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Disease Alerts

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.



Montérégie, QC
Outbreak Identifier: 6889
Alert ID: 4399
June 12, 2025
Confirmed Case(s) - Voluntary Quarantine

MAPAQ

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

Horse 1: 
Age: 2; Gender: Mare; Breed: Quarter Horse (QH); Clinical Signs: Respiratory; Confirmation Date: 6/11/2025;

Washington County, VA
Outbreak Identifier: 6813
Alert ID: 4319
April 23, 2025
Confirmed Case(s) - Voluntary Quarantine

Attending Veterinarian

Number Confirmed: 1; 
Number Suspected: 1; 
Number Exposed: Unknown; 
Facility Type: Training Facility; 

Horse 1: 
Age: 3; Gender: Colt; Breed: Quarter Horse (QH); Onset of Clinical Signs: 4/15/2025; Clinical Signs: Fever and inappetance.; Confirmation Date: 4/17/2025; Horse Status: Recovering;

Prince George's County, MD
Outbreak Identifier: 6774
Alert ID: 4267
March 18, 2025
Confirmed Case(s) - Official Quarantine

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

King County, WA
Outbreak Identifier: 6772
Alert ID: 4265
March 17, 2025
Confirmed Case(s) - Voluntary Quarantine

State Veterinarian Office and Attending Veterinarian

Number Confirmed: 1; 
Number Exposed: 1; 
Facility Type: Private Facility; 
Comments: Horse recently moved from Missouri. Had intestinal issue and hospitalized. Swab positive for EHV, but blood negative. Under vet care. Doing better.;