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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.

Strangles
Miami-Dade County, FL
Outbreak Identifier: 7837
Alert ID: 5411
November 04, 2026
Confirmed Case(s) - Official Quarantine

Florida Department of Agriculture and Consumer Services

Number Confirmed: 2; 
Comments: This is the 29th confirmed case of strangles for Florida in 2026;
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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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Equine Herpesvirus- Neurologic
Los Angeles County, CA
Outbreak Identifier: 7834
Type: EHV-1
Alert ID: 5408
November 03, 2026
Quarantine Released

California Department of Food and Agriculture

Number Confirmed: 1; 
Number Exposed: 37; 
Comments: No additional case were confirmed during the quarantine monitoring period. The quarantine period has been fully completed and is officially released.;
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Vesicular Stomatitis
Mesa and Delta County, CO
Outbreak Identifier: 7833
Alert ID: 5407
November 02, 2026
Confirmed Case(s) - Official Quarantine

USDA-APHIS-Veterinary Services

Comments: Since the last VSV situation report (9/18/2026), 1 VSV-confirmed positive equine premises has been identified in Mesa County, Colorado (New Affected County) and 1 new VSV-presumptive positive equine premises has been quarantined in Delta County, Colorado. All confirmed cases in the 2025-26 outbreak have been vesicular stomatitis New Jersey virus (VSNJV) serotype. Updates are as follows: Colorado • Delta County – 1 new presumptive positive equine premises • Mesa County (New Affected County) – 1 confirmed positive equine premises • Since the last situation report (9/18/2026), 3 previously VSV-affected premises have been released from quarantine, 1 in Delta County and 2 in Montezuma County.;
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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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Pigeon Fever
Crook County, OR
Outbreak Identifier: 7829
Alert ID: 5404
October 31, 2026
Suspected Case - Official Quarantine

State Department of Agriculture

Number Suspected: 1; 
Number Exposed: 4;
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Pigeon Fever
Jefferson County, OR
Outbreak Identifier: 7828
Alert ID: 5403
October 30, 2026
Suspected Case - Official Quarantine

State Department of Agriculture

Number Suspected: 1; 
Number Exposed: 3;
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Pigeon Fever
Deschutes County, OR
Outbreak Identifier: 7827
Alert ID: 5402
October 30, 2026
Suspected Case - Official Quarantine

State Department of Agriculture

Number Suspected: 1; 
Number Exposed: 9;
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