Listeriosis

Listeriosis is a serious infection usually associated with eating food contaminated with the bacterium Listeria monocytogene. An estimated 1,600 people get listeriosis each year, and about 260 die. The infection is most likely to sicken pregnant women and their newborns, adults aged 65 or older, and people with weakened immune systems.


Information for providers

Find CDC guidance for caring for patients with listeriosis.

This is a Wisconsin disease surveillance category II disease:

Wisconsin case reporting and public health follow-up guidelines

Questions about Listeriosis? Contact us!

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Wisconsin Local Health Departments | Regional offices | Tribal agencies

Glossary

 
Last revised March 19, 2026