Health officials are urging people to contact their health care provider if they ate a hamburger, especially if undercooked, at a table-service restaurant in Minnesota since Oct. 31 and then developed diarrhea, particularly bloody diarrhea, in the following week. The Minnesota Department of Health has identified 10 cases of E.

coli O157 infection in people who ate burgers at multiple locations of Red Cow, a table-service restaurant chain with locations in Hennepin, Ramsey and Olmsted counties. One additional patient reported dining at Hen House Eatery in Minneapolis, which received the same ground beef product suspected in this investigation. The ground beef product was also distributed to other establishments, so additional patients from other locations could be identified.

So far, patients have reported meal dates of Oct. 31 through Nov. 7, and illness onset dates range from Nov.

4 through Nov. 9. Patients range in age from 9 to 70 years.

Two patients have been hospitalized. Additional potential cases are under investigation. Red Cow and Hen House Eatery owners are fully cooperating with the investigation and have made multiple changes, including product changes, to prevent further illnesses.

The health department is working with the Minnesota Department of Agriculture and multiple local environmental health agencies during this ongoing investigation. About E. coli infections Anyone who has developed symptoms of E.

coli infection should seek medical attention and tell their.