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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.



West Nile Virus
Carter and Love County, OK
Outbreak Identifier: 7192
Alert ID: 4716
November 18, 2025
Confirmed Case(s) - No Quarantine

State Veterinarian

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

Horse 1: 
Age: 3; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Ranch work; Onset of Clinical Signs: 10/16/2025; Clinical Signs: Anxiety, muscle and muzzle fasciculations, Grade 2/5 ataxia, fever; Horse Status: Recovered; Vaccination Status: Unvaccinated;

Comments: Horse lives in Carter County but travels to Love County daily for work;
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West Nile Virus
Kiowa County, OK
Outbreak Identifier: 7191
Alert ID: 4715
November 18, 2025
Confirmed Case(s) - No Quarantine

State Veterinarian

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

Horse 1: 
Age: 5; Gender: Mare; Breed: Appaloosa; Usage: Breeding; Onset of Clinical Signs: 10/20/2025; Clinical Signs: Ataxia, loss of balance, falling forward; Confirmation Date: 11/4/2025; Horse Status: Unknown; Vaccination Status: Unvaccinated;
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West Nile Virus
Lincoln County, TN
Outbreak Identifier: 7184
Alert ID: 4708
November 07, 2025
Confirmed Case(s) - No Quarantine

Tennessee Department of Agriculture

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Facility Type: Farm;
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West Nile Virus
Oklahoma County, OK
Outbreak Identifier: 7182
Alert ID: 4706
November 06, 2025
Confirmed Case(s) - No Quarantine

State Veterinarian

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

Horse 1: 
Age: Yearling; Gender: Filly; Breed: Quarter Horse (QH); Onset of Clinical Signs: 10/24/2025; Clinical Signs: Lameness that progressed to lateral recumbency and unable to rise. Facial muscle fasciculations.; Horse Status: Euthanized; Vaccination Status: Unvaccinated;
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West Nile Virus
Nowata County, OK
Outbreak Identifier: 7181
Alert ID: 4705
November 06, 2025
Confirmed Case(s) - No Quarantine

State Veterinarian

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

Horse 1: 
Age: 17; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Pleasure Riding; Onset of Clinical Signs: 10/21/2025; Clinical Signs: Hypermetric on front, painful neck, muscle fasciculations, painful withers; Confirmation Date: 10/28/2025; Horse Status: Recovered; Vaccination Status: Unvaccinated;
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West Nile Virus
Ada County, ID
Outbreak Identifier: 7174
Alert ID: 4698
November 05, 2025
Information Only

State Veterinarian

Number Confirmed: 1; 
Number Exposed: Unknown; 

Horse 1: 
Age: 2; Gender: Mare; Breed: Mustang; Onset of Clinical Signs: 10/29/2025; Clinical Signs: Acute ataxia all four limbs, lethargy; Confirmation Date: 11/4/2025; Horse Status: Affected And Alive; Vaccination Status: Vaccinated;
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West Nile Virus
Marshall County, TN
Outbreak Identifier: 7173
Alert ID: 4697
November 05, 2025
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
Brazos County, TX
Outbreak Identifier: 7169
Alert ID: 4693
November 01, 2025
Confirmed Case(s) - No Quarantine

Attending Veterinarian

Number Confirmed: 2; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Facility Type: Veterinary Hospital; 
Comments: Two independent cases; not located on the same .farm;
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West Nile Virus
Allen County, IN
Outbreak Identifier: 7166
Alert ID: 4690
October 31, 2025
Confirmed Case(s) - No Quarantine

Indiana State Board of Animal Health

Number Confirmed: 1; 
Number Exposed: Unknown; 

Horse 1: 
Age: 2; Gender: Mare; Breed: Standardbred; Onset of Clinical Signs: 10/20/2025; Clinical Signs: Ataxia, muscle fasciculations, hindlimb weakness, unstable on feet, hypersensitivity/reactivity to light and sound stimuli.; Confirmation Date: 10/29/2025; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;
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West Nile Virus
Weld County, CO
Outbreak Identifier: 7163
Alert ID: 4686
October 29, 2025
Confirmed Case(s) - No Quarantine

State Veterinarian

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

Horse 1: 
Age: 3; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 10/21/2025; Clinical Signs: Ataxia Fasciculation; Confirmation Date: 10/29/2025; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;
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