West Nile Virus (WNV)


South Dakota Horse Owners Reminded to Vaccinate Against WNV

May 22, 2008

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... Read More


Vaccination Schedule Guidelines

April 21, 2008

Developing a vaccination schedule is not as straightforward as it sounds. So much of what you should vaccinate for depends upon such factors as where you live, how often your horse travels, how old he is, his vaccination history, and what infectious ... Read More


West Nile Virus 'Hot Spots' Identified in Texas

April 10, 2008

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... Read More


West Nile Virus: Threat and Response

April 04, 2008

In 1999 one in three equines that contracted West Nile virus in North America died due to naïve immune systems... Read More


Florida Official Urges EEE Vaccination; 9 Deaths Reported

March 21, 2008

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.... Read More


Dealing with Emerging Infectious Diseases

March 05, 2008

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 (abl... Read More


Antibodies to WNV Common in Arab Emirate Horses

January 18, 2008

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 Centra... Read More


Study: Light-Colored Horses at Higher Risk of Dying from West Nile Virus

January 03, 2008

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... Read More


New Variables Identified as West Nile Risk Factors

December 22, 2007

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... Read More


Two New West Nile Virus Cases in Kentucky

October 30, 2007

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... Read More


Mississippi State Reports Surge in EEE, WNV Cases

October 15, 2007

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... Read More


Understanding West Nile Virus

October 02, 2007

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Wisconsin Horse Positive for West Nile Virus

September 29, 2007

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... Read More


WNV: Montana, California Leading Country in Equine Cases

September 19, 2007

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... Read More


Equine West Nile Virus Case Reported in Kentucky

September 15, 2007

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,... Read More


UC Davis: Gene Mutation Turned WNV into Killer Disease among Crows

August 21, 2007

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 Universit... Read More


WNV, EEE Found in Massachusetts Mosquitoes

August 10, 2007

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 MP... Read More


West Nile Virus Claims South Dakota Horse

August 05, 2007

West Nile virus has killed a horse in Meade County, S. D.

This is South Dakota's first horse fatality from the disease since 2005,... Read More


California Declares WNV Emergency in Three Counties

August 03, 2007

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... Read More


Oklahoma Horse Owners Urged to Vaccinate Animals Against WNV

July 28, 2007

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... Read More


Two Montana Horses Contract WNV

July 28, 2007

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... Read More


CDC: Human West Nile Virus Cases Off to a Fast Start

July 27, 2007

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.... Read More


Equine Cases of EEE and WNV Confirmed in Virginia

July 26, 2007

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 illnes... Read More


Texas: Water Everywhere Raises Risk of Livestock Disease

July 16, 2007

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... Read More


Flooded Plains States: Drying Out, Bracing for Mosquito-Borne Equine Diseases

July 12, 2007

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... Read More