Question

which of the following is not a potential cause of bacterial contamination during food processing?
puncturing the digestive tract of a carcass
lymph nodes being present in a ground product
sanitizing knives
dirty processing equipment

Explanation:

Sanitizing knives is a practice to reduce bacterial contamination, not a cause. Puncturing the digestive tract can release bacteria, lymph nodes may carry bacteria, and dirty equipment can harbor bacteria.

Answer:

Sanitizing knives