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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
Okeechobee County, FL
Outbreak Identifier: 7706
Alert ID: 5282
October 02, 2026
Confirmed Case(s) - No Quarantine

State Animal Health Official and Attending Veterinarian

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

Horse 1: 
Age: 4; Gender: Stallion; Breed: Quarter Horse (QH); Onset of Clinical Signs: 9/27/2026; Clinical Signs: Ataxia, somnolence, fever, facial twitching; Confirmation Date: 10/2/2026; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;
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West Nile Virus
Grand County, CO
Outbreak Identifier: 7705
Alert ID: 5281
October 01, 2026
Confirmed Case(s) - No Quarantine

State Veterinarian's Office

Number Confirmed: 1; 
Number Exposed: 210; 
Number Euthanized: 1; 
Facility Type: Private Facility; 

Horse 1: 
Age: 24; Gender: Mare; Breed: Quarter Horse (QH); Usage: farm/ranch; Onset of Clinical Signs: 9/24/2026; Clinical Signs: Weakness Ataxia Teeth Grinding Abnormal Mentation Unable to Rise Fasciculation; Confirmation Date: 9/30/2026; Horse Status: Euthanized; Vaccination Status: Vaccinated;
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Strangles
Jackson County, KS
Outbreak Identifier: 7704
Alert ID: 5280
October 01, 2026
Confirmed Case(s) - Voluntary Quarantine

Attending Veterinarian

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Facility Type: Farm;
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Strangles
Outagamie County, WI
Outbreak Identifier: 7703
Alert ID: 5279
October 01, 2026
Confirmed Case(s) - Voluntary Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

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

Horse 1: 
Age: 20; Gender: Gelding; Breed: Quarter Horse Cross; Onset of Clinical Signs: 9/18/2026; Clinical Signs: nasal discharge, mandibular lymph node abscess; Confirmation Date: 9/22/2026; Horse Status: Recovering; Vaccination Status: Unvaccinated;
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Equine Influenza
Polk County, WI
Outbreak Identifier: 7702
Alert ID: 5278
September 30, 2026
Confirmed Case(s) - Voluntary Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

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

Horse 1: 
Age: 10; Gender: Mare; Breed: Quarter Horse Cross; Onset of Clinical Signs: 9/22/2026; Clinical Signs: Fever, cough, bilateral mucopurulent nasal discharge; Confirmation Date: 9/25/2026; Horse Status: Recovering; Vaccination Status: Unvaccinated;
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West Nile Virus
Clinton County, KY
Outbreak Identifier: 7701
Alert ID: 5277
September 30, 2026
Confirmed Case(s) - No Quarantine

Kentucky Department of Agriculture

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

Horse 1: 
Age: 9; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Pleasure Riding; Onset of Clinical Signs: 9/18/2026; Clinical Signs: Ataxic, hyperesthesia, inappetance; Confirmation Date: 9/29/2026; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

Comments: This is the 2nd 2026 confirmed Eq West Nile virus in KY for the year-to-date.
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Pigeon Fever
Harney County, OR
Outbreak Identifier: 7700
Alert ID: 5276
September 28, 2026
Suspected Case - Voluntary Quarantine

State Department of Agriculture

Number Suspected: 1; 
Number Exposed: 5;
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West Nile Virus
Wayne County, MI
Outbreak Identifier: 7699
Alert ID: 5275
September 28, 2026
Confirmed Case(s) - No Quarantine

Program Manager

Number Confirmed: 1; 
Number Exposed: 18; 
Facility Type: Stable;
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Equine Infectious Anemia
Los Angeles County, CA
Outbreak Identifier: 7698
Alert ID: 5274
September 28, 2026
Confirmed Case(s) - Official Quarantine

California Department of Food and Agriculture

Number Confirmed: 1; 
Number Exposed: 43; 
Number Euthanized: 1; 

Horse 1: 
Age: 17; Gender: Gelding; Breed: Thoroughbred (TB); Horse Status: Euthanized; 

Comments: A 17–year–old Thoroughbred gelding in Los Angeles County was confirmed positive for Equine Infectious Anemia (EIA). Forty-three (43) potentially exposed horses on the home premises have initially tested negative for EIA and will remain under quarantine until their sixty (60) day retest as per CDFA and USDA program requirements. CDFA has been on site with continued monitoring of the situation.;
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West Nile Virus
Fremont County, WY
Outbreak Identifier: 7697
Alert ID: 5273
September 28, 2026
Confirmed Case(s) - No Quarantine

State Animal Health Official

Number Confirmed: 1; 
Number Exposed: Unknown;
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