Risk of Lyme disease to Canadians
Learn about the risks of getting Lyme disease and where in Canada you are most at risk.
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What is the risk to Canadians?
The risk of getting a tick bite starts when the weather warms up in the spring, through until the fall. Ticks can also be active in the winter, if the winter is mild and there is not much snow. However, the greatest risk occurs during the spring and summer months.
Blacklegged ticks are most often found in forests as well as overgrown areas between woods and open spaces. Because tick populations are spreading, it is possible to be bitten outside of these locations.
Who is most at risk?
If you work outdoors or participate in outdoor activities, you may be at a greater risk for tick bites. When engaging in the following activities, you should take precautions against tick bites:
Where in Canada are you at risk?
Blacklegged ticks are most often found in:
- southern British Columbia
- southeastern and south-central Manitoba
- southern, eastern and northwestern Ontario
- southern Quebec
- southern New Brunswick and Grand Manan Island
- parts of Nova Scotia
Lyme disease endemic and risk areas in Canada
Lyme disease endemic and risk areas in Canada – Text equivalent
Two known endemic areas are shown in New Brunswick (Milledgeville area of Saint John and North Head, Grand Manan Island). Risk areas are shown in Grand Bay/Westfield, Saint John, Rothesay, Quispamsis, St Stephen, Saint Andrews and St George.
In Nova Scotia, six known endemic areas (areas of Halifax Regional Municipality and areas of the counties of Lunenburg, Shelburne, Yarmouth, Pictou and Queens) are shown. Possible risk areas shown are locations adjacent to known endemic areas in Pictou and Lunenburg counties in Nova Scotia.
See the Surveillance page for more information on Lyme disease surveillance activities and reported human cases in Canada.
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