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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.

Crook County, OR
Outbreak Identifier: 7402
Alert ID: 4954
April 16, 2026
Confirmed Case(s) - Official Quarantine

State Department of Agriculture

Number Confirmed: 1; 
Number Suspected: 3; 
Facility Type: Private Facility;

Washington County, NE
Outbreak Identifier: 7392
Type: EHV-4
Alert ID: 4944
April 09, 2026
Confirmed Case(s) - Voluntary Quarantine

Attending Veterinarian

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: 10;

Yamhill County, OR
Outbreak Identifier: 7383
Alert ID: 4940
April 07, 2026
Confirmed Case(s) - Official Quarantine

State Department of Agriculture

Number Confirmed: 2; 
Number Suspected: Unknown; 
Number Exposed: 35; 
Facility Type: Boarding Facility; 
Comments: Additional case confirmed; 
Previous Alerts: 4935

Yamhill County, OR
Outbreak Identifier: 7383
Alert ID: 4935
April 02, 2026
Confirmed Case(s) - Official Quarantine

State Department of Agriculture

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: 36; 
Facility Type: Boarding Facility;

Dane County, WI
Outbreak Identifier: 7378
Alert ID: 4931
April 01, 2026
Confirmed Case(s) - Voluntary Quarantine

Attending Veterinarian

Number Confirmed: 2; 
Number Suspected: 1; 
Number Exposed: 4; 
Facility Type: Private Facility; 

Horse 1: 
Onset of Clinical Signs: 3/23/2026; Clinical Signs: fever, cough, nasal discharge; Confirmation Date: 3/31/2026; Horse Status: Quarantined; Vaccination Status: Status Unknown;

Lake County, OR
Outbreak Identifier: 7377
Alert ID: 4930
March 31, 2026
Confirmed Case(s) - Official Quarantine

State Department of Agriculture

Number Confirmed: 1; 
Number Suspected: 2; 
Number Exposed: 40; 
Facility Type: Training Facility;

Pierce County, WA
Outbreak Identifier: 7374
Alert ID: 4926
March 24, 2026
Confirmed Case(s) - No Quarantine

Asst State Veterinarian-WSDA

Number Confirmed: 1; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 
Comments: Purchased at Billings horse sale. Under vet care. Recovering;

Ellis County, KS
Outbreak Identifier: 7366
Alert ID: 4917
March 15, 2026
Confirmed Case(s) - Voluntary Quarantine

Attending veterinarian

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

Horse 1: 
Age: 8; Gender: Mare; Breed: Quarter Horse (QH); Usage: Rodeo; Onset of Clinical Signs: 3/8/2026; Clinical Signs: Fever, lethargic, bilateral nasal discharge, anorexia, and cough; Confirmation Date: 3/13/2026; Horse Status: Recovering; Vaccination Status: Undervaccinated;

Gallatin County, MT
Outbreak Identifier: 7360
Alert ID: 4909
March 06, 2026
Confirmed Case(s) - Voluntary Quarantine

Attending Veterinarian

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

Snohomish County, WA
Outbreak Identifier: 7350
Alert ID: 4897
March 02, 2026
Confirmed Case(s) - Voluntary Quarantine

Attending Veterinarian

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: 10; 
Facility Type: Training Facility;