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Wisconsin Department of Health Services

Communicable  Diseases Subjects A-Z



Sexually Transmitted Diseases


Disease Reporting


(Legionnaires' disease, Pontiac fever)

Legionellosis is an infection caused by Legionella bacteria. The severity of the illness can be mild or 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.

General information

Legionellosis fact sheet - Hmong - Spanish

Information 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 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 EpiNet
Legionellosis case report form


Wisconsin Local Health Departments - Regional offices - Tribal agencies

Last Revised: March 04, 2014