Lyme Disease Statistics

Please note that Canadian Lyme disease statistics tend to be a few years out of date. Only Ontario reports Lyme disease cases within a few months of being recorded. It is also helpful to be aware that the case definition for Lyme disease changed in 2016, so any abrupt jumps seen in statistics for that year don't necessarily mean it was a bad year for Lyme infections in a province. It may just mean that more cases fit the revised definition.
Updated: June 7, 2022

National

2021 is the most current year for which statistics are available.

  • 2,851 cases diagnosed nationally.
  • Between 2009 and 2021, 14,616 human cases of Lyme have been recorded in Canada.
  • Total number of annual Lyme cases dipped in 2020 but rebounded in 2021 to reach the highest number ever recorded for a single year.


British Columbia

2019 is the most current year for which statistics are available.

  • 16 cases reported.
  • 50% of cases involved European strains.
  • 25% of cases were contracted within the province.


Alberta

2020 is the most current year for which statistics are available.

  • 4 cases reported.
  • 15% of blacklegged ticks collected in AB were infected with Lyme bacteria.
  • Lyme disease rates were significantly lower than the previous year.



Saskatchewan

2021 is the most current year for which statistics are available.

  • 2 cases recorded.
  • Both cases were travel related.


Manitoba

2021 is the most current year for which statistics are available.

  • 40 cases reported.
  • There were 12 confirmed cases and 18 probable cases.
  • 2020 and 2021 rates were significantly lower than the five year average.


Ontario

2021 is the most current year for which statistics are available.

  • 1,597 cases of Lyme disease were diagnosed in 2021.
  • 2021 case counts were well above the 5 year average.


Quebec

2021 is the most current year for which statistics are available.

  • 709 cases were reported.
  • 92% of Lyme infections were acquired within the province.
  • 2021 annual case totals were the highest ever recorded.


Newfoundland & Labrabor

2021 is the most current year for which statistics are available.

  • 10 cases have been recorded since 1991.
  • No cases of Lyme have been acquired within the province.


Nova Scotia

2019 is the most current year for which statistics are available.

  • 830 confirmed or probable cases.
  • Most cases were recorded in the 40-59 and 60+ age groups
  • Nova Scotia's Lyme disease rate is more than 10 times the national rate.


New Brunswick

2018 is the most current year for which statistics are available.

  • 20 confirmed cases were reported.
  • 90% of cases were locally acquired.
  • Lyme rates have been trending upwards over the past seven years.


Prince Edward Island

2021 is the most current year for which statistics are available.

  • Only one locally acquired case has ever been recorded (in 2012).
  • On average there are 0-4 cases of Lyme reported each year.