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

Oklahoma County, OK

Outbreak Identifier: 7836

Alert ID: 5410

November 04, 2026

Confirmed Case(s) - No Quarantine

Source: State Veterinarian

Number Confirmed: 1;
Number Suspected: Unknown;
Number Exposed: Unknown;
Facility Type: Training Facility;

Horse 1:
Age: Yearling; Gender: Filly; Breed: Thoroughbred (TB); Usage: Racing; Onset of Clinical Signs: 10/26/2026; Clinical Signs: Ataxic, fever, Muscle fasciculations. Clinical signs progressively worsened over a 24-hour period, followed by subsequent clinical improvement.; Horse Status: Recovering; Vaccination Status: Unvaccinated;

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