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

Kings County, CA

Outbreak Identifier: 7528

Alert ID: 5099

July 31, 2026

Confirmed Case(s) - No Quarantine

Source: California Department of Food and Agriculture

Number Confirmed: 1;
Number Euthanized: 1;

Horse 1:
Age: 8; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 7/26/2026; Clinical Signs: hind end ataxia, hypersensitivity, recumbency; Confirmation Date: 7/31/2026; Horse Status: Euthanized; Vaccination Status: Status Unknown;

Comments: The third (3rd) equine case of West Nile Virus in California in 2026 was confirmed in Kings County. On July 31, 2026, an 8-year-old Quarter Horse gelding in Kings County with unknown vaccine history displaying neurologic signs was confirmed positive for West Nile Virus. The gelding was euthanized due to severity of clinical signs.;

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