"Our data show that although it is a low-moisture food, raw flour can be a vehicle for foodborne pathogens," the study said. Other foods are more commonly associated with E. coli outbreaks, including undercooked or uncooked meat, produce such as lettuce, and unpasteurized milk and cider. In July 2016, after tests confirmed that the flour was to blame, the recall was expanded to include flour produced between November 14, 2015, and February 10, 2016. "Linking this outbreak to flour was challenging. It was later determined that those patients were baking with flour and chocolate chips.

Source: CNN November 24, 2017 17:15 UTC