Food Safety Report: Salad, Walmart Supercenter, 13003 Tomball Parkway, Houston, TX, USA 1 year ago • details 14 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Fever, Stomach Pain, Cramps, Chills Suspected source: Salad Onset: 12 to 24 hours Duration: 4 to 12 hours Sick: Me Additional information: Marketwire salad mix.