Students who attended a Youth & Government conference at the downtown Raleigh Convention Center abruptly fell ill on February 13, 2010. A total of about 1000 students were registered for the four day event. Investigators found that students who ate chicken at the February 12 banquet held at the Convention Center were more likely to become ill. Illness symptoms included: stomach discomfort; vomiting; and diarrhea. The ill were isolated, treated, and returned to conference activities. Initially norovirus was suspected as the cause of the outbreak, however the epidemologic findings did not support this conclusion. Investigators later confirmed Clostridium perfringens as the cause when Clostridium perfringens enterotoxin was detected in stools of eight ill persons.