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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.



Multiple Parishes County, LA
Outbreak Identifier: 6918
Alert ID: 4432
July 18, 2025
Confirmed Case(s) - No Quarantine

Louisiana Disease Diagnostic Laboratory (LSU Diagnostics, LADDL)

Number Confirmed: 11; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Facility Type: Farm; 
Comments: The horse serum was presented to the Louisiana Animal Diagnostic Laboratory from Multiple Parishes in the State of Louisiana. One of the horses tested positive for West Nile Virus as well.;

Washtenaw County, MI
Outbreak Identifier: 6917
Alert ID: 4431
July 18, 2025
Confirmed Case(s) - Voluntary Quarantine

Michigan Department of Agriculture and Rural Development

Number Confirmed: 1; 
Number Exposed: Unknown; 

Horse 1: 
Age: 19; Gender: Gelding; Breed: Thoroughbred (TB); Onset of Clinical Signs: 6/26/2025; Clinical Signs: Fever, nasal discharge; Confirmation Date: 7/2/2025; Horse Status: Recovering; Vaccination Status: Vaccinated;

Berrien County, MI
Outbreak Identifier: 6916
Alert ID: 4430
July 18, 2025
Confirmed Case(s) - Voluntary Quarantine

Michigan Department of Agriculture and Rural Development

Number Confirmed: 1; 
Number Exposed: 3; 

Horse 1: 
Age: 16; Gender: Mare; Breed: Other; Onset of Clinical Signs: 7/13/2025; Clinical Signs: Abscess, wt loss, decreased appetite; Confirmation Date: 7/16/2025; Horse Status: Recovering; Vaccination Status: Status Unknown;

Brevard County, FL
Outbreak Identifier: 6915
Alert ID: 4429
July 11, 2025
Confirmed Case(s) - Official Quarantine

FDACS Veterinary Medical Officer

Number Confirmed: 1; 
Number Suspected: 1; 
Number Exposed: 6; 
Facility Type: Boarding Facility; 

Horse 1: 
Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 7/1/2025; Clinical Signs: Fever, nasal discharge, lymph node abscess; Confirmation Date: 7/10/2025; Horse Status: Recovering; Vaccination Status: Unvaccinated;

Comments: This is Florida's 23rd case of Strangles for 2025;

Surrey, BC
Outbreak Identifier: 6914
Alert ID: 4428
July 11, 2025
Confirmed Case(s) - Official Quarantine

Canadian Food Inspection Agency

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Comments: On July 9, 2025, positive equine infectious anemia (EIA) results were confirmed by the Canadian Food Inspection Agency’s (CFIA) national reference laboratory for a horse located on a premises in Surrey, British Columbia. The horse had been tested by an accredited veterinarian at the owner’s request to fulfill a facility biosecurity requirement. No clinical signs of disease were noted by the veterinarian at the time of sampling. A CFIA investigation is underway and as per program policy, movement controls have been placed on the infected horse and any on-premises contact animals. Initial reports indicate there are other equines on the affected premises. Movement controls will remain until all disease response activities have been completed, including follow-up testing and ordering the destruction of confirmed cases. Trace-out activities may require the CFIA to undertake actions at additional premises as outlined in the current policy. Improved biosecurity protocols have been strongly recommended to the owners to help control the ongoing spread of EIA and protect our national herd.;

Kawartha Lakes, ON
Outbreak Identifier: 6913
Alert ID: 4427
July 10, 2025
Confirmed Case(s) - Voluntary Quarantine

OMAFA

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

Horse 1: 
Age: 6; Gender: Mare; Breed: Quarter Horse (QH); Clinical Signs: This mare developed a unilateral swollen lymph node. An aspirate from the node and a nasopharyngeal swab were positive for S. equi; 

Comments: The facility owner, working with their veterinarian, has instituted voluntary animal movement restrictions and biosecurity protocols. To see past and present Strangles cases in Ontario go to: https://www.oahn.ca/resources/ontario-equine-disease-alerts/ and enter the disease surveillance portal;;

Madison County, FL
Outbreak Identifier: 6912
Alert ID: 4426
July 09, 2025
Confirmed Case(s) - No Quarantine

FDACS Veterinary Medical Officer

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

Horse 1: 
Age: Yearling; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 6/30/2025; Clinical Signs: Neurologic; Confirmation Date: 7/3/2025; Horse Status: Euthanized; Vaccination Status: Unvaccinated;

Comments: This is Florida's 5th confirmed case of EEE for 2025.;

Pacific County, WA
Outbreak Identifier: 6911
Alert ID: 4425
July 09, 2025
Confirmed Case(s) - No Quarantine

State Veterinarian Office and Attending Veterinarian

Number Confirmed: 1; 
Facility Type: Private Facility;

Oconto county, WI
Outbreak Identifier: 6910
Alert ID: 4424
July 08, 2025
Suspected Case - Voluntary Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

Number Suspected: Unknown; 
Number Exposed: 12; 
Facility Type: Private Facility; 

Horse 1: 
Age: 29; Breed: Miniature Horse; Onset of Clinical Signs: 6/23/2025; Clinical Signs: Submandibular lymphadenopathy; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

Comments: No testing was performed;

Douglas County, CO
Outbreak Identifier: 6909
Alert ID: 4423
July 03, 2025
Confirmed Case(s) - No Quarantine

State Veterinarian

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

Horse 1: 
Age: 6; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Horse Show; Onset of Clinical Signs: 6/30/2025; Clinical Signs: Grade 3-4 Ataxia of hind limbs.; Confirmation Date: 7/3/2025; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;