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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.

West Nile Virus
Osceola County, FL
Outbreak Identifier: 7844
Alert ID: 5416
November 06, 2026
Confirmed Case(s) - No Quarantine

Florida Department of Agriculture and Consumer Services

Number Confirmed: 1; 
Number Exposed: Unknown; 
Comments: This is the 5th confirmed case of WNV for Florida in 2026.;
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West Nile Virus
Williamson County, TN
Outbreak Identifier: 7841
Alert ID: 5415
November 05, 2026
Confirmed Case(s) - No Quarantine

Tennessee Department of Agriculture

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown;
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West Nile Virus
Jefferson County, IN
Outbreak Identifier: 7840
Alert ID: 5414
November 05, 2026
Confirmed Case(s) - No Quarantine

Indiana State Board of Animal Health

Number Confirmed: 1; 
Number Exposed: Unknown; 

Horse 1: 
Age: 15; Gender: Mare; Breed: Haflinger; Onset of Clinical Signs: 10/13/2026; Clinical Signs: 4-limb ataxia; stumbling; muscle fasciculations; dragging front and rear hooves but also hypermetric in rear limbs; afebrile; CBC/Chem was normal; Confirmation Date: 10/27/2026; Horse Status: Recovering; Vaccination Status: Unvaccinated;
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West Nile Virus
Oklahoma County, OK
Outbreak Identifier: 7836
Alert ID: 5410
November 04, 2026
Confirmed Case(s) - No Quarantine

State Veterinarian

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

Horse 1: 
Age: Yearling; Gender: Filly; Breed: Thoroughbred (TB); Usage: Racing; Onset of Clinical Signs: 10/26/2026; Clinical Signs: Ataxic, fever, Muscle fasciculations. Clinical signs progressively worsened over a 24-hour period, followed by subsequent clinical improvement.; Horse Status: Recovering; Vaccination Status: Unvaccinated;
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West Nile Virus
Kay County, OK
Outbreak Identifier: 7835
Alert ID: 5409
November 04, 2026
Confirmed Case(s) - No Quarantine

State Veterinarian

Number Suspected: Unknown; 
Number Exposed: Unknown; 
Number Euthanized: 1; 
Facility Type: Training Facility; 

Horse 1: 
Age: 6; Gender: Gelding; Breed: Pony; Usage: Pet; Onset of Clinical Signs: 10/15/2026; Clinical Signs: Nystagmus, Tremors, lateral recumbency; Horse Status: Euthanized; Vaccination Status: Unvaccinated;
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West Nile Virus
Grant County, WI
Outbreak Identifier: 7832
Alert ID: 5406
November 02, 2026
Confirmed Case(s) - No Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

Number Confirmed: 1; 
Number Exposed: 35; 
Facility Type: Private Facility; 

Horse 1: 
Age: 2; Gender: Filly; Breed: Morgan; Onset of Clinical Signs: 10/8/2026; Clinical Signs: ataxia (4 limbs), muscle fasciculations (head and neck); Confirmation Date: 10/15/2026; Horse Status: Recovering; Vaccination Status: Unvaccinated;
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Eastern Equine Encephalitis, West Nile Virus
Columbia County, FL
Outbreak Identifier: 7830
Alert ID: 5405
November 02, 2026
Confirmed Case(s) - No Quarantine

Florida Department of Agriculture and Consumer Services

Number Confirmed: 1; 
Number Exposed: Unknown; 
Number Euthanized: 1; 
Comments: This is the 4th confirmed case of WNV for Florida in 2026. This horse was dual infected with EEE and WNV.;
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West Nile Virus
Williamson County, TN
Outbreak Identifier: 7817
Alert ID: 5392
October 28, 2026
Confirmed Case(s) - No Quarantine

Tennessee Department of Agriculture

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown;
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West Nile Virus
Monroe County, TN
Outbreak Identifier: 7816
Alert ID: 5391
October 28, 2026
Confirmed Case(s) - No Quarantine

Tennessee Department of Agriculture

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown;
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West Nile Virus
Wells County, IN
Outbreak Identifier: 7806
Alert ID: 5382
October 27, 2026
Confirmed Case(s) - No Quarantine

Indiana State Board of Animal Health

Number Confirmed: 1; 
Number Exposed: Unknown; 
Number Euthanized: 1; 

Horse 1: 
Age: 12; Gender: Mare; Breed: Standardbred; Onset of Clinical Signs: 9/25/2026; Clinical Signs: Down for several days Leaking urine Weak in hind end Would try to stand with front limbs and couldn't raise the hind end.; Confirmation Date: 10/20/2026; Horse Status: Euthanized; Vaccination Status: Unvaccinated;
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