<unk>  is a single celled parasite that infects the gastrointestinal tract of humans.  Trophozoites of D.<unk>  characteristically have two nuclei, hence the 'DI' prefix to the genus name. However, the rest of the genus name indicates that it is an ENTeric AMOEBA and not that it is related to intestinal parasites of the genus Entamoeba. The species name refers to the fact that the trophozoite stages are fragile - they do not survive long in the stool after leaving the body of the human host.
Dientamoeba fragilis
Entamoeba histolytica
Giardia lamblia
Balantidium coli
Cryptosporidium hominis
Clostridium difficile
Gardnerella vaginalis
Ascaris lumbricoides