Save Share Print
Home
Diseases & Conditions
Index Infectious Diseases Respiratory Diseases Legionellosis
Legionellosis (Legionella, Legionnaires Disease) Epidemiological Summaries

Legionellosis (Legionella, Legionnaires Disease) Epidemiological Summaries

These surveillance reports describe the epidemiology of legionellosis in Ontario. Seasonal and annual incidence data are presented, including by: sex, age group, geography, outbreak status, test percent positivity and hospitalizations and deaths.

Current Report

Surveillance Report

Epidemiological summary of legionellosis activity in Ontario displaying trends over time, by sex and age group, and by public health unit; number of patients tested and percent positivity; and severity indicators.

1 MB
Updated 22 May 2026

Historical Reports

Surveillance Report

Summarizes the epidemiology of laboratory-confirmed legionellosis cases in Ontario in 2025 and compares findings to recent years.

1.1 MB
Updated 28 May 2026

Surveillance Report

Epidemiological summary of legionellosis activity in Ontario, with a focus on 2024, displaying trends over time, by sex and age group, and by public health unit; number of patients tested and percent positivity; and severity indicators.
1.4 MB
Updated 16 May 2025

Surveillance Report

Epidemiological summary of legionellosis activity in Ontario, with a focus on 2023, displaying trends over time, by sex and age group, and by public health unit; number of patients tested and percent positivity; and severity indicators.

1.1 MB
Updated 20 Nov 2023

Related Information

Published 28 May 2026
Save Share Print

Register for MyPHO to save commonly accessed resources, select areas of interest to help us recommend content most relevant to you, access online learning, and subscribe to our mailings.
Register for MyPHO
© 2026 Ontario Agency for Health Protection and Promotion Accessibility Privacy Terms of Use FAQs Sitemap