How Risky Is a Mosquito Bite in Canada? What to Know About West Nile Virus This Summer
As summer arrives in Canada, so do mosquitoes, bringing with them the risk of West Nile virus. Dr. Gerald Evans, Chair of Infectious Diseases at Queen's University, shares essential information on how Canadians can protect themselves from this potentially serious illness.
West Nile virus is transmitted through the bite of an infected mosquito. While most people infected do not develop symptoms, about 20% may experience fever, headache, body aches, joint pains, vomiting, diarrhea, or rash. In rare cases, severe neurological illness can occur, including encephalitis or meningitis.
How to Reduce Your Risk
Dr. Evans recommends several preventive measures:
- Use insect repellent containing DEET, icaridin, or oil of lemon eucalyptus.
- Wear protective clothing such as long sleeves and pants, especially during dawn and dusk when mosquitoes are most active.
- Eliminate standing water around your home, as it serves as breeding grounds for mosquitoes.
- Install or repair screens on windows and doors to keep mosquitoes out.
While the risk of contracting West Nile virus in Canada is generally low, it varies by region and season. Warmer temperatures and increased rainfall can lead to higher mosquito populations and greater transmission risk.
Symptoms and When to Seek Help
If you develop symptoms such as severe headache, high fever, neck stiffness, disorientation, tremors, or muscle weakness after a mosquito bite, seek medical attention immediately. Older adults and those with weakened immune systems are at higher risk for severe illness.
Dr. Evans emphasizes that awareness and simple precautions can significantly reduce the risk. Enjoy the summer outdoors, but stay protected.
