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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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The color range is based off of the selected End Date. If the End Date doesn't have a value it will use Today's Date.

Strangles
Allegan County, MI
Outbreak Identifier: 7499
Alert ID: 5068
July 06, 2026
Confirmed Case(s) - Voluntary Quarantine

Michigan Department of Agriculture

Number Confirmed: 1; 
Number Exposed: Unknown; 

Horse 1: 
Age: 13; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 6/22/2026; Clinical Signs: Nasal discharge and discharge from lymph nodes; Confirmation Date: 7/2/2026; Horse Status: Recovering; Vaccination Status: Status Unknown;
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Strangles
Spokane County, WA
Outbreak Identifier: 7497
Alert ID: 5065
July 02, 2026
Confirmed Case(s) - Voluntary Quarantine

Asst State Veterinarian-WSDA

Number Confirmed: 1; 
Number Suspected: 1; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 
Comments: From the Referring Veterinarian: Owner had this patient's mare at a breeding facility returned (two weeks prior to examination) with upper respiratory signs. Mare was immediately placed back with this patient. Suspect the mare is carrier. This is this patient's second positive test, with the previous one performed in Sept '25 at UC-Davis. Later had a < 1:200 S. equi equi titer in March '26 to assess risk for Purpura Hemorrhagica prior to immunizing. Mare had titers performed at the same time with a result of 1:800.;
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Strangles
Polk County, FL
Outbreak Identifier: 7489
Alert ID: 5057
June 29, 2026
Confirmed Case(s) - Official Quarantine

Florida Department of Agriculture and Consumer Services

Number Confirmed: 1; 
Number Exposed: 5; 
Facility Type: Private Facility; 
Comments: This is the 17th confirmed premises with strangles for Florida in 2026.;
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Strangles
Calvert County, MD
Outbreak Identifier: 7484
Alert ID: 5052
June 25, 2026
Confirmed Case(s) - Official Quarantine

Maryland Department of Agriculture

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: 20; 
Facility Type: Private Facility; 

Horse 1: 
Age: 6; Gender: Stallion; Breed: Pony Cross; Usage: Pleasure Riding; Onset of Clinical Signs: 6/19/2026; Clinical Signs: mild upper respiratory, mild fever, and submandibular abscess; Confirmation Date: 6/25/2026; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;
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Strangles
Temiskaming, ON
Outbreak Identifier: 7261
Alert ID: 5050
June 24, 2026
Quarantine Released

Ontario Ministry of Agriculture, Food, and Agribusiness

Number Confirmed: 3; 
Comments: This facility is no longer under voluntary movement restrictions. The last case of Strangles was in February 2026.; 
Previous Alerts: 4794
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Strangles
Spokane County, WA
Outbreak Identifier: 7479
Alert ID: 5046
June 22, 2026
Confirmed Case(s) - No Quarantine

Asst State Veterinarian-WSDA

Number Confirmed: 1; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 
Comments: Under vet care. Animal had not travelled, but horses in nearby stalls had.;
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Strangles
Ward County, ND
Outbreak Identifier: 7475
Alert ID: 5043
June 19, 2026
Confirmed Case(s) - No Quarantine

State Veterinarian

Number Confirmed: 1; 
Number Suspected: 1; 
Number Exposed: 1; 
Facility Type: Farm;
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Strangles
King County, WA
Outbreak Identifier: 7473
Alert ID: 5040
June 17, 2026
Confirmed Case(s) - Voluntary Quarantine

Asst State Veterinarian-WSDA

Number Confirmed: 1; 
Facility Type: Private Facility; 
Comments: 23 yr old Horse under vet care.;
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Strangles
Baker County, OR
Outbreak Identifier: 7470
Alert ID: 5037
June 16, 2026
Confirmed Case(s) - Official Quarantine

State Department of Agriculture

Number Confirmed: 2; 
Number Exposed: Unknown;
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Strangles
Okanogan County, WA
Outbreak Identifier: 7469
Alert ID: 5036
June 12, 2026
Confirmed Case(s) - No Quarantine

Asst State Veterinarian-WSDA

Number Confirmed: 2; 
Number Suspected: 1; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 
Comments: Under veterinary care.;
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