<prompt> All are true about Balantidium coli except:It is a protozoaCyst is the infective stageUsually invades liverIt is the largest protozoan parasite inhabiting large intestine in man  <response>: Balantidium coli Only ciliate protozoa and the largest causing human disease ciliate dysentery. Infective stage: binucleate cyst; spherical, ellipsoid, 50-75mm, double layered cyst wall. The invasive form is the trophozoite - 80-120mm; two nuclei macronucleus, micronucleus, peristome, cytostome, cytopharynx, cytopyge. 