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West Nile Virus Confirmed in California Horse

September 4, 2020
Posted by Edited Press Release

The Glenn County filly marks the state’s seventh confirmed equine WNV case.

Topics: Diseases and Conditions, Horse Care, Horse Industry News, Neurologic Disease, Welfare and Industry, West Nile Virus (WNV)

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West Nile Virus Confirmed in California Horse

This is California’s seventh confirmed equine case of WNV. | Photo: iStock

On Sept. 2, California Department of Food and Agriculture (CDFA) officials confirmed a Glenn County horse with West Nile virus (WNV). The 2-year-old Quarter Horse filly began showing neurologic signs of hind-limb dragging, drooping eyelids, a head drop, and stiff hindquarters on Aug. 29. The filly, which had no vaccination history, is affected and alive.

This is California’s seventh confirmed equine case of WNV. Other confirmed cases have resided in the following counties: Amador (1), Merced (1), Riverside (2), San Joaquin (1), and Stanislaus (1). Five were unvaccinated, and two had unknown vaccination histories. Five have survived, one died, and one was euthanized.

About West Nile Virus

WNV transmission occurs when infected mosquitoes feed on animals, as well as humans, after having fed on infected birds.

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