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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.



Strangles
Eaton County, MI
Outbreak Identifier: 6741
Alert ID: 4228
February 21, 2025
Confirmed Case(s) - Voluntary Quarantine

Michigan Department of Agriculture and Rural Development

Number Confirmed: 2; 
Number Exposed: Unknown; 

Horse 1: 
Age: 13; Gender: Mare; Breed: Pony; Onset of Clinical Signs: 2/15/2025; Clinical Signs: Fever, nasal discharge; Confirmation Date: 2/19/2025; Horse Status: Recovering; Vaccination Status: Status Unknown;
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Strangles
Genesee County, MI
Outbreak Identifier: 6740
Alert ID: 4227
February 21, 2025
Confirmed Case(s) - Voluntary Quarantine

Michigan Department of Agriculture and Rural Development

Number Confirmed: 1; 
Number Suspected: 2; 
Number Exposed: 1; 

Horse 1: 
Age: 20; Gender: Gelding; Breed: Grade; Onset of Clinical Signs: 2/13/2025; Clinical Signs: Nasal discharge, swollen lymph nodes, lethargy; Confirmation Date: 2/19/2025; Horse Status: Recovering; Vaccination Status: Unvaccinated;
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Equine Herpesvirus- Neurologic
San Bernardino County, CA
Outbreak Identifier: 6723
Alert ID: 4226
February 18, 2025
Quarantine Released

California Department of Food and Agriculture

Number Confirmed: 2; 
Number Exposed: 35; 
Number Euthanized: 1; 
Comments: No additional case was confirmed during the quarantine monitoring period. The quarantine period has been fully completed and is officially released.; 
Previous Alerts: 4209
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Equine Herpesvirus- Abortion
Box Elder County, UT
Outbreak Identifier: 6739
Alert ID: 4225
February 15, 2025
Confirmed Case(s) - Official Quarantine

Utah Department of Agriculture and Food

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Comments: For more information about EHV-1 visit https://www.equinediseasecc.org/equine-herpesvirus;
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Equine Herpesvirus- Neurologic
Duchesne County, UT
Outbreak Identifier: 6738
Alert ID: 4224
February 15, 2025
Confirmed Case(s) - Official Quarantine

Utah Department of Agriculture and Food

Number Confirmed: 2; 
Number Suspected: Unknown; 
Number Exposed: Unknown;
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Equine Influenza
Orange County, FL
Outbreak Identifier: 6737
Alert ID: 4223
February 14, 2025
Confirmed Case(s) - Voluntary Quarantine

Attending Veterinarian

Number Confirmed: 1; 
Number Suspected: 19; 
Number Exposed: Unknown; 
Facility Type: Boarding Facility;
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Equine Influenza
Albany County, WY
Outbreak Identifier: 6736
Alert ID: 4222
February 14, 2025
Confirmed Case(s) - Voluntary Quarantine

Attending Veterinarian

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Facility Type: Boarding Facility;
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Strangles
Okaloosa County, FL
Outbreak Identifier: 6735
Alert ID: 4221
February 13, 2025
Confirmed Case(s) - Official Quarantine

FDACS Veterinary Medical Officer

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

Horse 1: 
Age: 3; Gender: Gelding; Breed: Mustang; Onset of Clinical Signs: 2/7/2025; Clinical Signs: Submandibular swelling, purulent nasal discharge, fever; Horse Status: Affected And Alive; Vaccination Status: Vaccinated;

Comments: This is Florida's 8th confirmed case of Strangles in 2025;
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Strangles
City of Kawartha Lakes, ON
Outbreak Identifier: 6734
Alert ID: 4220
February 11, 2025
Confirmed Case(s) - Voluntary Quarantine

OMAFA

Number Confirmed: 1; 
Number Exposed: 3; 
Facility Type: Private Facility; 

Horse 1: 
Age: 29; Gender: Mare; Onset of Clinical Signs: 2/1/2025; Clinical Signs: Submandibular abscess was noted on Feb 1. This mare nor any of the other horses have been off the property and there are no new horses.; Horse Status: Recovering; 

Comments: The farm owner is working with their veterinarian on voluntary animal movement restrictions and biosecurity. 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.;
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Strangles
Regional Municipality of York, ON
Outbreak Identifier: 6733
Alert ID: 4219
February 11, 2025
Confirmed Case(s) - Voluntary Quarantine

OMAFA

Number Confirmed: 1; 
Number Exposed: 3; 

Horse 1: 
Gender: Mare; Breed: Standardbred; Onset of Clinical Signs: 2/3/2025; Clinical Signs: This mare was transported to the farm from a dealer two weeks prior to showing signs. This mare and three other new horses were fortunately placed in a quarantine paddock. On Feb 3, this mare developed a mucopurolent nasal discharge and fever (39.5 C) and tested positive for S.equi.; Horse Status: Recovering; 

Comments: The facility owner is working with their veterinarian on voluntary animal movement restrictions and biosecurity. 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.;
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