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Disease Alerts

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.



West Nile Virus
Tehama County, CA
Outbreak Identifier: 6585
Alert ID: 4053
October 11, 2024
Confirmed Case(s) - No Quarantine

California Department of Food and Agriculture

Number Confirmed: 1; 
Number Exposed: Unknown; 

Horse 1: 
Age: 3; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 10/4/2024; Clinical Signs: ataxia, lethargy; Confirmation Date: 10/10/2024; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;

Comments: The seventh (7th) case of West Nile Virus in California in 2024 was confirmed in Tehama County. On October 10, 2024, a 3-year-old Quarter Horse mare with an unknown vaccine history in Tehama County displaying neurologic signs was confirmed positive for West Nile Virus. The mare is alive and recovering.;
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