One pool of mosquitoes tests positive for West Nile virus

Waterloo Region – One pool of mosquitoes has tested positive for West Nile virus in the city of Waterloo. This is the first positive pool of mosquitoes in the region in 2024. There have been no reported human cases of West Nile virus in Waterloo Region to date in 2024.

“Although the positive pool of mosquitoes was found in Waterloo, this an indicator that West Nile virus is present in our region,” says Associate Medical Officer of Health, Dr. Rabia Bana. “It is important for people to take precautions against mosquito bites when they are enjoying the outdoors, and to help control the mosquito population by removing standing water on their properties.” 

Most people do not experience any symptoms when infected with West Nile virus. For those who do, symptoms occur three to 15 days following an infected mosquito bite. 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 mosquitoes

• 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
• Avoid being outside at dusk and dawn when mosquitos are most active

Eliminate mosquito breeding grounds

• Don’t allow outdoor objects to collect water
• Cover rain barrels with a fine mesh screen
• Change the water in birdbaths at least once a week
• Keep pool covers drained of standing water
• Don’t allow water to collect in roadside ditches or in low-lying areas on your property
• Clean up brush and debris that could act as mosquito breeding areas
• Aerate ornamental ponds and fountains so that water does not sit still

For more information about West Nile virus visit regionofwaterloo.ca/FightTheBite.

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