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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
Flathead County, MT
Outbreak Identifier: 7588
Alert ID: 5161
August 22, 2026
Confirmed Case(s) - Voluntary Quarantine

Attending Veterinarian

Number Confirmed: 1; 
Number Exposed: 2; 
Facility Type: Farm;
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Strangles
King County, WA
Outbreak Identifier: 7583
Alert ID: 5156
August 21, 2026
Confirmed Case(s) - No Quarantine

Asst State Veterinarian-WSDA

Number Confirmed: 1; 
Number Suspected: 8; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 
Comments: Facility is under self imposed quarantine and under veterinary care.;
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Strangles
St Clair County, MI
Outbreak Identifier: 7581
Alert ID: 5153
August 20, 2026
Confirmed Case(s) - Voluntary Quarantine

Michigan Department of Agriculture

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

Horse 1: 
Age: 22; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 8/16/2026; Clinical Signs: coughing, depression, increased respiration rate; Confirmation Date: 8/18/2026; Horse Status: Recovering; Vaccination Status: Unvaccinated;
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Strangles
Willow Creek MD, AB
Outbreak Identifier: 7578
Alert ID: 5150
August 20, 2026
Confirmed Case(s) - Voluntary Quarantine

Attending Veterinarian

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 
Comments: Submandibular lymph node abscesses and purulent discharge, recovering well;
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Strangles
Lake County, OR
Outbreak Identifier: 7573
Alert ID: 5145
August 19, 2026
Confirmed Case(s) - Official Quarantine

Attending Veterinarian

Number Confirmed: 1; 
Number Suspected: 1; 
Number Exposed: 1; 
Facility Type: Farm; 
Comments: Horse was recently purchased in Lane County and disease should be isolated to the effected farm.;
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Strangles
Marion County, FL
Outbreak Identifier: 7572
Alert ID: 5144
August 19, 2026
Confirmed Case(s) - Official Quarantine

FDACS Veterinary Medical Officer

Number Confirmed: 1; 
Number Exposed: 4; 
Facility Type: Private Facility; 
Comments: This is the 20th confirmed strangles case for Florida in 2026.;
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Strangles
Sonoma County, CA
Outbreak Identifier: 7567
Alert ID: 5139
August 17, 2026
Confirmed Case(s) - Voluntary Quarantine

Attending veterinarian

Number Confirmed: 1; 
Number Suspected: 1; 
Number Exposed: 30; 
Facility Type: Boarding Facility; 

Horse 1: 
Age: 25; Gender: Mare; Breed: Thoroughbred (TB); Usage: Therapy; Onset of Clinical Signs: 8/7/2026; Clinical Signs: cough; Confirmation Date: 8/13/2026; Horse Status: Isolated;
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Strangles
Waupaca County, WI
Outbreak Identifier: 7562
Alert ID: 5134
August 13, 2026
Confirmed Case(s) - Voluntary Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

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

Horse 1: 
Age: 23; Gender: Gelding; Breed: Paint; Clinical Signs: Nasal discharge, cough; Confirmation Date: 8/11/2026; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

Comments: Affected horses were acquired from auction;
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Strangles
Dane County, WI
Outbreak Identifier: 7559
Alert ID: 5131
August 13, 2026
Confirmed Case(s) - Voluntary Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

Number Confirmed: 1; 
Number Exposed: Unknown; 

Horse 1: 
Age: 5; Gender: Gelding; Breed: Paint; Clinical Signs: Nasal discharge; Horse Status: Affected And Alive; Vaccination Status: Undervaccinated;

Comments: Horse came from a dealer/kill pen rescue in southern Wisconsin;
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Strangles
Winnebago County, WI
Outbreak Identifier: 7554
Alert ID: 5126
August 12, 2026
Confirmed Case(s) - Voluntary Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

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

Horse 1: 
Age: 23; Gender: Gelding; Breed: Paint; Usage: Barrel Racing; Onset of Clinical Signs: 8/1/2026; Clinical Signs: Abscessation of multiple lymph nodes, nasal discharge, fever, cough, lethargy; Confirmation Date: 8/12/2026; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

Comments: Approximately 20-30 horse boarding facility;
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