According to a press release from Wellington-Dufferin-Guelph Public Health, a dead crow found in Guelph has tested positive for West Nile Virus (WNV)
The report said there are no human cases currently in the region, however, a positive test result from a local bird suggests mosquitos in the area could be carrying WNV.
WNV was first recorded in Canada in 2002, the peak season is April-November, and it spreads through mosquito bites.
Symptoms may include fever, headache, body aches, fatigue, nausea or vomiting.
Public Health said symptoms in humans are actually rare, but in some cases WNV can result in serious illnesses such as inflammation of the brain or spinal cord.
Matthew Tenenbaum, associate medical officer of health, said for precaution’s sake residents should be taking steps in mosquito bite prevention as Public Health continues to monitor local mosquitos.
“Although the risk in our region is low, WNV is still present and people should stay vigilant,” Tenenbaum said.
The press release also provided a few tips to reduce the risk of mosquito-borne illnesses:
- Wear light-coloured long-sleeved shirts and pants when outdoors, especially at dawn and dusk
- Use Health Canada-approved mosquito repellent
- Repair window and door screens
- Drain standing water from property, this is where mosquito larvae develop
- Contact your local healthcare provider if you develop symptoms after a mosquito bite
According to Ontario Public Health, no human in the entire province has tested positive for the virus this year, as of May 24, 2026.
