Image:Balantidium trophB.JPG leftframeA trophozoite of ''Balantidium coli'' Cyst s are the parasite stage responsible for transmission of balantidiasis.
taxon = '''''B. coli'''''}} {{Taxobox_end_placement}} {{Taxobox_end}} '''''Balantidium coli''''' is a species of ciliate protozoan, and is the only one that is a pathogen of humans.