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

Cache County, UT

Outbreak Identifier: 7586

Alert ID: 5159

August 21, 2026

Suspected Case - No Quarantine

Source: Utah Department of Agriculture and Food

Number Suspected: 1;
Number Exposed: 2;
Number Euthanized: 1;
Facility Type: Private Facility;

Horse 1:
Age: 3; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Ranch Horse; Onset of Clinical Signs: 8/9/2026; Clinical Signs: Property owner noted them down on 8/9/2026 pm 8/10/26 AM vet visited and cound not get to stand. Euthanized; Horse Status: Euthanized; Vaccination Status: Unvaccinated;

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