Food Safety Report: Walmart Supercenter, 4166 Jimmy Lee Smith Parkway, Hiram, GA, USA 1 year ago • details 12 Suspected food poisoning. Symptoms: Diarrhea, Stomach Pain Suspected source: Romaine lettuce Onset: 4 to 12 hours Duration: 12 to 24 hours Sick: Me Additional information: Pre-packaged salad from deli