Which of the following is NOT considered a biological hazard?

Pesticide residues are considered a chemical hazard rather than a biological hazard. Biological hazards typically include living organisms or their toxins that can cause illness in humans. This category comprises bacteria, viruses, and parasites, all of which are types of microorganisms that can contaminate food and lead to foodborne diseases.

Bacteria, such as Salmonella or E. coli, can multiply in food and cause serious health issues. Viruses, like Norovirus or Hepatitis A, can also be transmitted through contaminated food and are a common cause of food-related illnesses. Parasites, including Giardia and Trichinella, can infest food products and lead to gastrointestinal infections.

In contrast, pesticide residues are chemical compounds resulting from the application of pesticides on crops. While they can pose health risks if ingested in significant amounts, they do not fall under the category of biological hazards because they are not living organisms or their byproducts. This distinction is crucial for understanding food safety and the different types of hazards that can affect food products.