08/21/2025
🚨 Disease Alert 🚨
Eastern Equine Encephalitis (EEE) & West Nile Virus (WNV)
Within Southern Ontario, there have been 4 confirmed cases of mosquito-borne diseases in the last 30 days
Case 1: EEE - under vaccinated
Case 2: EEE - unvaccinated
Case 3: WNV - unvaccinated
Case 4: EEE - unvaccinated
EEE & WNV remain active threats to horses in our region during mosquito season. Both diseases can cause severe neurological illness and, in many cases, are fatal.
What Horse Owners Need to Know:
EEE and WNV affect the brain and nervous system.
Signs may include: fever, loss of coordination, depression, stumbling, muscle tremors, or seizures.
Prevention is Key 🛡️
✔ Vaccinate: annual vaccination against EEE and WNV is strongly recommended
✔ Mosquito Control: eliminate standing water where mosquitoes breed (buckets, troughs, tires, puddles), use fans in barns and insect-repellent sprays
Keeping your horses protected through vaccination and mosquito management is the best way to reduce their risk.
📞 Please call REVS if you’d like to book a vaccination appointment or have questions about prevention.
Follow the Ontario Animal Health Network (OAHN) for up to date disease surveillance
