A metazoan, pathogenic to humans.
A genus of minute parasitic nematode worms. The adults of T. spiralis live in the small intestine of man, where the females release large numbers of larvae. These bore through the intestinal wall and can cause disease. The parasite can also develop in pigs and rats.
A genus of nematode worms belonging to the suborder Trichurata. They are parasitic in humans, hogs, rats, and many other mammals.