Eastern Equine Encephalitis (EEE) has been confirmed in Hastings County, Ontario. A 4 year old Miniature Horse stallion was normal on September 10, 2024. On the morning of September 11, 2024 he began to stand off by himself, and then became febrile, recumbent and was seizuring, salivating/foaming at the mouth, and blind. The horse was euthanized. Infection with EEE was confirmed on September 23, 2024. The horse was not vaccinated against EEE. Three additional horses were exposed. This is the 18th case of equine EEE in Ontario this year.