State health officials are urging anyone who ate a hamburger at a restaurant since Halloween and who has developed diarrhea, particularly bloody diarrhea, to contact a medical provider to check for E. coli infection.

Eight recent cases of E. coli in Minnesota have been linked to burgers eaten at restaurants in Hennepin, Ramsey and Olmsted counties.

The Minnesota Department of Health (MDH) says it has identified 10 cases of E. coli O157 infection in people who had eaten burgers at multiple locations of Red Cow, a table-service restaurant chain. One additional case reported dining at Hen House Eatery in Minneapolis,

So far, the Minnesota Department of Health has identified 11 illnesses: 10 across multiple locations of Red Cow and another traced to Hen House Eatery in Minneapolis.

The Minnesota Dept. of Health wants anyone with gastrointestinal illness after eating a hamburger at a restaurant recently to contact their health provider.