Disease Alerts

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: 3; 
Number Euthanized: 1; 

Horse 1: 
Age: 1; Gender: Stallion; Breed: Quarter Horse (QH); Onset of Clinical Signs: 8/13/2026; Clinical Signs: Unsteady, falls, trembling; Horse Status: Euthanized; Vaccination Status: Undervaccinated;

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

Horse 1: 
Age: 1; Gender: Mare; Breed: Paint; Onset of Clinical Signs: 8/31/2026; Clinical Signs: Ataxia, Abnormal Mentation, Cranial Nerve Deficits, Fasciculation, Partial seizures; Confirmation Date: 9/1/2026; Horse Status: Euthanized; Vaccination Status: Vaccinated;

Comments: Horse rapidly declined, owner chose euthanasia.;

Number Confirmed: 1; 
Number Exposed: 2; 
Number Euthanized: 1; 
Comments: Diagnosed/reported 8/30/26;

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

Horse 1: 
Age: 4; Gender: Mare; Breed: Standardbred; Onset of Clinical Signs: 8/18/2026; Clinical Signs: fever, ataxia, lateral recumbency, seizure-like activity; Confirmation Date: 8/27/2026; Horse Status: Euthanized; Vaccination Status: Unvaccinated;

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

Horse 1: 
Age: Suckling Foal; Gender: Colt; Breed: Standardbred; Onset of Clinical Signs: 8/24/2026; Clinical Signs: This 4 month old foal developed respiratory distress and was diagnosed with a retropharyngeal lymph node abscess, which was drained and the foal is recovering. Streptococcus equi was cultured from the abscess.; Horse Status: Recovering; 

Comments: The owner, working with their veterinarian, has implemented 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 Exposed: Unknown; 
Number Euthanized: 1; 
Comments: No WNV vaccination history;

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

Horse 1: 
Age: 5; Gender: Mare; Breed: Quarter Horse Cross; Onset of Clinical Signs: 8/21/2026; Clinical Signs: This mare developed neurologic signs (muscle fasciculations, mild ataxia) on August 21. She is recovering with treatment. Serum was positive for WNV IgM.; Horse Status: Recovering; Vaccination Status: Unvaccinated;

Comments: This is the second confirmed case of equine WNV in Ontario this year . To see past and present WNV cases in Ontario go to: https://www.oahn.ca/resources/ontario-equine-disease-alerts/ and enter the disease surveillance portal.;;

Number Confirmed: 1; 

Horse 1: 

Age: 16; Gender: Gelding; Breed: Quarter Horse; Use: Pleasure Riding; Onset of Clinical Signs: 8/19/2026; Confirmation Date: 8/27/2026; Clinical Signs: ataxia, extreme somnolence, nystagmus, stumbling; Horse Status: Euthanized; Date Euthanized: 8/20/2026; Vaccination Status: Undervaccinated. 
Number Exposed: Unknown; 
Number Euthanized: 1; 
Facility Type: Private Facility; 
Comments: This is the 6th confirmed case of EEE for Florida in 2026; Positive for both EEE and WNV.

Number Confirmed: 1; 
Number Exposed: 8; 
Facility Type: Private Facility; 
Comments: This is the 21st confirmed case of strangles for Florida in 2026.;

Number Confirmed: 1; 
Number Exposed: 2; 
Facility Type: Private Facility; 
Comments: This is the 22nd confirmed case of strangles for Florida in 2026.;