A sign warning hikers of the presence of ticks in a forest in the Eastern Townships, on Wednesday 16 October 2024. THE CANADIAN PRESS/Graham Hughes
By The Canadian Press
May 21, 2026 | 9:10 AM
MONTREAL — Montreal public health is warning of an uptick in Lyme disease in the city after officials recorded 161 cases in 2025.
That’s the highest number of cases since 2003, when Lyme infections because a notifiable disease in Quebec.
The tick-born disease is on the rise across the province, with 869 cases reported between Jan. 1 and Nov. 5, 2025.
The Quebec government says the rise in tick-related infections could be explained by climate change, as warmer weather would allow ticks to survive more easily.