NCIt definition : A species of ciliated intestinal protozoan parasites in the family Balantiididae.
Infection occurs by ingestion of a cyst, with the motile trophozoite residing in the
large intestine. B. coli is the largest protozoan that infects humans.;
Alternative definition : CDISC: Any unicellular, eukaryotic organism that can be assigned to the species Balantidium
coli.;