Food Safety Report: Costco Wholesale, West Avenue L, Lancaster, CA, USA 3 years ago • details 21 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Stomach Pain, Cramps, Chills, Headache, other: Other Suspected source: Mac and cheese Onset: 1 day Duration: 4 days Sick: 14