Food Safety Report: Publix Super Market at Islamorada, Overseas Highway, Islamorada, Florida, USA 2 years ago • details 9 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Stomach Pain, Cramps Suspected source: Salad Onset: Less than 4 hours Duration: 4 to 12 hours Additional information: From Fresh Express Southwest Salad from here