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Wisconsin Department of Health Services

Communicable  Diseases Subjects A-Z



Sexually Transmitted Diseases


Disease Reporting



Giardiasis is an intestinal illness caused by a microscopic parasite called Giardia lamblia. It is a very commonly reported cause of diarrheal illness in Wisconsin with an average of 1200-1300 cases reported in Wisconsin each year. Cases may occur sporadically or in outbreaks.

General information

Giardia fact sheet  - Spanish - Hmong Information for health professionals

Wisconsin case reporting and public health follow-up guidelines: Giardia EpiNet
Guidelines for Prevention and Control for Local Public Health Agencies Giardia Manual


Wisconsin Local Health Departments - Regional offices - Tribal agencies

Last Revised: March 04, 2014