In September 2011, Minnesota Department of Health (MDH) and City of St. Paul staff investigated an outbreak of suspected bacterial intoxications associated with a restaurant in St. Paul. Three people of 15 people interviewed met the case definition. The median incubation period for the cases was 4 hours (range, 3 to 4.5 hours). The median duraition of illness was 7 hours (range, 6 to 8 hours). All three cases reported diarrhea and vomiting.

While no food items were statistically associated with illness, all three cases reported consuming spring rolls. The three cases reported dining at the same time, whereas, the non-ll controls who reported consuming spring rolls dined at the restaurant several hours later. City of St. Paul sanitarians conducted a food preparation review of the spring rolls. No violations were identified.

The etiology was not determined but the illnesses were consistent with bacterial intoxication caused by either Staphylococus aureus or the emetic form of Bacillus cereus.