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

Seneca County, NY

Outbreak Identifier: 7064

Alert ID: 4584

September 16, 2025

Confirmed Case(s) - No Quarantine

Source: State Animal Health Official

Number Confirmed: 1;
Number Exposed: Unknown;
Facility Type: Farm;

Horse 1:
Age: 2; Gender: Colt; Onset of Clinical Signs: 9/7/2025; Clinical Signs: Owner called vet because colt seemed to have generalized weakness. Vet came out to examine and also noted muscle fasciculations on the muzzle, ataxia in the hindlegs, an abnormal gait, increased reactivity to the physical exam and excessive yawning.; Horse Status: Deceased; Vaccination Status: Unvaccinated;

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