Unveiling Balantidium coli: A rare protozoan causing a series of cases of dysentery in Rajasthan and review of literature

Balantidium coli is the largest, uncommon, and only ciliate parasite that infects humans and is more common in tropics and subtropical regions. It is mostly asymptomatic, but can cause diarrhea and abdominal pain and sometimes leads to perforation of the colon. It is harbored in animals, particularly among pigs in hotter environments and monkeys in the jungles. If not treated on time, it may lead to perforation of the large intestine, peritonitis, appendicle involvement, etc. It is more common in immune-compromised individuals, particularly in those living in poor hygienic conditions. Retrieval of rare parasites was possible only because of prompt stool transport and its early processing. There are only few previous reports regarding the pediatric cases of balantidiasis, and there is a little information about its clinical signs and treatment. Here, we report a case series of B. coli infection presenting as an acute diarrheal disease from Rajasthan.