Legionella

Legionnaires’ disease

Published
December 07, 2024
Last updated
May 24, 2024

About Legionella

Legionnaires’ disease is a serious type of pneumonia (lung infection) caused by Legionella bacteria. Outbreaks are commonly associated with buildings or structures that have complex water systems, including healthcare facilities like nursing homes and hospitals.

Resources, Guides, Reports, & Toolkits

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Public Health Considerations for Healthcare-associated Cases and Outbreaks of Legionnaires’ disease

By CDC

This website provides guidance for responding to healthcare-associated cases and outbreaks of Legionnaires’ disease, including: an outline of investigation steps; information on case finding, environmental assessment, and immediate control measures; and communications resources.

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CSTE Legionnaires’ Disease Resources

By CTSE

This website provides links to a risk communication toolkit and water management program (WMP) evaluation tool that can be used when responding to healthcare-associated Legionnaire's disease

New Updated

Example of patient notification: Legionella outbreak in a general medicine ward


See page 32, Box 8.3 for this example

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Water-Associated Organisms


This page offers a collection of resources to assist with water-related outbreak detection and response, including items relevant to Legionnaire's Disease (e.g., CMS WMP Memo)

Legionella Outbreak Reports & News