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.



Prince George's County, MD
Outbreak Identifier: 6188
Alert ID: 3642
March 18, 2024
Confirmed Case(s) - Voluntary Quarantine

Attending Veterinarian

Number Confirmed: 1; 
Number Suspected: 2; 
Number Exposed: 3;

Ottawa County, MI
Outbreak Identifier: 6187
Alert ID: 3641
March 18, 2024
Confirmed Case(s) - Voluntary Quarantine

Michigan Department of Agriculture and Rural Development

Number Confirmed: 3; 
Number Exposed: 31; 

Horse 1: 
Age: 9; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 2/9/2024; Clinical Signs: Fever, off hay; Confirmation Date: 3/13/2024; Horse Status: Recovering; Vaccination Status: Unvaccinated;

Horse 2: 
Age: 2; Gender: Filly; Breed: Quarter Horse (QH); Onset of Clinical Signs: 2/19/2024; Clinical Signs: Fever, off hay; Confirmation Date: 3/13/2024; Horse Status: Recovering; Vaccination Status: Unvaccinated;

Horse 3: 
Age: 8; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 2/16/2024; Clinical Signs: Fever, off hay; Confirmation Date: 3/13/2024; Horse Status: Recovering; Vaccination Status: Unvaccinated;

Spokane County, WA
Outbreak Identifier: 6186
Alert ID: 3640
March 18, 2024
Confirmed Case(s) - Voluntary Quarantine

State Veterinarian Office.

Number Confirmed: 1; 
Number Exposed: 4; 
Facility Type: Boarding Facility; 
Comments: Under vet care and supervision. Sick horse isolated and other exposed horses are getting temped daily.;

Montgomery County, TN
Outbreak Identifier: 6185
Alert ID: 3639
March 15, 2024
Confirmed Case(s) - Official Quarantine

Tennessee Department of Agriculture

Number Confirmed: 3; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Number Euthanized: 3; 
Facility Type: Boarding Facility; 
Comments: All potential exposed animals have been identified and quarantined. They are located only at the boarding facility where they are under official quarantine. There are no epidemiological ties to any equines at other facilities, and there have been no cases reported outside of the quarantined facility.;

Geauga County, OH
Outbreak Identifier: 6184
Alert ID: 3638
March 15, 2024
Confirmed Case(s) - Official Quarantine

State Dept of Agriculture

Number Confirmed: 1; 
Number Exposed: 25; 
Number Euthanized: 1; 
Facility Type: Private Facility; 

Horse 1: 
Age: 3; Gender: Mare; Breed: Standardbred; Usage: Personal Use; Onset of Clinical Signs: 3/7/2024; Clinical Signs: Neurologic, down in the stall; Horse Status: Euthanized; 

Comments: All exposed animals have been identified and quarantined. No epidemiological ties to equines at other facilities, all exposed animals are at the private facility. Does not appear to be linked to other EHV-1 cases in NE Ohio.;

Elkhart, Kosciusko, LaGrange County, IN
Outbreak Identifier: 6183
Alert ID: 3637
March 15, 2024
Confirmed Case(s) - Official Quarantine

Indiana State Board of Animal Health

Number Confirmed: 6; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 
Comments: From 3/12-14/2024, horses on four separate private premises were placed under official quarantine by the Indiana State Board of Animal Health (BOAH) due to confirmation of EHV-1 in horses exhibiting neurologic signs. The breeds involved are Belgian, Dutch harness, and standardbred. The private facilities are in Elkhart, LaGrange, and Kosciusko counties. The affected horses range in age from 3 years to 12 years old. BOAH encourages horse owners to be mindful of biosecurity, especially for horses that travel away from their home premises and return, and for newly acquired horses.;

Washington County, RI
Outbreak Identifier: 6182
Alert ID: 3636
March 14, 2024
Confirmed Case(s) - Official Quarantine

State Veterinarian

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: 20; 
Facility Type: Boarding Facility; 

Horse 1: 
Onset of Clinical Signs: 3/12/2024; Clinical Signs: Nasal discharge, fever noted on 3/12 approximately 14 days after the horse was purchased at a sale barn. The attending veterinarian saw the horse was seen 3/13; Confirmation Date: 3/13/2024; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;

Sauk County, WI
Outbreak Identifier: 6181
Alert ID: 3635
March 13, 2024
Confirmed Case(s) - Official Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

Number Confirmed: 2; 
Number Exposed: 15; 
Number Euthanized: 1; 
Facility Type: Boarding Facility; 

Horse 1: 
Age: 19; Gender: Gelding; Breed: Thoroughbred (TB); Onset of Clinical Signs: 3/4/2024; Clinical Signs: Dribbling urine, recumbent; Horse Status: Euthanized; 

Horse 2: 
Age: 22; Gender: Gelding; Breed: Arabian; Onset of Clinical Signs: 3/2/2024; Clinical Signs: Lethargy, inappetance; Confirmation Date: 3/7/2024; Horse Status: Affected And Alive;

Cambria County, PA
Outbreak Identifier: 6179
Alert ID: 3634
March 12, 2024
Confirmed Case(s) - Official Quarantine

Pennsylvania Department of Agriculture

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

Lapeer County, MI
Outbreak Identifier: 6178
Alert ID: 3633
March 12, 2024
Confirmed Case(s) - Voluntary Quarantine

Michigan Department of Agriculture and Rural Development

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 

Horse 1: 
Age: Weanling; Gender: Colt; Breed: Mixed breed; Onset of Clinical Signs: 3/3/2024; Clinical Signs: nasal discharge, fever, enlarged lymph node; Confirmation Date: 3/11/2024; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;