Food Safety Report: Culver’s, Madison Avenue, Mankato, MN, USA 1 year ago • details Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Stomach Pain, Chills, Headache Suspected source: Better butter burger Onset: Less than 4 hours Duration: 4 to 12 hours Sick: Me Additional information: Wife had a burger not sick