(Legionnaires' disease, Pontiac fever)

Legionellosis is an infection caused by Legionella bacteria. The illness can be mild or can result in pneumonia. Most cases occur as single, isolated events; however, outbreaks have been noted.

There are two distinct forms of the disease: Legionnaires' disease and Pontiac fever.

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Additional Info Group

Last Revised: August 30, 2018