What type of roundworm is associated with trichinosis in humans?

Trichinosis is specifically associated with the roundworm known as Trichinella spiralis. This parasitic infection occurs when humans consume undercooked or raw meat that contains the larvae of this particular worm, commonly found in pork or wild game. Once ingested, the larvae emerge in the intestines, mature, and then invade the muscle tissue, leading to various symptoms including gastrointestinal distress and muscle pain.

The other options reference different types of roundworms that do not cause trichinosis. Ascaris lumbricoides, for instance, is known for causing ascariasis, a condition resulting from a different type of roundworm infection associated with malnutrition and digestive issues. Enterobius vermicularis, commonly known as pinworm, primarily causes enterobiasis, which is most associated with anal itching and is prevalent in children. Hookworms are a group of intestinal parasites that can lead to anemia and protein deficiency, yet they are distinct from Trichinella spiralis and do not cause trichinosis.