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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Potomac Horse Fever

Cumberland County, PA

Outbreak Identifier: 6873

Alert ID: 4378

May 23, 2025

Confirmed Case(s) - Voluntary Quarantine

Source: Attending veterinarian

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

Horse 1:
Age: 20; Gender: Mare; Breed: Quarter Horse (QH); Usage: Pleasure Riding; Onset of Clinical Signs: 5/18/2025; Clinical Signs: The mare presented on the farm for fever and colic signs which progressed to liquid diarrhea. She was subsequently referred to a hospital in Virginia where she is responding in a positive fashion to medical management.; Confirmation Date: 5/22/2025; Horse Status: Affected And Alive; Vaccination Status: Vaccinated;

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