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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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Strangles
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;
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Strangles
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;
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Strangles
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;
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Strangles, Equine Herpesvirus- Respiratory
Washington County, MD
Outbreak Identifier: 7352
Type: EHV-1
Alert ID: 4903
March 04, 2026
Outbreak Update

Maryland Department of Agriculture

Number Confirmed: 2; 
Number Exposed: 20; 
Facility Type: Boarding Facility; 

Horse 1: 
Age: 37; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 3/1/2026; Confirmation Date: 3/4/2026; Horse Status: Quarantined; Vaccination Status: Status Unknown;

Previous Alerts: 4899
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Strangles
Washington County, MD
Outbreak Identifier: 7352
Alert ID: 4899
March 03, 2026
Confirmed Case(s) - Official Quarantine

Maryland Department of Agriculture

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

Horse 1: 
Age: 17; Gender: Gelding; Breed: Oldenburg; Usage: Pleasure Riding; Onset of Clinical Signs: 2/22/2026; Clinical Signs: ADR, fever of 104F, progressed to nasal discharge from right nares. Abscess; Confirmation Date: 2/25/2026; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;
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Strangles
Macomb County, MI
Outbreak Identifier: 7349
Alert ID: 4896
March 02, 2026
Confirmed Case(s) - Voluntary Quarantine

Michigan Department of Agriculture

Number Confirmed: 1; 
Number Exposed: 3; 

Horse 1: 
Age: 10; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 2/22/2026; Clinical Signs: dry cough, unilateral purulent nasal discharge; Confirmation Date: 3/1/2026; Horse Status: Recovering; Vaccination Status: Unvaccinated;
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Strangles
Oakland County, MI
Outbreak Identifier: 7342
Alert ID: 4889
February 24, 2026
Confirmed Case(s) - Voluntary Quarantine

Michigan Department of Agriculture

Number Confirmed: 1; 
Number Exposed: 3; 

Horse 1: 
Age: 5; Gender: Gelding; Breed: Thoroughbred (TB); Onset of Clinical Signs: 2/18/2026; Clinical Signs: Fever, facial swelling, draining tract; Confirmation Date: 2/23/2026; Horse Status: Affected And Alive; Vaccination Status: Vaccinated;
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Strangles
District of Cochrane, ON
Outbreak Identifier: 7335
Alert ID: 4882
February 17, 2026
Confirmed Case(s) - Voluntary Quarantine

OMAFA

Number Confirmed: 1; 
Number Suspected: 1; 
Number Exposed: 2; 
Facility Type: Farm; 

Horse 1: 
Age: 2; Gender: Filly; Breed: Standardbred; Onset of Clinical Signs: 2/11/2026; Clinical Signs: This 2 year old filly on a private farm was examined for a swollen head with enlarged lymph nodes. She tested positive for S. equi by PCR. The yearling in the same pen as her had a purulent nasal discharge.; Horse Status: Recovering; 

Comments: The farm owner, working with their veterinarian, has instituted voluntary animal movement restrictions and biosecurity protocols. To see past and present Strangles cases in Ontario go to: https://www.oahn.ca/resources/ontario-equine-disease-alerts/ and enter the disease surveillance portal;
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Strangles
Essex County, ON
Outbreak Identifier: 7334
Alert ID: 4881
February 13, 2026
Confirmed Case(s) - Voluntary Quarantine

OMAFA

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

Horse 1: 
Gender: Gelding; Onset of Clinical Signs: 2/9/2026; Clinical Signs: Fever, intermittent cough and nasal discharge.; Confirmation Date: 2/12/2026; Vaccination Status: Vaccinated;

Comments: The facility owner, working with their veterinarian, has instituted voluntary animal movement restrictions and biosecurity protocols. To see past and present Strangles cases in Ontario go to: https://www.oahn.ca/resources/ontario-equine-disease-alerts/ and enter the disease surveillance portal;;
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Strangles
Pasco County, FL
Outbreak Identifier: 7332
Alert ID: 4879
February 12, 2026
Confirmed Case(s) - Official Quarantine

FDACS Veterinary Medical Officer

Number Confirmed: 1; 
Number Exposed: 10;
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