<unk>  is a protozoan that causes disease in humans, and possibly in other primates.  It has also been isolated from the feces of other animals such as ducks and chickens.  Due to the spherical shape of<unk>  sporocytes, it was placed in the<unk>  genus.  It has a double layered wall that gives it resistance against disinfectants and adhesins which are responsible for its adherence characteristics.  The bacteria show tropism for epithelial cells of the small intestine, especially of the duodenum and jejunum.
Cyclospora cayetanensis
Cystoisospora belli
Mansonella streptocerca
Cryptosporidium hominis
Naegleria fowleri
Epicoccum nigrum
Pygeum africanum
Mycobacterium celatum