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 Diego County, CA

Outbreak Identifier: 6405

Alert ID: 3882

August 26, 2024

Confirmed Case(s) - No Quarantine

Source: California Department of Food and Agriculture

Number Confirmed: 1;
Number Exposed: Unknown;

Horse 1:
Age: 20; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 8/14/2024; Clinical Signs: ataxia (all 4 - worse in hind end), depressed, lethargy; Horse Status: Affected And Alive;

Comments: The fifth (5th) case of West Nile Virus in California in 2024 was confirmed in San Diego County. On August 23, 2024, an undervaccinated 9-year-old Quarter Horse gelding in San Diego County displaying neurologic signs was confirmed positive for West Nile Virus. The gelding is alive and recovering.;

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