Public health officials in Illinois are warning about possible dangers from contaminated raw milk distributed from an Indiana dairy.

An outbreak of bacterial illness in southern Michigan has been linked with drinking raw milk from the same Middlebury, Indiana dairy. A farm cooperative in Michigan received milk from that dairy and delivered it to locations in Chicago, Des Plaines, Downers Grove and Elgin.

The culprit is Campylobacter (kamp-ih-low-BAK'-tor) bacteria. It can cause digestive symptoms including diarrhea and abdominal pain. And it's been confirmed in 11 of 18 cases reported in Michigan.

People with those symptoms who have had raw milk should seek testing and treatment from their doctors. They also should report the illness to their local health department.

Copyright 2010 The Associated Press.