Disease Alerts

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

Horse 1: 
Age: Suckling Foal; Gender: Colt; Breed: Quarter Horse (QH); Onset of Clinical Signs: 3/10/2025; Clinical Signs: Fever, lethargy; Confirmation Date: 3/12/2025; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

Number Confirmed: 1; 
Number Suspected: 4; 

Horse 1: 
Age: 3; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 1/29/2025; Clinical Signs: Fever; Confirmation Date: 2/5/2025; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

Number Confirmed: 1; 
Number Exposed: 5; 
Facility Type: Private Facility; 

Horse 1: 
Age: 23; Gender: Mare; Breed: Tennessee Walking Horses; Usage: Pleasure Riding; Onset of Clinical Signs: 3/10/2025; Clinical Signs: Fever, Nasal Discharge, Inappetance, Lethargy; Confirmation Date: 3/12/2025; Horse Status: Recovering; Vaccination Status: Unvaccinated;

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

Horse 1: 
Age: 10; Gender: Gelding; Breed: Friesian; Onset of Clinical Signs: 3/6/2025; Clinical Signs: The horse presented to the referring veterinarian for fever, with temperatures up to 104.7 F. He was subsequently referred to a hospital and admitted into the isolation unit with improving clinical signs. He tested positive for EHV-4 on PCR of nasal swab; Confirmation Date: 3/11/2025; Horse Status: Isolated; Vaccination Status: Status Unknown;

Number Confirmed: 1; 
Number Exposed: 11; 

Horse 1: 
Age: 3; Gender: Filly; Onset of Clinical Signs: 3/6/2025; Clinical Signs: Nasal discharge, lethargy, inappetance; Confirmation Date: 3/7/2025; Vaccination Status: Status Unknown;

Number Confirmed: 16; 
Number Exposed: Unknown; 
Comments: On February 7, 2025, positive equine infectious anemia (EIA) results were confirmed by the Canadian Food Inspection Agency’s (CFIA) national reference laboratory for 16 horses located on a premises in the rural municipality of Meadow Lake, Saskatchewan. The horses had been tested by the CFIA as part of an on-going disease investigation. No clinical signs of disease were noted at the time of sampling. The infected horses have a history of commingling with free-roaming horses in an area where the disease is endemic. A CFIA investigation is underway and as per program policy, movement controls have been placed on the infected horses and any on-premises contact animals. 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.;

Number Confirmed: 52; 
Number Exposed: 145; 
Comments: For more information, please see https://www.aphis.usda.gov/livestock-poultry-disease/equine/contagious-equine-metritis
Previous Alerts: 4194, 4156, 4102, 4052, 4004, 3978, 3893, 3859, 3815, 3805, 3776, 3748, 3741, 3732

Number Confirmed: 2; 
Number Exposed: 90; 
Comment:  No additional cases were confirmed during the quarantine monitoring period. The quarantine period has been fully completed and was officially released on February 26th. Previous Alerts: 4226

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

Horse 1: 
Age: 18; Gender: Mare; Breed: Appaloosa; Clinical Signs: This mare became febrile and was promptly isolated. She developed multiple abscesses on the head and had repeated fevers. Culture and PCR were positive for S. equi. No other horses on the farm are affected.; 

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.;

Number Confirmed: 2; 
Number Exposed: Unknown; 
Number Euthanized: 2; 
Facility Type: Private Facility; 

Horse 1: 
Age: 7; Gender: Mare; Breed: Thoroughbred (TB); Clinical Signs: This mare developed ataxia that progressed and she was subsequently euthanized. The following day, in a separate barn, another mare became acutely neurologic and recumbent. She was also euthanized. No other horses have displayed neurologic signs however there have been a few horses with a fever. PCR testing on both neurologic mares confirmed EHV-1 infection.; 

Comments: The facility owner has instituted voluntary animal movement restrictions and biosecurity procedures. To see past and present EHV-1 neurologic (EHM) cases in Ontario go to: https://www.oahn.ca/resources/ontario-equine-disease-alerts/ and enter the disease surveillance portal.;;