Food Safety Report: Wendy's, 4047 4th St N, St. Petersburg, FL, USA 2 years ago • details 36 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Fever, Stomach Pain, Cramps, Chills, Headache Suspected source: Lettuce on chicken sandwich Onset: 4 to 12 hours Duration: Several days