SIMCOE MUSKOKA – The Simcoe Muskoka District Health Unit (SMDHU) is reminding residents to protect themselves against mosquito bites after mosquitoes collected in Barrie tested positive for West Nile virus. The virus was also recently detected in a bird and a horse in Simcoe Muskoka. Currently, no human cases have been confirmed in Simcoe Muskoka in 2026. However, the positive results are a timely reminder to take precautions against West Nile virus.

West Nile virus circulates between birds and mosquitoes. People can be infected by a mosquito that has fed on an infected bird. The risk is highest in late summer. The health unit recommends these steps to prevent mosquito bites:

• Use an insect repellent approved for use in Canada and follow the label instructions.

• Wear light-coloured clothing and cover exposed skin with long sleeves, long pants, socks and a hat when mosquitoes are present.

• Remove standing water around your home to reduce mosquito breeding.
• Make sure window and door screens are in good condition to keep mosquitoes out.

Most people infected with West Nile virus do not get sick, but some can become seriously ill. Symptoms can include fever, muscle weakness, a stiff neck, confusion, a severe headache and sensitivity to light. In rare cases, the virus can lead to serious neurological illness. Anyone with symptoms should seek medical care.

The health unit monitors mosquitoes through trapping, testing and larval checks across Simcoe Muskoka during the summer.

For more information about West Nile virus, visit smdhu.org/WNv.