Which parasite is associated with foodborne illness from undercooked pork?

Trichinella is the correct answer because it is a parasite primarily associated with foodborne illnesses that arise from the consumption of undercooked or raw pork. When pork that contains the larvae of Trichinella spiralis is inadequately cooked, the larvae can survive and develop into adult worms inside the human intestine, leading to a condition known as trichinosis. Symptoms may range from mild gastrointestinal distress to more severe complications affecting muscles and the nervous system.

Other parasites listed, such as Giardia, Cryptosporidium, and Toxoplasma, are associated with different foodborne illnesses or transmission routes. Giardia is often linked to contaminated water or food but is not specific to pork. Cryptosporidium also typically spreads through contaminated water sources rather than meat consumption. Toxoplasma gondii, while it can be contracted through undercooked meat, is more commonly associated with lamb and goat, as well as cat feces, making it less relevant in this specific context. Hence, Trichinella is the primary concern regarding undercooked pork.