Food Safety Report: Culver's, East 2nd Street, Superior, WI, USA 1 year ago • details 1 Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Fever, Stomach Pain, Cramps, Chills, Headache, other: Hot flashes Suspected source: Salad Onset: 4 to 12 hours Duration: 12 to 24 hours Sick: 2 people