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California Confirms Third West Nile Virus Case

August 17, 2020
Posted by Edited Press Release

This case marks the state’s first equine death from WNV in 2020.

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

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California Confirms Third West Nile Virus Case

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

On Aug. 12, California Department of Food and Agriculture (CDFA) officials confirmed the state’s third case of West Nile virus (WNV) for 2020. The affected horse, an unvaccinated 17-year-old gelding from Merced County, experienced onset of clinical signs on Aug. 7. Signs included fever, depression, ataxia (loss of control of bodily movements), and dragging his hind feet. The horse is deceased.

Other horses confirmed with WNV this year were from Amador and Stanislaus counties. Two were unvaccinated and one had a vaccination history that was unknown. The other two horses are still living.

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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