Ascaris lumbricoides is the "large roundworm" of humans, growing to a length of up to 35 cm Eggs released by adult females are shed in feces. Unfertilized.
Ascaris species are very large (adult females: 20 to 35 cm; adult males: A. lumbricoides is the primary species involved in human infections.
Causal Agents. Ascaris species are very large (adult females: 20 to 35 cm; adult males: 15 to 30 cm) nematodes (roundworms) that parasitize.
Of these, the intestinal roundworm Ascaris lumbricoides is the most common. Adult worms may live in the gut for 6-24 months, where they can.