Strangles (Streptococcus equi) has been confirmed in Grey County, Ontario. A 14 year old Quarter Horse mare developed abscessed submandibular lymph nodes and was diagnosed with Strangles on January 6, 2026. Two other horses from the same paddock have draining lymph nodes and one other horse from the same paddock has mild clinical signs.
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.