06/03/2026
⚠️ Heartworm is here in Ontario — and it’s closer to home than many people realize.
This blood film shows microfilaria (baby heartworms) from a heartworm-positive dog born and raised in Northumberland County. No travel history. No southern rescue. Just a local Ontario dog exposed through mosquito bites. 🩸
Heartworm disease is caused by parasites spread by mosquitoes and can lead to serious heart and lung damage in dogs. The scary part? Many infected dogs show few or no signs until the disease is advanced. 🫀
The good news: heartworm is preventable. Monthly prevention and routine testing are the best ways to protect your pets.
As mosquito season approaches, now is the perfect time to make sure your dog is up to date on their heartworm prevention and annual screening. 🦟🐶❤️