Food Safety Report: Culver’s, Washington Street, Pella, IA, USA 1 year ago • details 10 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Fever, Stomach Pain, Cramps, Chills, Headache Suspected source: Culvers Onset: 12 to 24 hours Duration: 4 to 12 hours Sick: 2 people