Breaking News
National Equine Health Stakeholder Call-May 2025
Learn More

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.



Rogers County, OK
Outbreak Identifier: 6857
Alert ID: 4361
May 15, 2025
Confirmed Case(s) - Official Quarantine

State Veterinarian

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: 10; 
Number Euthanized: 1; 
Facility Type: Farm; 

Horse 1: 
Age: 4; Gender: Mare; Breed: Paint; Usage: Breeding; Onset of Clinical Signs: 5/2/2025; Clinical Signs: Hind limb weakness, urine retention, recumbency; Confirmation Date: 5/6/2025; Horse Status: Euthanized; 

Comments: All exposed horses are under quarantine and being monitored for clinical signs of disease. Horses will remain under quarantine until state requirements for quarantine release are met.;

Garvin County, OK
Outbreak Identifier: 6856
Alert ID: 4360
May 15, 2025
Confirmed Case(s) - Official Quarantine

State Veterinarian

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: 38; 
Number Euthanized: 1; 
Facility Type: Private Facility; 

Horse 1: 
Age: 5; Gender: Mare; Breed: Quarter Horse (QH); Usage: Barrel Racing; Clinical Signs: None; Confirmation Date: 4/29/2025; Horse Status: Euthanized; 

Comments: Affected horse was tested due to a trace from an off-premises exposure. The positive equine has been humanely euthanized and removed from the property. All exposed equine will remain quarantined until state testing requirements have been met.;

Grays Harbor County, WA
Outbreak Identifier: 6855
Alert ID: 4359
May 15, 2025
Confirmed Case(s) - No Quarantine

State Veterinarian Office and Attending Veterinarian

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

Eaton County, MI
Outbreak Identifier: 6741
Alert ID: 4358
May 12, 2025
Confirmed Case(s) - Voluntary Quarantine

Michigan Department of Agriculture and Rural Development

Number Confirmed: 3; 
Number Exposed: 2; 

Horse 1: 
Age: Yearling; Gender: Colt; Breed: Paint; Onset of Clinical Signs: 3/28/2025; Clinical Signs: fever, enlarged lymph nodes; Confirmation Date: 5/8/2025; Horse Status: Recovered; Vaccination Status: Unvaccinated;

Comments: Two ponies from the premises were reported by MDARD in February of 2025 as having strangles (Alert 4228). This is a third newly detected case from the property.; 
Previous Alerts: 4228

Marion County, FL
Outbreak Identifier: 6854
Alert ID: 4357
May 08, 2025
Confirmed Case(s) - Official Quarantine

FDACS Veterinary Medical Officer

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

Horse 1: 
Age: 7; Gender: Gelding; Breed: Thoroughbred (TB); Clinical Signs: Abscess; Confirmation Date: 5/5/2025; 

Comments: This is Florida's 18th case of Strangles for 2025;

Buffalo County, WI
Outbreak Identifier: 6853
Alert ID: 4356
May 07, 2025
Confirmed Case(s) - Voluntary Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

Number Confirmed: 1; 
Number Suspected: 1; 
Number Exposed: 2; 
Facility Type: Private Facility; 

Horse 1: 
Age: 2; Gender: Mare; Onset of Clinical Signs: 4/28/2025; Clinical Signs: Fever, submandibular lymph node abscess; Confirmation Date: 5/2/2025; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

Beaufort County, NC
Outbreak Identifier: 6852
Alert ID: 4355
May 07, 2025
Information Only

Veterinary Division of the North Carolina Dept of Agriculture

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

Cecil County, MD
Outbreak Identifier: 6851
Alert ID: 4354
May 06, 2025
Confirmed Case(s) - Official Quarantine

Maryland Department of Agriculture

Number Confirmed: 1; 
Number Exposed: 50;

Carroll County, MD
Outbreak Identifier: 6850
Alert ID: 4353
May 06, 2025
Confirmed Case(s) - Official Quarantine

Maryland Department of Agriculture

Number Confirmed: 1; 
Number Exposed: 20;

St Clair County, MI
Outbreak Identifier: 6849
Alert ID: 4352
May 06, 2025
Confirmed Case(s) - Voluntary Quarantine

Michigan Department of Agriculture and Rural Development

Number Confirmed: 2; 
Number Suspected: 2; 
Number Exposed: Unknown; 

Horse 1: 
Age: 5; Gender: Gelding; Breed: Paint; Onset of Clinical Signs: 4/24/2025; Clinical Signs: Fever, sore throat, nasal discharge; Confirmation Date: 5/5/2025; Horse Status: Recovering; Vaccination Status: Unvaccinated;

Horse 2: 
Age: 5; Gender: Gelding; Breed: Warmblood (WB); Onset of Clinical Signs: 4/24/2025; Clinical Signs: Fever, sore throat, nasal discharge, cough; Confirmation Date: 5/5/2025; Horse Status: Recovering; Vaccination Status: Unvaccinated;