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EDCC September 2026 Statistics
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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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West Nile Virus
Shasta County, CA
Outbreak Identifier: 7736
Alert ID: 5312
October 09, 2026
Confirmed Case(s) - No Quarantine

California Department of Food and Agriculture

Number Confirmed: 1; 

Horse 1: 
Age: 7; Gender: Mare; Breed: Andalusian; Onset of Clinical Signs: 9/26/2026; Clinical Signs: hypersensitivity, proprioceptive deficits in hind end; Confirmation Date: 10/6/2026; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

Comments: The fifteenth (15th) equine case of West Nile Virus in California in 2026 was confirmed in Shasta County. On October 6, 2026, an unvaccinated 7-year-old Andalusian mare in Shasta County displaying neurologic signs was confirmed positive for West Nile Virus. The mare is alive and recovering.;
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West Nile Virus
Shelby County, TN
Outbreak Identifier: 7735
Alert ID: 5311
October 09, 2026
Confirmed Case(s) - No Quarantine

Tennessee Department of Agriculture

Number Confirmed: 1; 
Number Suspected: 1; 
Number Exposed: Unknown;
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Pigeon Fever
Deschutes County, OR
Outbreak Identifier: 7734
Alert ID: 5310
October 09, 2026
Confirmed Case(s) - Official Quarantine

State Department of Agriculture

Number Confirmed: 1;
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Pigeon Fever
Morrow County, OR
Outbreak Identifier: 7733
Alert ID: 5309
October 09, 2026
Confirmed Case(s) - Official Quarantine

State Department of Agriculture

Number Confirmed: 2; 
Number Exposed: 1;
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Pigeon Fever
Deschutes County, OR
Outbreak Identifier: 7732
Alert ID: 5308
October 09, 2026
Suspected Case - Official Quarantine

State Department of Agriculture

Number Suspected: 2;
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West Nile Virus
Elkhart County, IN
Outbreak Identifier: 7731
Alert ID: 5307
October 08, 2026
Confirmed Case(s) - No Quarantine

Indiana State Board of Animal Health

Number Confirmed: 1; 
Number Exposed: Unknown; 

Horse 1: 
Age: Yearling; Gender: Mare; Breed: Standardbred; Onset of Clinical Signs: 9/16/2026; Clinical Signs: Mild ataxia and shakiness; Confirmation Date: 9/29/2026; Horse Status: Recovered; Vaccination Status: Status Unknown;
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Strangles
Jefferson County, WI
Outbreak Identifier: 7730
Alert ID: 5306
October 08, 2026
Confirmed Case(s) - Voluntary Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

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

Horse 1: 
Age: 17; Gender: Gelding; Breed: Appaloosa; Clinical Signs: Lymphadenopathy, nasal discharge; Confirmation Date: 9/29/2026; Vaccination Status: Unvaccinated;
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Strangles
Dane County, WI
Outbreak Identifier: 7729
Alert ID: 5305
October 08, 2026
Confirmed Case(s) - Voluntary Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

Number Confirmed: 1; 
Number Exposed: Unknown; 

Horse 1: 
Age: 15; Gender: Gelding; Breed: Quarter Horse (QH); Confirmation Date: 9/28/2026; Horse Status: Recovered; Vaccination Status: Vaccinated;
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West Nile Virus
Green County, KY
Outbreak Identifier: 7728
Alert ID: 5304
October 08, 2026
Confirmed Case(s) - No Quarantine

Kentucky Department of Agriculture

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

Horse 1: 
Age: 8; Gender: Mare; Breed: Quarter Horse (QH); Usage: Pleasure Riding; Onset of Clinical Signs: 9/21/2026; Clinical Signs: Ataxia, muscle fasciculations; Confirmation Date: 10/7/2026; Horse Status: Recovering; Vaccination Status: Unvaccinated;

Comments: This is Kentucky's 3rd confirmed equine West Nile case of the year. 
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Potomac Horse Fever
Rocky View County, AB
Outbreak Identifier: 7727
Alert ID: 5303
October 08, 2026
Confirmed Case(s) - No Quarantine

Attending Veterinarian

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

Horse 1: 
Age: 4; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Roping; Onset of Clinical Signs: 9/30/2026; Clinical Signs: Inappetence, dullness and diarrhea.; Confirmation Date: 10/7/2026; Horse Status: Recovered; Vaccination Status: Unvaccinated; Comments: Horse was PCR positive for Neorickettsia findlayensis
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