California Food Handler Exam Prep 2025 – Complete Practice Test

Cross-contamination occurs when one food or surface transfers microorganisms, such as bacteria or viruses, to another food or surface. This process can happen in various ways, such as using the same cutting board for raw meat and vegetables without proper cleaning in between, or when raw juices from one food item drip onto another. It is a significant concern in food safety because it can lead to foodborne illnesses if harmful pathogens from one contaminated source spread to food that is ready to eat.

The other options imply issues that relate to food safety but do not directly define cross-contamination. Improper cooking methods might not effectively kill pathogens, storing food at incorrect temperatures can promote the growth of bacteria, and during delivery, although food safety practices are crucial, the direct mechanism of cross-contamination is specifically through the transfer of microorganisms.