A food-borne parasite found in under-cooked pork is:

The identification of Trichinella spiralis as a food-borne parasite associated with under-cooked pork is based on its biological characteristics and the type of infection it causes. Trichinella spiralis is a roundworm that can lead to trichinosis, a disease contracted when humans consume flesh infected with the larvae of the parasite. The larvae can be present in raw or undercooked pork products, and once ingested, they can invade intestinal walls and develop into adult worms. This can lead to a series of symptoms including gastrointestinal distress and more severe systemic effects as the larvae migrate through the body.

Understanding the specific risks associated with food items is critical for food safety practices. For instance, the other organisms mentioned, while they are all associated with foodborne illnesses, are linked to different food sources and pathogens. Salmonella commonly comes from undercooked poultry and eggs, Listeria monocytogenes is often found in unpasteurized dairy products and ready-to-eat meats, and Escherichia coli is frequently associated with undercooked ground beef and contaminated produce. Each pathogen has a unique source and method of transmission, which highlights the importance of proper cooking and food handling procedures.