Public health authorities are urging residents of the Laurentians to remain vigilant against mosquito bites following the detection of West Nile virus (WNV) in mosquito samples collected in Rosemère at the end of August.
The Town of Rosemère confirmed that laboratory analyses carried out by an environmental consulting firm revealed the presence of the virus. Results were immediately communicated to Quebec’s Ministry of Health and Social Services (MSSS). Although WNV has been present in Quebec for many years, particularly in southern regions, its seasonal appearance is once again a reminder of the importance of prevention.
Risk of Infection Remains Low, but Seniors Most Vulnerable
The Direction de santé publique du Centre intégré de santé et de services sociaux (CISSS) des Laurentides stressed that while the overall risk of contracting WNV or developing severe illness remains very low, certain groups are more vulnerable.
People aged 50 and older, those with chronic illnesses such as diabetes or cardiovascular disease, and individuals with weakened immune systems face higher risks of serious complications. These can include meningitis (infection of the lining of the brain) or encephalitis (inflammation of the brain) if bitten by an infected mosquito
Local Mosquito Control Efforts
Rosemère runs an annual biological mosquito control program using specialized contractors. This initiative helps limit mosquito proliferation in the community, but officials emphasize that residents also play an essential role in reducing breeding grounds and protecting themselves
Preventive Measures for Residents
Authorities recommend several simple yet effective measures to reduce exposure to mosquito bites:
- Apply insect repellent containing DEET or icaridin to exposed skin, following manufacturer instructions.
- Wear light-coloured clothing that covers arms and legs, especially at dawn and dusk.
- Use mosquito screens on doors, windows, and tents.
- Cover strollers and playpens with mosquito netting.
- Avoid handling sick or dead wild birds, which can carry WNV.
In addition, eliminating stagnant water remains a crucial step to preventing mosquito breeding. Buckets, flowerpots, clogged gutters, garden furniture, tires, and children’s toys should be checked regularly and emptied of standing water.
Staying Informed
Residents with health concerns related to mosquito bites can call Quebec’s Info-Santé line at 811 (option 1). More information on WNV prevention and safe repellent use is available on the Quebec government’s website at quebec.ca.
Public health officials stress that community cooperation is essential. “The best way to prevent infection is to protect yourself from mosquito bites and reduce their numbers in your environment,” the CISSS des Laurentides noted in its advisory.
