Food Safety Report: Campbell's Chunky Manhattan Clam Chowder, Safeway, Siskiyou Boulevard, Ashland, OR, USA 2 years ago • details 5 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting Suspected source: Campbells hungry man Manhattan clam chowder Onset: 4 to 12 hours Duration: 4 to 12 hours Additional information: Ate before bed woke up sick