West Nile Virus (WNV)


Kentucky Reports First Equine West Nile Virus Case of 2008

September 18, 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... Read More


Tennessee Officials Urge Horse Owners to Protect Against EEE

August 30, 2008

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... Read More


Infectious Disease in Horses

August 15, 2008

Equine authorities discussed numerous infectious disease topics and studies during the 2007 AAEP Convention.... Read More


Wisconsin Horses Positive for EEE, WNV

August 12, 2008

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... Read More


WNV Reported in Washington Horses

August 05, 2008

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).... Read More


West Nile Incidence and Vaccination, 1999-2007

July 27, 2008

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... Read More


New Mexico Horse Tests Positive for West Nile Virus

July 20, 2008

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... Read More


Iowa State University Vets: Protect Horses from WNV

July 07, 2008

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 Augus... Read More


First California Equine WNV Case of 2008 Reported

June 24, 2008

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... Read More


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