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

San Luis Obispo County, CA

Outbreak Identifier: 5807

Alert ID: 3242

August 25, 2023

Confirmed Case(s) - No Quarantine

Source: California Department of Food and Agriculture

Number Confirmed: 1;
Number Exposed: Unknown;
Age: 5; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 8/17/2023;
Clinical Signs: Moderate to severe ataxia, muscle fasciculations, ear twitching; Confirmation Date: 8/24/2023; Horse Status: Recovering; Vaccination Status: Undervaccinated;
Comments: This is the 14th case of equine WNV confirmed in CA in 2023.

For more information, go to: https://www.cdfa.ca.gov/ahfss/Animal_Health/WNV_Info.html

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