Legionellosis

(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.

Information on this page has been organized into two categories. Please choose one of the following.

Additional Info Group

General Information

Legionellosis fact sheet P-42066 (PDF, 16 KB) - Hmong P-42066h (PDF, 16 KB) - Spanish P-42066s (PDF, 47 KB)

For Health Professionals

This is a Wisconsin disease surveillance category II disease:
Report to the patient's local public health department electronically, through the Wisconsin Electronic Disease Surveillance System (WEDSS), by mail or fax using an Acute and Communicable Disease case report F-44151 (Word, 166 KB) or by other means within 72 hours upon recognition of a case.
Information on communicable disease reporting

Wisconsin case reporting and public health follow-up guidelines: Legionellosis (PDF, 23 KB) EpiNet
Legionellosis case report form (PDF, 40 KB)

Last Revised: December 17, 2015