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
Aiken County, SC
Outbreak Identifier: 6156
Alert ID: 3607
February 29, 2024
Confirmed Case(s) - Official Quarantine

Clemson Livestock Poultry Health

Number Confirmed: 1; 
Number Exposed: 4; 
Facility Type: Farm; 

Horse 1: 
Age: 6; Gender: Gelding; Breed: Donkey; Onset of Clinical Signs: 2/13/2024; Clinical Signs: Fever, lethargy; Confirmation Date: 2/22/2024; Horse Status: Recovering; Vaccination Status: Vaccinated;

Comments: Donkey experienced a fever of unknown origin. No clinical signs of EHM, but was positive on nasal swab. Donkey is normal currently. Quarantine is ongoing for a total of 21 days.;
Equine Herpesvirus- Respiratory
Benton County, OR
Outbreak Identifier: 6122
Alert ID: 3573
February 07, 2024
Confirmed Case(s) - Official Quarantine

Attending Veterinarin

Number Confirmed: 2; 
Number Exposed: 55; 
Facility Type: Training Facility; 

Horse 1: 
Age: 6; Gender: Gelding; Breed: Thoroughbred (TB); Usage: Eventing; Onset of Clinical Signs: 2/3/2024; Clinical Signs: Coughing; Confirmation Date: 2/5/2024; Horse Status: Affected And Alive; Vaccination Status: Undervaccinated;

Horse 2: 
Age: 9; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Pleasure Riding; Onset of Clinical Signs: 2/3/2024; Clinical Signs: Diarrhea; Confirmation Date: 2/5/2024; Horse Status: Affected And Alive; Vaccination Status: Vaccinated;
Equine Herpesvirus- Respiratory
Providence County, RI
Outbreak Identifier: 6103
Alert ID: 3558
January 29, 2024
Confirmed Case(s) - Official Quarantine

State Veterinarian

Number Confirmed: 1; 
Number Exposed: 20; 
Facility Type: Private Facility; 

Horse 1: 
Age: 2; Breed: Quarter Horse (QH); Usage: Horse Show; Onset of Clinical Signs: 1/22/2024; Clinical Signs: Attending veterinarian reported that this horse was part of a cohort of 5 that was shipped to RI from FL. All horses are owned by the same owner and they were not shipped with others. Veterinarian reported the affected horse to be mildly febrile and had mild respiratory signs. The veterinarian performed a nasopharyngeal wash and EHV-4 was detected as part of a diagnostic panel that included other respiratory pathogens, but those pathogens were not detected; Confirmation Date: 1/25/2024; Horse Status: Recovering; Vaccination Status: Status Unknown;