Cross-Contamination Prevention Flashcards

What is the best way to prevent cross-contamination when thawing raw meat in a refrigerator?

Answer: Place raw meat in a sealed container or on a tray on the lowest shelf

Sealed containers or trays on the lowest shelf catch drips and prevent raw meat juices from contaminating other foods.

A cook uses their bare hands to form raw hamburger patties and then immediately slices tomatoes. What is the primary risk?

Answer: Transferring E. coli from the raw beef to the ready-to-eat tomatoes

Raw ground beef commonly contains E. coli O157:H7 — touching ready-to-eat foods with unwashed hands after handling raw beef is a serious contamination risk.

What does 'sanitize' mean in the context of preventing cross-contamination?

Answer: Reducing pathogens on a surface to safe levels using chemicals or heat after cleaning

Sanitizing uses approved chemicals or heat to reduce microbial levels on a surface — it must happen after cleaning to be effective.

Why is it dangerous to store cleaning chemicals above or near food storage areas?

Answer: Chemicals can spill or leak onto food, causing chemical contamination and potentially serious illness

Storing chemicals above food creates a risk of chemical spills dripping onto food, which can cause chemical poisoning or death.

Which scenario represents indirect cross-contamination?

Answer: A worker touches raw chicken, wipes their hands on an apron, then handles a bread roll

Indirect contamination passes through an intermediate carrier (the apron) rather than direct contact between the contaminated and clean food.

What should food handlers do to prevent cross-contamination when preparing food for a customer with a known food allergy?

Answer: Use clean utensils and a freshly sanitized surface, and avoid cooking near allergen-containing foods

Allergens cannot be destroyed by cooking — preventing cross-contact requires dedicated clean equipment and separation from allergen sources.