Strangles (Streptococcus equi) has been confirmed at a farm in District of Algoma, Ontario. On October 20, 2026, a 5 year old Quarter Horse gelding presented with a draining submandibular abscess. S. equi was confirmed on October 22, 2026. The horse was not vaccinated against Strangles. Six additional horses were exposed.
The facility manager, 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.