Balantidium coli: The Overlooked Parasite Triggering Digestive Distress
- Jul 13
- 3 min read
Updated: Jul 30
Balantidium coli is a large, ciliated protozoan parasite that infects the human large intestine and causes a condition known as balantidiasis. It is the only ciliate known to be pathogenic to humans. This parasite is more common in regions with poor sanitation, especially where pigs are raised, as pigs are the primary reservoir.
Cause and Transmission
Balantidium coli infection occurs through ingestion of cysts in contaminated water or food, or by contact with feces from infected individuals or animals. Once inside the body, the cysts transform into trophozoites in the large intestine, where they multiply and can invade the intestinal lining.
Where They Are Found in the Body
