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

Bourbon County, KY

Outbreak Identifier: 7038

Alert ID: 4559

September 05, 2025

Confirmed Case(s) - No Quarantine

Source: Kentucky Department of Agriculture

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

Horse 1:
Age: 10; Gender: Mare; Breed: Pony; Usage: Polo; Onset of Clinical Signs: 8/29/2025; Clinical Signs: Lame, progressively worsened developing front limb ataxia with body and face muscle fasciculation; Confirmation Date: 9/4/2025; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

Comments: The mare is thought to have 'potentially' been vaccinated in 2024, but not vaccinated in 2025. This is KY's 7th confirmed equine West Nile Case in 2025.

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