Disease Alerts

Number Confirmed: 1; 
Number Suspected: 1; 
Number Exposed: 4; 
Facility Type: Private Facility; 

Horse 1: 
Age: Yearling; Gender: Filly; Breed: Draft; Clinical Signs: intermittent low-grade fever, mild intermittent respiratory signs since acquiring ~4 months ago; Confirmation Date: 2/2/2026; Horse Status: Affected And Alive; Vaccination Status: Vaccinated;

Number Confirmed: 1; 
Number Exposed: 12; 
Facility Type: Private Facility; 

Horse 1: 
Age: 12; Gender: Mare; Breed: Miniature Horse; Clinical Signs: nasal discharge, mandibular lymphadenopathy/drainage; Confirmation Date: 2/6/2026; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

Comments: Acquired from a kill pen ~ 4 weeks ago along with another mini;

Number Confirmed: 1; 
Number Exposed: 50;

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

Horse 1: 
Age: 10; Gender: Gelding; Breed: Quarter Horse (QH); Clinical Signs: This gelding developed an acute fever followed by a unilateral swelling behind the jaw which was painful to the touch. Nasopharyngeal swab was positive for S. equi by PCR. He has been isolated.; Confirmation Date: 2/2/2026; 

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;

Number Confirmed: 1; 
Number Suspected: 27; 
Number Exposed: 27; 
Facility Type: Training Facility;

Number Confirmed: 1; 
Number Suspected: 1; 
Number Exposed: 26; 
Facility Type: Private Facility; 

Horse 1: 
Age: 15; Gender: Gelding; Breed: Thoroughbred (TB); Usage: Pleasure Riding; Onset of Clinical Signs: 1/30/2026; Confirmation Date: 2/6/2026; Horse Status: Quarantined; Vaccination Status: Status Unknown;

Number Confirmed: 1; 
Number Suspected: 1; 
Number Exposed: 26; 
Facility Type: Private Facility; 

Horse 1: 
Age: 15; Gender: Gelding; Breed: Thoroughbred (TB); Usage: Pleasure Riding; Onset of Clinical Signs: 1/30/2026; Clinical Signs: Nasal Discharge Pleuropneumonia Febrile; Confirmation Date: 2/6/2026; Horse Status: Quarantined; Vaccination Status: Status Unknown;

Number Confirmed: 1; 
Number Exposed: 12; 
Number Euthanized: 1; 
Facility Type: Training Facility; 
Comments: Testing of exposed horses on premises is pending; 
Previous Alerts: 4865

Number Confirmed: 1; 
Number Suspected: 4; 
Number Exposed: Unknown; 
Facility Type: Boarding Facility; 

Horse 1: 
Onset of Clinical Signs: 1/20/2026; Clinical Signs: The index case had fever and nasal discharge and subsequently tested positive for Strep equi on nasopharyngeal wash PCR. Four other horses have shown clinical signs of strangles including fever, nasal discharge, and guttural pouch empyema, but have been negative on PCR of guttural pouch fluid.; Horse Status: Quarantined; Vaccination Status: Vaccinated;

Number Confirmed: 1; 
Facility Type: Equine Clinic; 

Horse 1: 
Age: 27; Gender: Gelding; Breed: Draft-cross; Usage: Pleasure Riding; Onset of Clinical Signs: 1/29/2026; Clinical Signs: After several days of low-grade colic managed on the farm in Montgomery County, MD, the gelding was referred to an equine hospital in Loudoun County, VA where he underwent colic surgery for a colon displacement and impaction. Routine fecal culture submitted following surgery tested positive for salmonella.; Horse Status: Recovering;