Waterloo Region —  A mosquito surveillance trap in Kitchener has tested positive for West Nile virus. This is the first positive mosquito trap in Waterloo Region in 2026. There have been no reported human cases of West Nile virus to date this year.

"A positive mosquito trap test confirms that there is West Nile virus in the region," says Dr. Megan Davis, Medical Resident with Region of Waterloo Public Health. "Protecting yourself against mosquito bites is the most effective way to avoid West Nile virus infection. You can also help reduce the mosquito population by removing still or standing water on your property, as that is where mosquitoes breed.” 

Throughout the warmer months, Public Health conducts case investigations, mosquito testing, and larviciding to control the mosquito population and to protect residents’ health. 

Most people do not experience any symptoms when infected with West Nile virus. For those who do, symptoms occur three to 15 days after exposure. Symptoms may include mild fever, headache, muscle aches, stiff neck, swollen glands and skin rash. In rare cases, more severe symptoms can develop. If you are experiencing these symptoms, you should seek medical attention. 

Protect yourself from West Nile virus:

• Use screens on your windows
• Wear light-coloured clothing
• Wear long sleeves, pants and a hat
• Wear socks and closed-toe shoes
• Use insect repellent with DEET or Icaridin according to manufacturer recommendations
• When possible, avoid being outside at dusk and dawn when mosquitoes are most active
• Reduce mosquito breeding grounds by removing standing water on your property
• Do not handle dead or sick birds

For more information about West Nile virus, mosquito prevention and what to do when you encounter a dead bird, visit regionofwaterloo.ca/WestNileVirus. 

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