California’s 15th Case of WNV Confirmed
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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