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.
Just as with the first Kentucky horse, this WNV-affected horse was not vaccinated for the mosquito-borne virus. In 2009 eight horses in Kentucky were confirmed with having WNV, with six confirmed as unvaccinated. So far there have been 27 WNV cases in the United States and 150 confirmed cases of eastern equine encephalitis (EEE), according to the USDA's National Animal Health Surveillance System.
As the seasons begin to change, horse owners are encouraged to discuss vaccination boosters for their horses for WNV and EEE. You can read more about boosting your WNV and EEE vaccinations on TheHorse.com.