Strangles (Streptococcus equi) has been confirmed at a boarding facility in Simcoe County, Ontario. On April 18, 2026, a 10 year old Draft-cross Mare presented with a draining submandibular abscess. Infection with S. equi was confirmed on April 21, 2026. 4 additional horses were exposed.
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.