Food Safety Report: Knott's Berry Farm, Beach Boulevard, Buena Park, CA, USA 1 month ago • details 70 Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Stomach Pain, Cramps, Chills, Headache Suspected source: Hamburger at knotts Onset: 12 to 24 hours Duration: 12 to 24 hours Sick: Me