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.



Equine Herpesvirus- Respiratory
Baltimore County, MD
Outbreak Identifier: 5832
Alert ID: 3268
September 01, 2023
Confirmed Case(s) - No Quarantine

Attending Veterinarian

Number Confirmed: 1
Number Exposed: 18 
Facility Type: Training Facility 
Age: 2; Gender: Colt; Breed: Thoroughbred (TB); Usage: Racing; Onset of Clinical Signs: 8/30/2023
Clinical Signs: mild nasal discharge, depression, lethargy, reluctant to move voluntarily,; Confirmation Date: 9/1/2023; Horse Status: Affected And Alive; Vaccination Status: Status Unknown
Comments: 18 out of 20 training barn horses presented with a temperature of 103 for three days. The horses presented with minimal serous discharge and tested positive for EHV-4.

Equine Herpesvirus- Respiratory
Région des Laurentides, QC
Outbreak Identifier: 5826
Alert ID: 3261
August 31, 2023
Confirmed Case(s) - Voluntary Quarantine

Attending Veterinarian

Number Confirmed: 1; 
Number Suspected: 1; 
Number Exposed: 18; 
Facility Type: Stable; 
Age: 28; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 8/16/2023;
Clinical Signs: Persistent fever, drowsiness, decreased appetite, swollen legs, mild cough and nasal discharge.; Confirmation Date: 8/22/2023; Horse Status: Unknown; Vaccination Status: Vaccinated;