<unk> , along with<unk>  parvum, is among the medically important<unk>  species to humans.  It is an obligate parasite that can colonize the gastrointestinal tract resulting in the gastroenteritis and diarrhea characteristic of cryptosporidiosis.   Unlike C. parvum, which has a rather broad host range, C.<unk>  is almost exclusively a parasite of humans.   As a result, C.<unk>  has a low zoonotic potential compared to C. parvum.   It is spread through the fecal-oral route usually by drinking water contaminated with oocyst laden feces.
Cryptosporidium hominis
Blastocystis
Haemophilus ducreyi
Cyclospora cayetanensis
Giardia lamblia
Chlamydophila trachomatis
Dientamoeba fragilis
Trichomonas vaginalis