DANGEROUS MOSQUITOES
West Nile Virus Detected in Ottawa Mosquitoes: A Small Bite That Deserves Our Attention
Ottawa Public Health has confirmed the first positive mosquito tests for West Nile virus this season. While the risk remains relatively low, health officials are reminding residents that even an ordinary mosquito bite can sometimes carry unexpected dangers.
The infected mosquitoes were discovered through routine monitoring conducted during the summer. As of August 3, no human infections had been reported in Ottawa, while Ontario had recorded one confirmed case. On August 12, Ottawa Public Health officially alerted local physicians to the detection of the virus in mosquito traps.
I have always considered mosquitoes one of the less pleasant parts of our beautiful Canadian summers. Whether enjoying a barbecue in the backyard, walking along the Ottawa River or relaxing near a cottage lake, those irritating little insects somehow manage to find us. Usually, we complain, scratch our bites and forget about them. But West Nile virus reminds us that mosquitoes are more than just a nuisance.
How Can Mosquitoes Spread Viruses?
Mosquitoes do not normally spread West Nile virus directly from one person to another. The virus circulates primarily between birds and mosquitoes. When a mosquito bites an infected bird, it may acquire the virus and later transmit it to a human through another bite.
Other mosquito-borne viruses, including dengue and Zika, can follow a different cycle in which mosquitoes transmit infections between people. Fortunately, approximately 70–80% of people infected with West Nile virus develop no symptoms. Others may experience fever, headaches, fatigue or muscle pain. Severe complications are uncommon but can be particularly dangerous for older adults and people with weakened immune systems.
Why Do Mosquito Bites Itch?
When a female mosquito bites us, she introduces saliva containing substances that help her feed. Our immune system reacts by releasing histamine, causing redness, swelling and that maddening itch. Scratching may feel wonderful for a few seconds, but it irritates the skin further and can introduce bacteria. A better solution is to wash the bite with soap and water, apply a cold compress for approximately ten minutes, or use an appropriate anti-itch cream.
Simple Ways to Protect Yourself
Ottawa residents can reduce their exposure by wearing light-coloured, long-sleeved clothing, using approved repellents containing DEET or icaridin, and ensuring window screens are intact.
Equally important is eliminating standing water from flowerpots, buckets, gutters and birdbaths. Even small collections of water can become mosquito breeding grounds.
The risk continues until the first hard frost.
Personally, I certainly do not intend to stop enjoying Ottawa's wonderful summer evenings. But keeping mosquito repellent nearby and checking the backyard for standing water seems a small price to pay for peace of mind.
After all, sometimes protecting our health begins with the simplest habits.
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