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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
Waukesha County, WI
Outbreak Identifier: 7543
Alert ID: 5115
August 07, 2026
Confirmed Case(s) - Voluntary Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

Number Confirmed: 1; 
Number Exposed: 2; 

Horse 1: 
Age: 15; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 6/24/2026; Clinical Signs: Nasal discharge, fever, abscesses in throat latch region/udder/ near tail head, suspect internal abscesses palpable on rectal palpation; Confirmation Date: 8/4/2026; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;

Comments: Horse came from a local dealer/kill pen rescue.;
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Strangles
Waupaca County, WI
Outbreak Identifier: 7542
Alert ID: 5114
August 07, 2026
Confirmed Case(s) - Voluntary Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

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

Horse 1: 
Age: Weanling; Gender: Colt; Breed: Quarter Horse (QH); Clinical Signs: Cough, nasal discharge; Confirmation Date: 7/31/2026; Vaccination Status: Unvaccinated;

Comments: Horse came from a local dealer/kill pen rescue.;
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Strangles
Lacombe County, AB
Outbreak Identifier: 7540
Alert ID: 5111
August 07, 2026
Confirmed Case(s) - Voluntary Quarantine

Attending veterinarian

Number Suspected: 1; 
Number Exposed: 3; 
Facility Type: Boarding Facility; 

Horse 1: 
Age: 9; Gender: Mare; Breed: Quarter Horse (QH); Clinical Signs: Fever, nasal discharge, lethargy; Horse Status: Recovering; Vaccination Status: Unvaccinated;

Comments: Ruptured retropharyngeal abscesses into guttural pouches; on guttural pouch endoscopy. Recovering;
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Strangles
Dane County, WI
Outbreak Identifier: 7535
Alert ID: 5106
August 06, 2026
Confirmed Case(s) - Voluntary Quarantine

Attending Veterinarian

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

Horse 1: 

Age: Yearling; Gender: Colt; Breed: Grade; Clinical Signs: Fever, nasal discharge; Confirmation Date: 8/5/2026; Horse Status: Affected and Alive; Vaccination Status: Unknown 
 
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Strangles
Rocky View County, AB
Outbreak Identifier: 7534
Alert ID: 5105
August 06, 2026
Confirmed Case(s) - Voluntary Quarantine

Attending veterinarian

Number Confirmed: 1; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 
Comments: Due to respiratory distress caused by compression of the airway due to strangles abscessed horse required emergency tracheostomy;
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Strangles
Ponoka County, AB
Outbreak Identifier: 7533
Alert ID: 5104
August 06, 2026
Confirmed Case(s) - Voluntary Quarantine

Attending veterinarian

Number Suspected: 5; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 

Horse 1: 
Age: 3; Gender: Gelding; Breed: Quarter Horse (QH); Clinical Signs: Respiratory stridor causing compression of the airway due to strangles abscesses; Vaccination Status: Unvaccinated;

Comments: Due to respiratory distress horse required emergency tracheostomy;
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Strangles
Mountain View County, AB
Outbreak Identifier: 7532
Alert ID: 5103
August 06, 2026
Confirmed Case(s) - Voluntary Quarantine

Attending veterinarian

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

Horse 1: 
Age: 9; Gender: Gelding; Breed: Quarter Horse (QH); Clinical Signs: Respiratory stridor due to compression on the airway due to strangles abscesses; Vaccination Status: Unvaccinated;

Horse 2: 
Age: 7; Gender: Stallion; Breed: Quarter Horse (QH); Clinical Signs: Respiratory stridor due to compression of the airway due to strangles abscesses; Vaccination Status: Unvaccinated;

Comments: Both horses required emergency tracheostomy;
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Strangles
Clackamas County, OR
Outbreak Identifier: 7529
Alert ID: 5100
July 31, 2026
Confirmed Case(s) - Official Quarantine

State Department of Agriculture

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown;
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Strangles
Alger County, MI
Outbreak Identifier: 7524
Alert ID: 5095
July 29, 2026
Confirmed Case(s) - Voluntary Quarantine

Michigan Department of Agriculture

Number Confirmed: 1; 
Number Exposed: 12; 

Horse 1: 
Age: 3; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 7/13/2026; Clinical Signs: Lethargy, fever, nasal discharge, anorexia, ocular discharge; Confirmation Date: 7/15/2026; Horse Status: Recovering; Vaccination Status: Vaccinated;
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Strangles
Portage County, WI
Outbreak Identifier: 7521
Alert ID: 5092
July 29, 2026
Confirmed Case(s) - Voluntary Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

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

Horse 1: 
Age: 2; Gender: Mare; Breed: Friesian; Onset of Clinical Signs: 6/18/2026; Clinical Signs: Submandibular abscess; Confirmation Date: 6/22/2026; Horse Status: Recovering; Vaccination Status: Status Unknown;
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