Ascaris lumbricoides is a human parasitic roundworm, which causes ascariasis, and occurs in roughly one billion people worldwide, including four million in the US. Scientific classification - Wikipedia /**/ @import /skins/monobook/IE50Fixes. ... Phyla Porifera (sponges) Ctenophora (comb jellies) Cnidaria Placozoa Bilateria Acoelomorpha Orthonectida Rhombozoa ?Myxozoa Superphylum Deuterostomia    Chordata (vertebrates, etc. ... Classes Adenophora    Subclass Enoplia    Subclass Chromadoria Secernentea    Subclass Rhabditia    Subclass Spiruria    Subclass Diplogasteria The roundworms (Phylum Nematoda) are one of the most common phyla of animals, with over 20,000 different described species. ... The order Ascardidida includes several families of parasitic roundworms with three lips on the anterior end. ... In biology, binomial nomenclature is a standard convention used for naming species. ... A parasite is an organism that lives in or on the living tissue of a host organism at the expense of it. ... Classes Adenophorea    Subclass Enoplia    Subclass Chromadoria Secernentea    Subclass Rhabditia    Subclass Spiruria    Subclass Diplogasteria The roundworms (Phylum Nematoda) are one of the most common phyla of animals, with over 20,000 different described species. ... Ascariasis is a debilitating human disease caused by the roundworm Ascaris lumbricoides; other species of Ascaris are parasitic in domestic animals (see Nematode). ...

A. lumbricoides is the largest nematode (roundworm) which parasitizes the human intestine. Adult females are 20 to 35 cm in length, and adult males 15 to 30 cm. For this reason, it is called the giant intestinal roundworm.

See also

Ascariasis Ascariasis is a debilitating human disease caused by the roundworm Ascaris lumbricoides; other species of Ascaris are parasitic in domestic animals (see Nematode). ...