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California’s 15th Case of WNV Confirmed

October 13, 2020
Posted by Diane E. Rice

The 6-year-old mare was humanely euthanized.

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

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The 6-year-old mare was humanely euthanized. | Photo: Wikimedia Commons

On Oct. 5, California Department of Food and Agriculture (CDFA) officials confirmed a San Joaquin County horse with West Nile virus (WNV). The unvaccinated 6-year-old Quarter Horse mare became ill on Sept. 27, showing neurologic signs consisting of agitation, falling over, muscle fasciculations (twitching), recumbency (down and unable to rise), and grimacing. The horse was subsequently euthanized due to the severity of her clinical signs.

Other California horses that have been confirmed with WNV resided in these counties:

Amador (1)
Butte (1)
Glenn (1)
Kings (1)
Merced (1)
Nevada (1)
Riverside (2)
San Bernardino (1)
San Joaquin (3)
Stanislaus (3)

Eleven horses survived, one died, and three were euthanized. Nine were unvaccinated, four had unknown vaccination histories, and two were vaccinated

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Written by:

Diane E. Rice

Diane Rice earned her bachelor’s degree in agricultural journalism from the University of Wisconsin, then married her education with her lifelong passion for horses by working in editorial positions at Appaloosa Journal for 12 years. She has also served on the American Horse Publications’ board of directors. She now freelances in writing, editing, and proofreading. She lives in Middleton, Idaho, and spends her spare time gardening, reading, serving in her church, and spending time with her daughters, their families, and a myriad of her own and other people’s pets.