Which of the following would be an example of potential cross-contamination?

• A. Reusing steak marinade on uncooked vegetables.
• B. Placing dairy products in a cooler with fruits while coming home from the store.
• C. Using the same cutting board for raw chicken and vegetables, but washing with warm soapy water between items.
• D. Cooking vegetables and pork chops in the same pan.

Answer: (A)

Verified step by step guidance

1. Understand the concept of cross-contamination: it occurs when harmful bacteria or allergens are transferred from one food item to another, often through direct contact or shared surfaces, leading to potential foodborne illness.
2. Identify potential sources of cross-contamination in the options provided, focusing on whether raw or contaminated items come into contact with ready-to-eat foods without proper cleaning or cooking.
3. Analyze the option 'Reusing steak marinade on uncooked vegetables' — since the marinade has been in contact with raw steak, it may contain harmful bacteria, and applying it directly to uncooked vegetables can transfer those bacteria, representing potential cross-contamination.
4. Compare this with other options: placing dairy with fruits in a cooler is generally safe as long as packaging is intact; using the same cutting board but washing it properly between uses reduces risk; cooking vegetables and pork chops together in the same pan is safe if both are cooked thoroughly.
5. Conclude that the key factor in potential cross-contamination is the direct transfer of bacteria from raw meat to ready-to-eat foods without adequate cleaning or cooking, as exemplified by reusing steak marinade on uncooked vegetables.