Taxonomy: Ciliophora
Animal: Balantidium coli 3 07.jpg
Sites: Gut
Balantidium coli trophozoites - 50 - 100 microns x 40 - 70 microns with kidney shaped macro nucleus and a micro nucleus, cytostome and cillia in faecal smear stained with Pap stain. Causes balantidiasis - ulcers are wider mouthed than in amoebic dysentry. This case was a 5 year old male in PNG

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