Food Safety Report: Sainsbury's, Glen Road, Oadby, Leicester, UK 1 year ago • details 96 Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Fever, Stomach Pain, Cramps, Chills Suspected source: prawn and mayo sandwich Onset: 4 to 12 hours Duration: 12 to 24 hours