West Nile Virus (WNV)


EEE Outbreaks Taper as Temperatures Cool

November 20, 2010

Mosquito-borne illness in horses has been a hot topic this summer with several states reporting a record number of positive test results for Eastern equine encephalitis (EEE). ... Read More


The War On Microbes (Emerging Equine Diseases)

November 01, 2010

In the face of potentially disastrous global warming events, pathogenic microscopic organisms appear to be on a mission to impact the surviving species. Bacteria, viruses, fungi, and parasites are rapidly adapting to... Read More


Readers are Knowledgeable about WNV Vaccines

September 21, 2010

More than 390 readers of TheHorse.com responded to a poll asking, "Do you know which WNV or WNV-combo vaccine your horse gets?" ... Read More


Behavior Changes in West Nile Virus Survivors

September 20, 2010

I've heard some horses have been reported to have very different personalities after having West Nile. ... Read More


WNV: Second Kentucky Horse Confirmed, Euthanized

September 10, 2010

This week veterinarians confirmed Kentucky's equine West Nile virus (WNV) case of 2010. The 6-year-old Morgan stallion, located in Shelby County just southeast of Louisville, was found down and unable to rise and was later euthanized.... Read More


WNV Confirmed in Kentucky Horse

August 20, 2010

A horse in Taylor County, just east of Louisville, Ky., has been diagnosed and treated for West Nile virus (WNV), according to officials at the Kentucky State Veterinarian’s Office. The horse was presented to a veterinarian with mild atax... Read More


WNV and EEE: Massachusetts Horse Owners Urged to Vaccinate

August 09, 2010

Massachusetts state officials have urged horse owners to vaccinate their horses against West Nile virus (WNV) and Eastern equine encephalitis (EEE) after a second horse was euthanized last week. This was the first case of EEE in Worchester County si... Read More


Vaccinating for West Nile Virus at High Altitudes

July 18, 2010

I live at almost 8,000 ft in the mountains of Colorado. As far as I know, we have yet to have a case of West N... Read More


EEE: Two Horses Confirmed in Georgia

July 09, 2010

Just one week after the Florida Agriculture and Consumer Services Commissioner announced a spike in Eastern Equine Encephalitis (EEE) cases, the Georgia Division of Public Health has confirmed two positive cases of EEE in horses found in Brooks Count... Read More


EEE: Florida Horse Owners Cautioned about Spike in Cases

June 30, 2010

Florida horse owners are being urged by Florida Agriculture and Consumer Services Commissioner Charles Bronson to get their animals vaccinated following an upsurge in the number of Eastern Equine Encephalitis (EEE) cases.

According t... Read More


WNV: Gene Might Figure in Horses' Ability to Fight Virus

June 02, 2010

Mutations in the gene called OAS1 contribute to a horse's ability to fight West Nile Virus (WNV), reported a group of researchers led by David Adelson, PhD, Professor and Chair of Bioinformatics and Computational Genetics from the Universit... Read More


Vaccination Basics For Horses

June 01, 2010

Vaccines are "cheap insurance" to protect your horses from more costly--and potentially deadly--diseases.... Read More


PreveNile West Nile Virus Vaccine Recalled

May 04, 2010

In a letter to veterinarians dated April 28, Brett Whitehead, Director, Equine and Ag Retail Business, of Intervet Schering-Plough Animal Health, encouraged practitioners to return all PreveNile vaccine. The recall was initiated after an increa... Read More


Regional Threat for West Nile Virus in 2009

April 27, 2010

More than 530 readers of TheHorse.com responded to a poll asking, "Was West Nile virus a threat in your area last year? If so, where do you live?"... Read More


Virginia Horse Owners Urged to Vaccinate for WNV, EEE

April 26, 2010

The Virginia Department of Agriculture and Consumer Services (VDACS) urges all horse owners to ask their veterinarians for West Nile Virus (WNV) and Eastern Equine Encephalitis (EEE) vaccination recommendations for their animals. An increased number ... Read More


Human WNV Infection Reported Following Equine Necropsy

March 18, 2010

A veterinary student was diagnosed with West Nile virus (WNV) in May 2009 after performing a necropsy on a 4-month-old Welsh pony from Gauteng, South Africa.

Six days after performing the necropsy, the student developed fever, malais... Read More


Neurologic Diseases

March 08, 2010

Diagnosis and treatment recommendations for neurologic diseases, as discussed at the 2009 AAEP Convention. ... Read More


Different West Nile Virus Genetic Lineage Evolving?

February 08, 2010

It's a variant of Murphy's Law: Anytime you think you have a handle on something, the unexpected happens and you're off balance again. The equine health world might be in this boat now concerning West Nile virus infection in horses.... Read More


Single-Dose WNV Booster Effective for Pregnant Mares (AAEP 2009)

February 01, 2010

When we only had one vaccine for West Nile virus (WNV) in horses, vaccination was quite simple. Then when different types of vaccines came along, the waters got a little muddier, especially for pregnant mares in which breeders feared risking no... Read More


Vaccination, WNV, and Colic Fact Sheets Available

January 06, 2010

TheHorse.com is getting 2010 off to a great start with three more Fact Sheets on topics that are important to our readers. The new fact sheets cover vaccinations for your horse, West Nile virus, and equine colic. ... Read More


West Nile Virus Risk Factors Identified

December 23, 2009

A variety of environmental factors might be related to West Nile virus infections in horses, reported a Florida research team lead by Leslie M.V. Rios, PhD, from the Department of Entomology and Nematology at the University of Florida in Gainesville.... Read More


New Equine Education Courtesy of Intervet/Schering-Plough and TheHorse.com

December 02, 2009

Horse owners looking for up-to-date information on parasites and drug resistance can find two new videos on TheHorse.com containing presentations made in Kentucky to a group of veterinarians, vet techs, and horse owners. These are sponsored b... Read More


New West Nile Virus Vaccines for Horses Approved

November 23, 2009

New equine West Nile virus vaccines have been approved by the USDA. The vaccine line, called Vetera, is manufactured by Boehringer-Ingelheim, a privately held pharmaceutical company.

The Vetera line of West Nile virus vaccines... Read More


Seventh Kentucky West Nile Virus Case Confirmed

October 15, 2009

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... Read More


Kentucky West Nile Virus Update: Sixth Case Confirmed

October 10, 2009

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... Read More