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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.



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;

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.;

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.;

San Bernardino County, CA
Outbreak Identifier: 6724
Alert ID: 4218
February 11, 2025
Outbreak Update

Number Confirmed: 2; 
Number Exposed: 90; 
Number Euthanized: 1; 
Comments: A 7-year-old gelding with fever and mild neurological clinical signs was confirmed positive for Equine Herpesvirus Myeloencephalopathy (EHM) secondary to Equine Herpesvirus-1 (EHV-1). The gelding is alive and under supportive care at the home premises. CDFA continues to actively monitor the situation.; 
Previous Alerts: 4208

Clay County, FL
Outbreak Identifier: 6732
Alert ID: 4217
February 11, 2025
Confirmed Case(s) - Official Quarantine

FDACS Veterinary Medical Officer

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

Horse 1: 
Age: 8; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 2/5/2025; Clinical Signs: Swelling, draining abscess, fever; Confirmation Date: 2/8/2025; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;

Comments: This is Florida's 7th confirmed case of Strangles for 2025.;

Palm Beach County, FL
Outbreak Identifier: 6730
Alert ID: 4215
February 10, 2025
Confirmed Case(s) - Official Quarantine

FDACS Veterinary Medical Officer

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

Horse 1: 
Onset of Clinical Signs: 2/8/2025; Clinical Signs: Nasal Discharge and fever; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;

Comments: This is Florida's 6th case of Strangles in 2025;

Lewis County, WA
Outbreak Identifier: 6729
Alert ID: 4214
February 10, 2025
Confirmed Case(s) - No Quarantine

State Veterinarian Office and attending veterinarian

Number Confirmed: 1; 
Number Exposed: 4; 
Number Euthanized: 1; 
Facility Type: Farm; 

Horse 1: 
Age: 2; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Pleasure Riding; Onset of Clinical Signs: 1/29/2025; Clinical Signs: Fever, colitis, lethargy; Confirmation Date: 2/6/2025; Horse Status: Euthanized; Vaccination Status: Unvaccinated;

Marion County, FL
Outbreak Identifier: 6728
Alert ID: 4213
February 09, 2025
Confirmed Case(s) - Official Quarantine

FDACS Veterinary Medical Officer

Number Suspected: 1; 
Number Exposed: 7; 
Facility Type: Private Facility; 

Horse 1: 
Age: 16; Gender: Gelding; Breed: Quarter Horse (QH); Clinical Signs: Purulent nasal discharge and fever; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

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

Région Capitale Nationale, QC
Outbreak Identifier: 6727
Alert ID: 4212
February 04, 2025
Confirmed Case(s) - No Quarantine

MAPAQ

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

Muskegon County, MI
Outbreak Identifier: 6726
Alert ID: 4211
February 03, 2025
Confirmed Case(s) - Voluntary Quarantine

Michigan Department of Agriculture and Rural Development

Number Confirmed: 1; 

Horse 1: 
Age: 1; Gender: Filly; Breed: Standardbred; Clinical Signs: mandibular abscess; Confirmation Date: 1/31/2025; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;

Comments: Owner acquired the horse on January 28, 2025, and is unsure when the filly first became ill or if she could have been vaccinated against strangles.;