Infection by parasites of the genus BALANTIDIUM. The presence of Balantidium in the LARGE INTESTINE leads to DIARRHEA; DYSENTERY; and occasionally ULCER.

Synonyms: Balantidium coli Infection, B. coli Infection, Infection, B. coli, B. coli Infections, Balantidium Infections, Balantidium coli Infections, Balantidiases, Balantidiasis, Balantidium Infection