Breaking News
EDCC March 2025 Statistics
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.



Santa Barbara County, CA
Outbreak Identifier: 6777
Alert ID: 4294
April 04, 2025
Quarantine Released

California Department of Food and Agriculture

Number Confirmed: 1; 
Number Exposed: 41; 
Comments: No additional case was confirmed during the quarantine monitoring period. The quarantine period has been fully completed and is officially released.; 
Previous Alerts: 4271

Polk County, FL
Outbreak Identifier: 6796
Alert ID: 4293
April 04, 2025
Confirmed Case(s) - Official Quarantine

FDACS Veterinary Medical Officer

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

Horse 1: 
Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 3/27/2025; Confirmation Date: 4/2/2025; 

Comments: This is Florida's 12th confirmed case of Strangles for 2025;

Ventura County, CA
Outbreak Identifier: 6771
Alert ID: 4292
April 03, 2025
Quarantine Released

California Department of Food and Agriculture

Number Confirmed: 1; 
Number Exposed: 38; 
Comments: No additional case was confirmed during the quarantine monitoring period. The quarantine period has been fully completed and is officially released.; 
Previous Alerts: 4264

Macomb County, MI
Outbreak Identifier: 6795
Alert ID: 4291
April 03, 2025
Confirmed Case(s) - Voluntary Quarantine

Michigan Department of Agriculture and Rural Development

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

Horse 1: 
Age: Suckling Foal; Gender: Colt; Breed: Quarter Horse (QH); Onset of Clinical Signs: 3/15/2025; Clinical Signs: Enlarged lymph nodes and fever, progressing to lethargy, hindlimb weakness, and recumbency and "dog sitting".; Confirmation Date: 4/1/2025; Horse Status: Euthanized; Vaccination Status: Unvaccinated;

Rocky View County, AB
Outbreak Identifier: 6794
Alert ID: 4290
April 03, 2025
Confirmed Case(s) - Voluntary Quarantine

Attending veterinarian

Number Confirmed: 1; 
Facility Type: Boarding Facility; 

Horse 1: 
Clinical Signs: Fever, cough, nasal discharge; Horse Status: Recovering; Vaccination Status: Vaccinated;

Alameda County, CA
Outbreak Identifier: 6793
Alert ID: 4289
April 02, 2025
Confirmed Case(s) - Official Quarantine

California Department of Food and Agriculture

Number Confirmed: 1; 
Number Exposed: 75; 

Horse 1: 
Age: 22; Gender: Mare; Breed: Trakhener; Clinical Signs: ataxia, limb edema, trouble urinating; 

Comments: A 22-year-old Trakehner mare from Alameda County displaying neurologic signs was confirmed positive for Equine Herpesvirus Myeloencephalopathy (EHM) secondary to Equine Herpesvirus-1 (EHV-1). The mare is currently under veterinary care at an off-site veterinary hospital and is showing daily improvement clinically. Seventy-five (75) potentially exposed horses at the home premise in Alameda County were quarantined on April 1st with enhanced biosecurity measures implemented. CDFA has been onsite and will continue to actively monitor the situation.;

Carter County, OK
Outbreak Identifier: 6792
Alert ID: 4288
April 01, 2025
Confirmed Case(s) - Official Quarantine

State Veterinarian

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: 70; 
Number Euthanized: 1; 
Facility Type: Training Facility; 

Horse 1: 
Age: 5; Gender: Mare; Breed: Quarter Horse (QH); Usage: Barrel Racing; Clinical Signs: Routine testing was performed on 2/21/2025 before transporting to a training facility. Initial results were returned as positive, and subsequent testing confirmed the diagnosis of EIA on 3/6/2025.; Confirmation Date: 3/6/2025; Horse Status: Euthanized; 

Comments: Trace back has been initiated. 30 of the 70 exposed horses have tested negative. 40 of the horses have tested negative on their first test. Final test will be performed on or about 5/10/2025.;

San Joaquin County, CA
Outbreak Identifier: 6791
Alert ID: 4287
April 01, 2025
Outbreak Update

California Department of Food and Agriculture

Number Confirmed: 2; 
Number Exposed: 27; 
Number Euthanized: 2; 
Comments: A confirmed EIA positive equid must be euthanized or quarantined for life 200 yards away from any EIA negative equid as per USDA EIA program rules. Euthanasia was elected for these two cases and was witnessed by CDFA veterinarians on March 25, 2025. The remaining twenty-three (23) potentially exposed horses and the four (4) dam’s side foals on the home premises will remain under quarantine until their sixty (60) day retest.;

San Bernardino County, CA
Outbreak Identifier: 6710
Alert ID: 4286
April 01, 2025
Quarantine Released

California Department of Food and Agriculture

Number Confirmed: 1; 
Number Exposed: 18; 
Comments: The eighteen (18) potentially exposed horses on this premises tested negative on their sixty (60) day retest. Quarantine on this premises has been released.; 
Previous Alerts: 4191

Miami-Dade County, FL
Outbreak Identifier: 6790
Alert ID: 4285
March 28, 2025
Confirmed Case(s) - Official Quarantine

FDACS Veterinary Medical Officer

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

Horse 1: 
Age: 6; Gender: Gelding; Breed: Quarter Horse (QH); Confirmation Date: 3/26/2025; Horse Status: Deceased; Vaccination Status: Unvaccinated;

Comments: This is Florida's 1st confirmed case of rabies in livestock for 2025;;