ascaris the parasitic nematode worm.

ancylostoma animal ascariasis ascaridida ascarididae ascaris bathworm bowel chromadorea disease duodenale enterobius epidemic fecal feces floor germ gut health helminth hookworm human infection infestation intestinal intestine lumbricoides lumen macro magnification microscope microscopic nature nematoda nematode parasite parasitic pinkish pinworm roundworm science small suum toilet trichinella trichiura trichuris vermicularis whipworm worm