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.

Disease

Outbreak States

Start Date

End Date

Equine Herpesvirus- Respiratory

Prince George's County, MD

Outbreak Identifier: 6774

Alert ID: 4267

March 18, 2025

Confirmed Case(s) - Official Quarantine

Source: State Veterinarian

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

Horse 1:
Age: 3; Gender: Stallion; Breed: Thoroughbred (TB); Usage: Racing; Onset of Clinical Signs: 3/7/2025; Clinical Signs: Fever, hind limb cellulitis; Confirmation Date: 3/13/2025; Horse Status: Affected And Alive;

Notice is given that an Animal and Facility Hold Order is hereby established to control and
prevent the spread of the disease identified as EHV-1. In accordance with the laws of the State of
Maryland, the following animal(s) and/or facility of animals are quarantined to the following
premises, now and until released: Laurel Park Racetrack Barn 31

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