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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.



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Anne Arundel County, MD
Outbreak Identifier: 7364
Alert ID: 4915
March 11, 2026
Confirmed Case(s) - Official Quarantine

Maryland Department of Agriculture

Number Confirmed: 1; 
Number Suspected: 1; 
Number Exposed: 29; 
Number Euthanized: 1; 
Facility Type: Boarding Facility; 

Horse 1: 
Age: 19; Gender: Gelding; Breed: Thoroughbred (TB); Usage: Pleasure Riding; Onset of Clinical Signs: 3/7/2026; Confirmation Date: 3/9/2026; Horse Status: Quarantined; Vaccination Status: Unvaccinated;

Waukesha County, WI
Outbreak Identifier: 4852
Type: EHV-1
Alert ID: 4914
March 11, 2026
Quarantine Released

Wisconsin Department of Agriculture, Trade and Consumer Protection

Number Confirmed: 1; 
Number Suspected: 3; 
Number Exposed: 38; 
Number Euthanized: 1; 
Comments: Quarantine released, no further neurologic cases detected after index case.;

Previous Alert: 4852

Linn County, OR
Outbreak Identifier: 7363
Alert ID: 4913
March 10, 2026
Confirmed Case(s) - Official Quarantine

State Department of Agriculture

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: 4;

Harney County, OR
Outbreak Identifier: 7357
Alert ID: 4912
March 09, 2026
Confirmed Case(s) - Official Quarantine

State Department of Agriculture

Number Confirmed: 9; 
Number Suspected: 3; 
Number Exposed: Unknown; 
Facility Type: Farm; 
Previous Alerts: 4906

Comments: There are 12 horses considered affected and alive. 

Maricopa County, AZ
Outbreak Identifier: 7362
Alert ID: 4911
March 08, 2026
Confirmed Case(s) - Official Quarantine

Arizona Department of Agriculture

Number Confirmed: 1; 
Number Exposed: 32; 
Facility Type: Private Facility;

Bonnyville No. 87, AB
Outbreak Identifier: 7361
Alert ID: 4910
March 07, 2026
Confirmed Case(s) - Official Quarantine

Canadian Food Inspection Agency

Number Confirmed: 8; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Comments: On March 5, 2026, positive equine infectious anemia (EIA) results were confirmed by the Canadian Food Inspection Agency’s (CFIA) national reference laboratory for eight horses located on a premises in Bonnyville No. 87, Alberta. The horses had been tested by the CFIA as part of an on-going disease investigation. No clinical signs of disease were noted at the time of sampling. A CFIA investigation is underway and as per program policy, movement controls have been placed on the infected horse and any on-premises contact animals. Initial reports indicate there are other equines on the affected premises. Movement controls will remain until all disease response activities have been completed, including follow-up testing and ordering the destruction of confirmed cases. Trace-out activities may require the CFIA to undertake actions at additional premises as outlined in the current policy. Improved biosecurity protocols have been strongly recommended to the owners to help control the ongoing spread of EIA and protect our national herd.;

Gallatin County, MT
Outbreak Identifier: 7360
Alert ID: 4909
March 06, 2026
Confirmed Case(s) - Voluntary Quarantine

Attending Veterinarian

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

Levy County, FL
Outbreak Identifier: 7359
Alert ID: 4908
March 06, 2026
Confirmed Case(s) - Official Quarantine

Florida Department of Agriculture and Consumer Services

Number Confirmed: 1; 
Comments: This is the fourth case of Strangles in Florida in 2026;

Lee County, FL
Outbreak Identifier: 7358
Alert ID: 4907
March 06, 2026
Confirmed Case(s) - Official Quarantine

Florida Department of Agriculture and Consumer Services

Number Confirmed: 1; 
Comments: This is the third case of Strangles for Florida in 2026;

Harney County, OR
Outbreak Identifier: 7357
Alert ID: 4906
March 06, 2026
Confirmed Case(s) - Official Quarantine

State Department of Agriculture

Number Confirmed: 8; 
Number Suspected: 4; 
Number Exposed: Unknown; 
Facility Type: Farm;