New West Nile Virus detections in horses

A dangerous disease, west Nile virus, has returned to California this summer.  A total of eight horses have been confirmed positive for the disease,  in Glenn, Contra Costa, Fresno, Kern (2), Riverside, Plumas, and San Joaquin counties. Six horses were unvaccinated and two horses had unknown vaccination status. Five horses died or were euthanized and three horses are recovering.

Once again, we remind horse owners to have their animals vaccinated. It offers them maximum protection against the disease. And once vaccinations occur, horse owners should be checking regularly with their veterinarians to make sure they stay current.

Californians can also do their part to prevent the disease by managing mosquitoes that carry west Nile virus. Please eliminate standing water and work to limit mosquito access to horses by stabling during active mosquito feeding times such as dusk to dawn, and by utilizing fly sheets, masks or permethrin-based mosquito repellents.

It’s important to remember that mosquitoes become infected with the virus when they feed on infected birds.  Horses are a dead-end host and do not spread the virus to other horses or humans. For more information on west Nile virus, please visit this link.

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