First West Nile‑positive mosquito batch detected in Ajax, Durham Region

Durham Region Health Department confirmed that a batch of adult mosquitoes collected from a trap site in Ajax has tested positive for West Nile virus, marking the first positive batch of the season in the region. The department conducts weekly mosquito trapping from June to September and sends samples for laboratory testing.

West Nile virus is transmitted to humans through the bite of an infected mosquito that has fed on an infected bird. The disease does not spread person‑to‑person. While most infections cause mild symptoms such as fever, headache, body aches, nausea, vomiting and a rash, more serious cases can involve muscle weakness, stiff neck, confusion, tremors, numbness or light sensitivity. The health department notes that the risk of infection is low but advises residents to wear long clothing, use DEET‑ or icaridin‑based repellents, eliminate standing water, and keep window and door screens in good repair.

For additional information, residents can contact the Durham Health Connection Line.