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

Los Angeles County, CA

Outbreak Identifier: 6453

Alert ID: 3930

September 09, 2024

Confirmed Case(s) - No Quarantine

Source: California Department of Food and Agriculture

Number Confirmed: 1;
Number Exposed: Unknown;

Horse 1:
Age: 7; Gender: Mare; Breed: Warmblood (WB); Onset of Clinical Signs: 8/28/2024; Clinical Signs: ataxia (all 4 limbs), muscle fasciculations; Confirmation Date: 9/6/2024; Horse Status: Affected And Alive; Vaccination Status: Undervaccinated;

Comments: The sixth (6th) case of West Nile Virus in California in 2024 was confirmed in Los Angeles County. On September 6, 2024, an undervaccinated 7-year-old Warmblood mare in Los Angeles County displaying neurologic signs was confirmed positive for West Nile Virus. The mare is alive and recovering.;

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