Ascaris is a genus of parasitic nematodes. One species, A. suum, typically infects pigs, taking up residence in the lower intestine, while another, A. lumbricoides, affects human populations, typically in tropical areas with poor sanitation. This infection is known as ascariasis. It is spread by the accidental ingestion of Ascaris eggs, which are produced in the lower intestine and distributed through feces.

See ascariasis for more information.

Roundworms

Ascaris | Ascaris (genre)