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.

Health Alert: West Nile Virus in Horses

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