In Cleveland, Ohio, one hundred fifty six persons became ill after eating corned beef that had been purchased from one delicatessen. Symptoms included abdominal cramps and vomiting. No one required hospitalization. The corned beef had been held at inappropriate temperatures allowing Clostridium perfringens to flourish. Clostridium perfringens was isolated from remaining samples of corned beef. Eighty six persons became ill after attending a traditional St. Patrick's Day dinner (location not given). One person required hospitalization. Stool samples confirmed that the illnesses were caused by Clostridium perfringens. Clostridium perfringens was also found in a leftover sample of corned beef.