so far this season by the New Jersey Department of Health and Senior Services. The 21 crows and one hawk submitted for testing came from 14 counties ... Read full story
 5/1/2001
Contagious Critters  *
Diseases from other animals pose a constant threat to our horses. Disease-causing agents, or pathogens, lurk in local wildlife, fly overhead in birds, and lay in the next field inside cows peacefully chewing their cuds. These disease agents--whether fungi, bacteria, or viruses--are just waiting for the opportunity to cross over into a horse. The diseases ... Read full story
 5/1/2001
Hear The Latest On FMD, EPM, and WNV  *
Tonight The Horse: Your Guide To Equine Health Care will conduct a free seminar for horse owners and industry professionals addressing EPM, West Nile, and Foot and Mouth disease concerns. The seminar is at the Kentucky Horse Park Visitor's Information Center from 5-7 pm. The seminar coincides with the Rolex Kentucky Three-Day Event at the horse park. ... Read full story
 4/27/2001
The Latest From Experts on FMD, EPM, and WNV  *
The Horse: Your Guide To Equine Health Care will conduct a free seminar for horse owners and industry professionals addressing EPM, West Nile, and Foot and Mouth disease concerns. The seminar will be Friday, April 27, 2001, at the Kentucky Horse Park Visitor's Information Center from 5-7 pm. The seminar coincides with the Rolex Kentucky Three-Day Event ... Read full story
 4/20/2001
Pennsylvannia Launches West Nile Surveillance Program  *
Pennsylvania’s West Nile virus (WNV) surveillance program was launched April 9 with the help of officials from the Departments of Health, Environmental Protection, and Agriculture, and the Cumberland County Commissioners. A demonstration of the equipment used to trap mosquitoes and agents used to control mosquito larvae followed presentation of the ... Read full story
 4/13/2001
In The News: A Free Seminar For Horse Owners  *
A free seminar for horse owners and industry leaders about the latest on EPM, West Nile, and Foot and Mouth Disease will be presented Friday, April 27, 2001 at the Kentucky Horse Park Visitor's Information Center from 5-7 pm. The seminar will coincide with the Rolex Kentucky Three-Day Event. Featured speakers include Dr. Bill Saville of The Ohio State ... Read full story
 4/6/2001
West Nile Virus Update for 2000  *
The United States Department of Agriculture (USDA) has released a list of additional equine cases of West Nile Virus for the year 2000. There were 2 additional equine clinical cases of West Nile virus (WNV) infection confirmed during the period from Dec. 2, 2000 to Jan. 15, 2001—one each from New Jersey and New York. Both had clinical onset during ... Read full story
 2/2/2001
EDQ West Nile Update  *
Equine Disease Quarterly, a publication funded by Underwriters At Lloyd's of London, Brokers, And Their Kentucky Agents have published a West Nile Summary for 2000, complete with maps on the Internet. Visit http://www.uky.edu/Agriculture/VetScience/q_jan01/q_jan01.htm, and click on “West Nile Update – 2000” in the left frame. ... Read full story
 2/1/2001
WNV Case Definition  *
"Probable," "presumptive," "suspected," and "confirmed." All of these words are used to describe equine disease cases tested for West Nile virus (WNV). The cases are "confirmed" on a local, state, or national level. What do these descriptions mean, and why don’t the totals reported by state and national agencies always match? "It is easy to get confused ... Read full story
 1/1/2001
WNV Vaccine in Progress  *
Fifty-nine equine cases of West Nile virus (WNV) were confirmed last year in the Northeast. Officials at Fort Dodge Animal Health’s laboratories in Kansas City, Mo., have been working diligently to develop a WNV vaccine for veterinary use, and potentially help prevent the virus from appearing in horses in 2001. West Nile made its Western Hemisphere ... Read full story
 1/1/2001
West Nile Update  *
West Nile virus is beginning to peek out from the mysterious hiding places where it overwintered since an outbreak in late 1999. Five additional birds have been found dead with the virus-- four in New York, and one in New Jersey. Officials believed the virus was present in sentinel chicken flocks in Delaware, but the discovery was a false alarm. West ... Read full story
 1/1/2001
Florida Gears Up for West Nile Virus  *
Seasoned with the experience of handling Eastern encephalitis (EE, formerly known as Eastern Equine Encephalitis, or EEE) and St. Louis encephalitis (SLE) outbreaks, the state of Florida is preparing a strong defensive line to protect its citizens, both horses and humans, against West Nile virus (WNV). While there is no evidence WNV has reached Florida, ... Read full story
 1/1/2001
West Nile Studies Begin  *
The mysteries of West Nile virus are being uncovered at Colorado State University (CSU), thanks to a joint effort of the United States Equestrian Team (USET), the Centers for Disease Control (CDC), and the United States Department of Agriculture (USDA). West Nile virus, which is a type of encephalitis thought to be spread by the bite of an infected ... Read full story
 1/1/2001
One More Human West Nile Case In NJ  *
Laboratory testing and analysis completed last week by the federal Centers for Disease Control and Prevention (CDC) have confirmed that a fifth New Jersey resident was infected with the West Nile virus (WNV) this past summer. The resident, a 76 year-old Dover Township (Morris County) woman with underlying medical conditions, was admitted to St. Clare's ... Read full story
 12/29/2000
State Agencies Ask Floridians To Look For West Nile Virus  *
The Florida Departments of Health (DOH), Agriculture and Consumer Services (FDACS), and the Fish and Wildlife Conservation Commission (FWCC) are asking Floridians to help determine if West Nile virus (WNV) arrives in the state. Dead bird surveillance has proven to be an early indicator of WNV in other states. The public is encouraged to report dead ... Read full story
 12/15/2000
USGS Researchers: West Nile Moves Bird-to-Bird  *
Scientists from the U.S. Geological Survey said recently that the West Nile Virus can be transmitted from bird-to-bird in a confined laboratory setting. It had been thought that the virus was only transmitted through mosquito bites. Scientists from the USGS National Wildlife Health Center in Madison, Wisc., placed infected birds in the same biocontainment ... Read full story
 11/27/2000
European Union Increases Equine Import Restrictions   *
The European Commission of the European Union (EU) has notified the United States Department of Agriculture (USDA) Animal and Plant Heath Inspection Service (APHIS) that import restrictions have been expanded to horses from Pennsylvania due to West Nile virus (WNV). These restrictions are an extension of those previously in effect for horses from ... Read full story
 11/10/2000
Two More West Nile Birds Found In Virginia   *
Virginia's Commissioner of Health E. Anne Peterson, MD, MPH, reported Tuesday that two more crows have tested positive for West Nile virus (WNV) in Virginia. The two crows were found in Fairfax and Spotsylvania Counties. The total number of crows testing positive for WNV in the state is now four. No cases of WNV have been confirmed in mosquitoes, horses, ... Read full story
 11/10/2000
Another West Nile Horse In Connecticut  *
The State yesterday (Oct. 26) announced a seventh case of WNV in a horse. The horse, from Glastonbury, is recovering, and its stable mates have shown no signs of sickness. No spraying is planned, and mosquito trapping will conclude on October 27, with test results available the week of November 7, 2000. Bird collection and reports of dead bird sightings ... Read full story
 10/27/2000
West Nile Virus Found in North Carolina  *
The U.S. Geological Survey, National Wildlife Health Center, confirmed Oct. 20 that a dead crow found in North Carolina is positive for West Nile Virus, the first evidence of the disease found in the state. The crow was found September 27 at Jordan Lake State Park in Chatham County by a conservation biologist with the U.S. Army Corps of Engineers. ... Read full story
 10/27/2000
First Human WNV Case Confirmed In Connecticut  *
The State of Connecticut Department Public Health (DPH) yesterday announced the first confirmed instance of WNV infection in a Connecticut resident from Norwalk. DPH confirms a female from Norwalk experienced only several days of headache without other symptoms and was not hospitalized. Based on timing of headache and test results, she was most likely ... Read full story
 10/20/2000
Connecticut Horse Tests Positive For West Nile Virus  *
On October 11, 2000, the State of Connecticut confirmed a horse testing positive for West Nile Virus (WNV) in Cheshire. This is the fifth horse testing positive for WNV in Connecticut this year. The owner reported the onset of clinical signs on September 17, 2000. A veterinarian saw the horse on September 20 and a serum sample was collected that day ... Read full story
 10/13/2000
Pennsylvania Horse Dead From West Nile  *
The Pennsylvania Department of Health announced Wednesday that the West Nile virus (WNV) has been found in a horse in East Hanover Township, Dauphin County. This is the first confirmed case of West Nile infection in a Pennsylvania horse. An infected horse does not transmit the virus to people and does not pose a threat to other horses or people who ... Read full story
 10/6/2000
10 Horses Dead From West Nile  *
West Nile virus (WNV) has topped headlines in the Northeast for the better part of 2000, and now has sickened at least 15 horses in the states of Connecticut, New York, New Jersey, Massachusetts, and Rhode Island. As the magazine went to press, only five of those horses were recovering; the others died or were euthanized. Officials are familiarizing ... Read full story
 10/6/2000
Two More West Nile Birds In Pennsylvania  *
Pa. State officials yesterday (Sept. 28) confirmed that dead crows in Southampton, Bucks County, and Lansdowne, Delaware County, have tested positive for West Nile virus, bringing the total infected birds in the state to four. Laboratories in the state departments of Agriculture and Health performed tests to confirm the results. The Bucks County ... Read full story
 9/29/2000
Three More NY Horses Test Positive For West Nile  *
New York's Agriculture Commissioner Nathan L. Rutgers announced Tuesday that three horses in the Middletown area of Orange County have tested positive for WNV. One 16-year-old horse was euthanized on Sept. 7 and two horses are currently recovering from the disease. “The bad news is that three more horses have tested positive with this deadly disease,” ... Read full story
 9/29/2000
Two New Human West Nile Virus Cases In NJ, One Reported Death  *
Equine Cases On The Rise Two more New Jersey residents have tested positive for the presence of West Nile virus (WNV). The new cases include an 82-year old Little Falls man who died in September, and a 72-year old Bayonne woman who is home recovering. The Little Falls man is the first person with WNV to die this year in the United States. He became ... Read full story
 9/29/2000
West Nile Confirmed In Maryland Crows  *
The Maryland Department of Health and Mental Hygiene's (DHMH) lab has confirmed that two crows found in Baltimore and Howard counties have tested positive for West Nile virus (WNV). The first crow was found in Relay on Sept. 13; the second crow was found in Columbia on Sept. 15. Between Sept. 14 and Sept. 20, the State lab performed a series of ... Read full story
 9/22/2000
EU Places Import Restrictions  *
The European Commission of the European Union (EU) has notified the United States Department of Agriculture (USDA) Animal Plant Health Inspection Service (APHIS) that import restrictions have been placed on horses from Connecticut, Massachusetts, New Jersey, New York, and Rhode Island due to West Nile Virus. Effective Sept. 15, a supplementary certificate ... Read full story
 9/22/2000
New York City Free of West Nile Virus   *
New York City Health Commissioner Neal L. Cohen, M.D. has announced that the blood sample from the chicken being monitored by the Health Department in Corona, Queens (see News & Notes for the week of June 16), has not been confirmed for the West Nile Virus by the U.S. Centers For Disease Control and Prevention or the National Veterinary Laboratory ... Read full story
 6/1/2000
New York City Sentinel Chicken Positive for West Nile In Preliminary Tests   *
Fifth Bird In New England Found Positive This Year New York City Health Commissioner Neal L. Cohen, M.D., announced Thursday that a blood sample taken on June 8 from a chicken being monitored by the Health Department in Corona, Queens, has been preliminarily found to be positive for the West Nile virus. The test on the chicken was performed at the ... Read full story
 6/1/2000
West Nile Appears Again   *
West Nile virus is beginning to peek out from the mysterious hiding places where it overwintered since an outbreak in late 1999. Three birds have been found dead with the virus—two in New York, and one in New Jersey. Two crows in New York were an adult male and female found on May 22 , and were submitted from the same area in Rockland County. The ... Read full story
 6/1/2000
Pennsylvania Educates Horse Owners On West Nile Virus   *
The West Nile encephalitis committee at Penn State has developed an information sheet for the horse owners in Pennsylvania. The information distributed follows. To see The Horse's most recent articles on West Nile, please scroll down to a list of links at the end of this article. The original information sheet was posted the week of May 19, 2000. ... Read full story
 5/1/2000
West Nile Virus Meeting   *
The USET and Stadium Jumping in conjunction with the Florida Division of the Animal Industry are sponsoring a meeting in Wellington, FL on December 20, 1999 to discuss the West Nile Virus and its effect on the equine. Nationally recognized speakers will present practical aspects of dealing with the WNV. Interested parties should contact Bill Barnes ... Read full story
 12/10/1999
Summary Of West Nile Virus In The United States  *
Courtesy of USDA, APHIS, Veterinary Services, Emergency Programs Infectious Disease Table Topics, AAEP Convention (Report of November 18, 1999) West Nile Virus (WNV) has been identified in birds, mosquitoes, people, and horses in a limited area of the northeastern United States. Specifically, this area consists of parts of Connecticut, New York, ... Read full story
 12/10/1999
Europe Bans Import Of U.S. Horses Originating In WNV-Affected Areas  *
Last minute negotiations between the U.S. Department of Agriculture and the European Commission have failed to stop a ban on the importation of U.S. horses from New York, Connecticut and New Jersey into Europe. The American Horse Council learned last week that the European Union planned to institute a total ban on the importation of horses from the ... Read full story
 11/5/1999
United Arab Emirates Restrict Imports Due To West Nile Virus   *
The United Arab Emirates has announced that all horses exported to the UAE from the US must be accompanied by a supplementary health certificate. The certificate guarantees that the horse has not been resident on premises in New York State within the 14 days immediately prior to export. Upon written declaration from the owner or agent of the horse, ... Read full story
 10/21/1999
West Nile Virus Q & A with Peter Timoney, FRCVS, PhD  *
Peter Timoney, FRCVS, PhD, is head of the Gluck Equine Research Center in Kentucky and one of the world's leading authorities on equine infectious disease. Q: What is West Nile encephalitis? Inflammation of the central nervous system (brain and spinal cord) caused by a mosquito-borne virus named West Nile virus. This virus was first identified ... Read full story
 10/21/1999
The Latest West Nile Virus Update  *
Twenty-one of the cases of West Nile virus (WNV) in horses were handled and treated by the Mattituck-Laurel Veterinary Hospital, in Laurel, N.Y. Of those 21, eight have died or were euthanized. An additional horse, a Thoroughbred, might be euthanized tonight, following intensive exam by the United States Department of Agriculture. John E. Andresen, ... Read full story
 10/21/1999
West Nile Virus Confirmed (no longer "-like")  *
According to the United States Department of Agriculture, the unique disease outbreak in NY horses is no longer the "West Nile-like" virus. It now has been confirmed as the actual West Nile virus. Centers for Disease Control have not yet issued a statement that would confirm West Nile virus in the dead birds found in CT and NJ. More reports and ... Read full story
 10/21/1999
Hong Kong Temporarily Suspends Import Of Horses From North America  *
10:00 a.m., EST According to an Excite Sports report (www.sports.excite.com), the Hong Kong Jockey Club said on Wednesday, Oct. 20, it was temporarily suspending the import of horses from North America due to the outbreak of West Nile-like encephalitis in New York. "This is a precautionary measure to prevent the possibility of the virus responsible ... Read full story
 10/21/1999
West Nile Virus 1999 Update  *
The U.S. Department of Agriculture and the Centers for Disease Control and Prevention yesterday confirmed that in Suffolk County, NY, at least one dead horse tested positive for the West Nile-like virus. Another 10 horses that displayed symptoms have confirmed West Nile-like antibodies. Additional tests on the tissue samples from the other dead horses, ... Read full story
 10/21/1999
West Nile-Like Virus Confirmed In NY, Suspected in NJ, Conn.   *
Determined To Be The Cause Of Human And Equine Illnesses In New York City For the first time, West Nile virus--or a new subtype of that virus--has been confirmed in humans and horses in the United States. The outbreak of encephalitis-like sickness in humans in New York City now has been verified as caused by West Nile virus. This is the first confirmed ... Read full story
 10/19/1999
USDA Takes Action On West Nile Virus   *
According to a USDA Animal and Plant Health Inspection Service press release from Oct. 13, the U.S. Department of Agriculture is taking several steps to ensure that the West Nile virus (WNV) does not have a detrimental effect on American agriculture. The veterinary services program of USDA's Animal and Plant Health Inspection Service is developing ... Read full story
 10/14/1999




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