Which item is not categorized as biological contamination?

Biological contamination refers to the presence of harmful microorganisms such as bacteria, viruses, fungi, or parasites in food or feed. These contaminants can pose health risks to consumers and can lead to foodborne illnesses.

The correct choice, which is pesticides, falls under chemical contamination rather than biological. Pesticides are substances used to prevent, destroy, repel, or mitigate pests, including weeds and insects. They do not originate from living organisms, which is a key characteristic of biological contamination.

In contrast, microbiological contamination pertains to the harmful microorganisms themselves, which directly relate to biological hazards. Prohibited mammalian protein could also be considered biological contamination, as it involves the protein component derived from animals, which can introduce pathogens. Decomposition in feed and feed ingredients can lead to the growth of microorganisms as the material breaks down, also making it a biological concern.

Thus, understanding the distinction between biological contaminants and other types, such as chemical ones like pesticides, is crucial for implementing effective HACCP measures and ensuring food safety.