<unk>  is the "large roundworm" of humans, growing to a length of up to . It is one of several species of<unk> . An<unk>  nematode of the phylum Nematoda, it is the most common parasitic worm in humans. This organism is responsible for the disease<unk> sis, a type of helminthiasis and one of the group of neglected tropical diseases. An estimated one-sixth of the human population is infected by<unk>  or another roundworm.<unk> sis is prevalent worldwide, especially in tropical and subtropical countries. It has been proposed that<unk>  and<unk>  suum (pig roundworm) are the same species.
Ascaris lumbricoides
Taenia asiatica
Entamoeba coli
Trichuris trichiura
Taenia solium
Taenia saginata
Schistosoma mansoni
Schistosoma haematobium