http://www.dreamstime.com/stock-images-carnival-rides-games-fair-image25309294The North Dakota Department of Health is investigating a possible cluster of Shiga toxin-producing E. coli (STEC) infections in eastern North Dakota. Three cases have been reported, all of whom are younger than 18 years of age, and all of whom reported attending the Red River Valley Fair in West Fargo, ND, which was held…