What is a parasite?

A parasite is defined as a life form that lives on or within another organism, known as the host, and derives nutrients at the host's expense. This relationship typically harms the host, as the parasite often consumes the host's resources and may lead to negative health effects. Common examples of parasites include certain types of worms, protozoa, and some insects that rely on other organisms for their survival and reproduction.

This understanding is essential in the context of food safety because many foodborne illnesses are caused by parasitic organisms that can infect humans through contaminated food or water sources. Recognizing the nature of parasites helps food handlers adopt safer practices to prevent contamination and ensure the health of consumers.