Food Safety Report: Culver’s, Venture Drive, Ottumwa, IA, USA 8 months ago • details 9 Suspected food poisoning. Symptoms: Diarrhea, Nausea, Stomach Pain, Cramps, Chills, Headache Suspected source: Broccoli Onset: 4 to 12 hours Duration: 4 to 12 hours Sick: Me