Chapter 13: How Safe Is Our Food Supply? Critical Thinking 1. For each of the foods given below: a) Indicate whether it is likely to be a cause of microbial food-borne illness. b) Describe a scenario in which the food could become contaminated. c) What could you do to avoid contamination and/or food poisoning in each case? Fruit salad Home-canned green beans Deviled eggs Stir-fried chicken with vegetables Potato salad served at a summer picnic Raw seafood Unpasteurized cheese 2. A train crash spills a load of PCBs in a river that feeds into a local reservoir. a) How would this water contamination affect the safety of the drinking water? b) The milk from dairy cattle grazing nearby? c) The fish that swim in the river? d) The crops irrigated by this water?