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Definition

Balantidiasis is an infectious disease produced by a single-celled microorganism (protozoan) called Balantidium coli that infects the digestive tract. It is primarily a disease of the tropics, although it is also found in cooler, temperate climates. Most persons with balantidiasis do not exhibit any noticeable symptoms (asymptomatic), but a few individuals will develop diarrhea with blood and mucus and an inflamed colon (colitis).

Description

Balantidiasis is caused by Balantidium coli, a parasitic protozoan that infects the large intestine. B. coli is the largest and only protozoan, having cilia or hair-like structures, that is capable of causing disease in humans. Balantidiasis occurs most commonly in areas with poor sanitation and in settings where humans live in close contact with pigs, sheep, or goats.