Which practice would most directly minimize post-pasteurization contamination?

• A. Using sealed containers and sterile packaging materials.
• B. Opening containers during handling.
• C. Storing milk at room temperature.
• D. Using non-sterile filling equipment.

Answer: (A)

After pasteurization, the product is not automatically sterile. Contamination can be introduced during handling, filling, and packaging. Using sealed containers and sterile packaging materials creates a barrier that prevents microbes from entering the product after it has been heat treated, which is the most direct way to minimize post-pasteurization contamination.

Opening containers during handling, storing at room temperature, and using non-sterile filling equipment all introduce opportunities for microbes to enter the product or to grow if they’re already present, undermining the safety gains from pasteurization.