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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
Genesee County, MI
Outbreak Identifier: 7205
Alert ID: 4929
March 27, 2026
Confirmed Case(s) - Voluntary Quarantine

Michigan Department of Agriculture

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

Horse 1: 
Age: 15; Gender: Mare; Breed: Paint; Onset of Clinical Signs: 1/10/2026; Clinical Signs: Fever, nasal discharge; Confirmation Date: 3/26/2026; Horse Status: Recovered; Vaccination Status: Unvaccinated;

Comments: This is the third confirmed case from the premises. The two prior cases were reported under alert 4731 and 4847.; 
Previous Alerts: 4847, 4731
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Strangles
Prince William County, VA
Outbreak Identifier: 7376
Alert ID: 4928
March 27, 2026
Confirmed Case(s) - Voluntary Quarantine

Attending Veterinarian

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Facility Type: Boarding Facility;
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Strangles
Jefferson County, WI
Outbreak Identifier: 7375
Alert ID: 4927
March 25, 2026
Confirmed Case(s) - Voluntary Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

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

Horse 1: 
Age: 15; Gender: Mare; Breed: Quarter Horse (QH); Usage: Rescue; Onset of Clinical Signs: 3/6/2026; Clinical Signs: Bilateral nasal discharge. Exposed to horses with strangles at previous premises; Confirmation Date: 3/23/2026; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

Comments: Horse came from a local rescue that has a long history of transporting equines with strangles and other respiratory diseases.;
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Strangles
Columbia County, FL
Outbreak Identifier: 7372
Alert ID: 4923
March 20, 2026
Confirmed Case(s) - Official Quarantine

Florida Department of Agriculture and Consumer Services

Number Confirmed: 1; 
Number Exposed: 8; 
Number Euthanized: 1; 
Facility Type: Private Facility; 

Horse 1: 
Age: 2; Breed: Quarter Horse (QH); Onset of Clinical Signs: 3/17/2026; Clinical Signs: Respiratory distress; Confirmation Date: 3/20/2026; Horse Status: Euthanized; Vaccination Status: Vaccinated;

Comments: This is the fifth confirmed case of strangles for Florida in 2026.;
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Strangles
Wellington, ON
Outbreak Identifier: 7370
Alert ID: 4920
March 19, 2026
Confirmed Case(s) - Voluntary Quarantine

OMAFA

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

Horse 1: 
Age: 3; Gender: Filly; Breed: Quarter Horse (QH); Clinical Signs: This filly had a fever for 4 days then developed purulent nasal discharge and lymph node enlargement under the jaw. She tested positive for Streptococcus equi by PCR (Strangles).; Horse Status: Recovering; 

Comments: 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
Marquette County, MI
Outbreak Identifier: 7365
Alert ID: 4916
March 12, 2026
Confirmed Case(s) - Voluntary Quarantine

Michigan Department of Agriculture

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

Horse 1: 
Age: 2; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 2/23/2026; Clinical Signs: bilateral nasal discharge; Confirmation Date: 3/5/2026; Horse Status: Recovering; Vaccination Status: Unvaccinated;
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Strangles
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;
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Strangles
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. 
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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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