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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
Tehama County, CA
Outbreak Identifier: 5319
Alert ID: 2699
August 25, 2022
Confirmed Case(s) - No Quarantine

California Department of Food and Agriculture

Number Confirmed: 1;
Age: 5; Gender: Stallion; Breed: Spanish Mustang; Onset of Clinical Signs: 8/13/2022;
Clinical Signs: Down, partial front limb paralysis; Confirmation Date: 8/24/2022; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;
Comments: On August 24, 2022, a 5-year-old Spanish Mustang stallion in Tehama County, displaying acute neurologic signs, was confirmed positive for West Nile Virus. The stallion's vaccination status is unknown, and he is currently alive. For 2022, a total of four (4) horses have been confirmed positive for WNV in California. The positive horses were located in Kern County (2), Sacramento County (1) and Tehama County (1). For more information about West Nile Virus go to: WNV factsheet. 
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