Outbreaks | Equine Disease Communication Center

Updates on current disease outbreaks are listed here as they occur and will include the date listed, disease name, location and current status. Specific premises will not be named but the general location by town, county and state will be listed. When locations, events or horses are at risk they will be listed. Updates will be posted as they are received.

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West Nile Virus

Stanislaus County, CA

Outbreak Identifier: 5372

Alert ID: 2754

October 04, 2022

Confirmed Case(s) - No Quarantine

Source: California Department of Food and Agriculture

Number Confirmed: 1;
Age: 1; Gender: Filly; Breed: Quarter Horse (QH); Onset of Clinical Signs: 9/24/2022;
Clinical Signs: mild ataxia, mild circumduction; Confirmation Date: 10/3/2022; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;
Comments: On October 3, 2022, a 1-year-old unvaccinated Quarter Horse filly in Stanislaus County, displaying acute neurological signs, was confirmed positive for West Nile Virus. The filly is alive and recovering. This is the twelfth case of equine WNV confirmed in California in 2022. For more information go to: WNV Factsheet.

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