Food Safety Report: H-E-B, Sidney Baker Street South, Kerrville, TX, USA 2 years ago • details 5 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Stomach Pain, Cramps, Chills, Headache Suspected source: Clam chowder Onset: Right away Duration: 4 to 12 hours Sick: Me Additional information: It was Campbells Clam Chowder