The CDC has counted 345 confirmed infections in 27 states, including 36 hospitalizations and no deaths. Whole-genome sequencing suggested the cases were coming from the same source, and restaurant histories pointed investigators in the same direction. Of 191 people interviewed, 177 - 93 percent - said they had eaten at a Mexican-style restaurant in the month ending July 14. The restaurant chains, for their part, moved before the investigation became a national story. Once customers start worrying about contaminated produce, distinctions between one ingredient, one supplier and one restaurant brand tend to disappear quickly.