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

Berks County, PA

Outbreak Identifier: 6926

Alert ID: 4440

July 25, 2025

Confirmed Case(s) - No Quarantine

Source: Attending veterinarian

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

Horse 1:
Age: 16; Gender: Gelding; Breed: Draft-cross; Usage: Dressage; Onset of Clinical Signs: 7/12/2025; Clinical Signs: Fever, increased heart rate, decreased gut sounds, decreased manure production, toxic mucous membranes; Confirmation Date: 7/24/2025; Horse Status: Recovered; Vaccination Status: Unvaccinated;

Comments: No diarrhea, no laminitis. Oxytetracycline treatment started when fever first noted.;

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