In June, Wellesley, MA, was ripe with rumors that one of its supermarkets was the source of three E. coli infections in the community. Wellesley Health Department sources don’t have much to say about the investigation into those three cases except to say it had nothing to do with any local market. The local health department heard about the first Wellesley resident to become infected with E. coli from the Massachusetts Department of Public Health’s surveillance system on June 12. Wellesley’s investigation then turned up two additional E. coli cases. All three Wellesley E. coli cases involved adults. Children, the elderly and others with compromised immune systems are most at risk from E. coli infection. Health department sources were not able to say whether the investigation remains open or whether the pathogen’s source was determined, but they were definite about no local supermarket being involved.