Food Safety Report: Granola Cereal from Quaker Oats, Costco Wholesale, Venture Drive, Duluth, Gwinnett County, GA, USA 2 years ago • details 53 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Stomach Pain Suspected source: possibly granola cereal from quaker oats Onset: 1 to 2 days Duration: 12 to 24 hours Sick: A loved one Additional… See more