Tragic Outbreak in Ontario

The equestrian community in Ontario has been shaken as two horses recently tested positive for Eastern equine encephalitis (EEE). These devastating cases emerged from the Regional Municipality of Halton and Renfrew County.

Heartbreaking Decisions

In Halton, a 16-year-old unvaccinated draft mare showed severe neurological symptoms on August 21 and was euthanized the very next day. Similarly, in Renfrew County, an under-vaccinated 8-year-old draft mare experienced acute neurological signs and tragically passed away on August 4.

A Rising Concern

These incidents mark the seventh confirmed case of EEE in Ontario horses for 2025, raising alarm bells among horse owners and health officials alike.

Understanding EEE: What You Need to Know

Eastern equine encephalomyelitis is a viral disease primarily carried by wild birds, but transmitted through mosquitoes. While horses can suffer severe consequences, they do not transmit the virus to humans or other animals. Due to its high mortality rate, EEE is recognized as one of the most dangerous mosquito-borne diseases in North America.

Preventative Measures Are Key

As we confront the reality of these outbreaks, the experts urge horse owners to remain vigilant. Simple precautions can go a long way in safeguarding against mosquito-borne illnesses. Stay informed, keep your equine friends protected, and let's work together to prevent further tragedies.