Food Safety Report: In-N-Out Burger, Placerville Road, Folsom, CA, USA 2 years ago • details 58 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Fever, Stomach Pain, Cramps, Chills, Headache Suspected source: Lettuce Onset: Less than 4 hours Duration: 12 to 24 hours Sick: 2 people