What are Mosquitoes?
Mosquitoes are small insects belonging to the fly family. Mosquitoes usually lay 100-400 eggs at a time in still water. The female mosquito is the one that bites, as she needs blood to make her eggs. A mosquito bite usually results in a reaction including swelling, redness, and itchiness, and can vary from mild to severe. Although mosquitoes can bite at any time of day, they are most active between dusk and dawn (Government of Canada, 2016).
What are the health risks?
There are many health risks related to mosquito bites. There are no vaccines for many of the diseases that mosquitos can spread, so it is important to protect yourself. See below for some of the diseases transmitted by mosquitoes.
Protect Yourself and Your Family!
|Areas:||North America, Africa, Europe, Middle East, Australia, India|
|Areas:||U.S., Caribbean, South and Central America, Mexico, South Pacific and Oceania region, South East Asia, West Africa|
|Areas:||Africa, Asia, Caribbean, Eastern Europe, South and Central America, Middle East, South Pacific and Oceania Region|
|Symptoms:||Fever, severe headache, pain behind the eyes, joint and muscle pain, rash|
|Areas:||Tropic and subtropic regions: Africa, Central and South America, the Caribbean, the Eastern Mediterranean, South and Southeast Asia, Oceania|
|Symptoms:||Sudden high fever, rash, nausea, vomiting, headache|
|Areas:||Africa, Asia, Mexico, Caribbean, South and Central America, Pacific Islands, Southeastern U.S.|
How can I minimize my risk?
- Limit outdoor activities, especially between dusk and dawn from May to September. (But remember, mosquitoes can bite at any time of day, so always protect yourself).
- Wear loose, light-coloured long sleeved shirts and pants with tight woven material.
- Check and fix house screens on windows and doors to keep mosquitoes outside.
- When vacationing, stay in well-screened, air-conditioned buildings, and sleep with a treated mosquito net.
- Before traveling to high- risk areas, stop by a travel health clinic and visit the Public Health Agency of Canada’s website for Travel Health Notices.
- Use repellent:
- Safe when used in correct concentrations, depending on the user’s age. (Government of Canada, 2016)
- 6 months to 2 years: up to 10%, don’t apply more than once a day.
- 2 to 12 years: up to 10%, can reapply up to three times daily.
- 12+ years: up to 30%.
Less than 6 months: don’t use DEET products (use a mosquito net).
Less than 12 years: don’t use DEET daily for more than a month.
- Should not be used on children younger than 6 months old.
- Do not use directly on skin, ONLY for use on clothing and netting. Although not available in Canada, travel health clinics can provide you with information on how to purchase some before travelling.
What do I do if I have been bitten?
Most mosquito bites heal by themselves in a few days. The most common concern is controlling the itch, especially since scratching can cause infection. Ways to reduce the itch are:
- Cool compress.
- Topical creams like calamine lotion, non-prescription hydrocortisone cream.
- Oral non-prescription antihistamine (Talk to your health care provider or pharmacist before taking or using any medications).
If any concerning symptoms appear after being bitten, or travelling (e.g., fever, rash, headaches, red eyes), contact your health care provider immediately.
How can the mosquito population be controlled?
Natural predators like fish, frogs, and birds, eat mosquitoes and help to keep them under control. Pest control agencies can also spray small areas with pesticides (called fogging) to help reduce the number of mosquitoes.
To reduce the mosquitoes around your home:
- Remove standing water around your home (e.g., bird baths, flower pots, eaves troughs/gutters).
- Keep pools clean and chlorinated, and aerate ornamental ponds.
- For water that cannot be emptied or changed (e.g., ponds), use an approved mosquito larvicide (look for a Pest Control Product (PCP) number) that either kills larvae or stops development.
- Keep grass cut.
For more information
To speak with a Public Health Inspector call 519-258-2146 ext. 4475.
Visit canada.ca and search ‘Mosquitoes’
Other Helpful Resources:
- Centers for Disease Control and Prevention - Search ‘Mosquito Bite’
- Government of Canada - Search ‘Mosquitoes’ ‘Chikungunya’, ‘Malaria’, ‘West Nile Virus’, ‘Zika Virus’
- Public Health Agency of Canada - Search ‘Dengue Fever’, ‘Travel Health’
Government of Canada. (2016). Insect bite prevention. Retrieved from https://travel.gc.ca/travelling/health-safety/insectbite?_ga=1.37649506.359620601.1474981096
Government of Canada. (2016). Insect repellents. Retrieved from https://www.canada.ca/en/health-canada/services/about-pesticides/insect-repellents.html
Government of Canada. (2016). Mosquitoes. Retrieved from https://www.canada.ca/en/health-canada/services/pest-control-tips/mosquitoes.html?_ga=1.77615508.1239796162.1476980648