Shigellosis is a bacterial infection. Approximately 300 to 400 cases are reported in Wisconsin each year. Most cases are seen in the summer and early fall and occur as single cases or outbreaks.
Shigella bacteria are found in the intestinal tract of infected people who in turn may contaminate food or water. The bacteria are spread by eating or drinking contaminated food or water or by direct or indirect contact with fecal material from an infected person.