What parasitic infection is associated with eating undercooked pork?

Trichinosis is the correct answer as it is specifically associated with the consumption of undercooked pork that is infected with larvae of the Trichinella species. When a person ingests these larvae, they can develop into adult worms in the intestines, leading to a range of symptoms such as gastrointestinal discomfort and muscle pain as the larvae migrate through the body and invade muscle tissues.

In contrast, Giardiasis is caused by a protozoan parasite found in contaminated water and is not linked to pork consumption. Schistosomiasis is caused by trematodes (flukes) and is acquired through contact with contaminated freshwater, primarily from the larvae penetrating the skin, rather than through dietary sources. Ascariasis is an intestinal infection caused by the Ascaris lumbricoides roundworm, typically transmitted through ingestion of eggs in contaminated food or soil, but it is not related to undercooked pork consumption. Thus, the association of Trichinosis with undercooked pork makes it the correct choice for this question.