⚠ Answer to the parasitology problem: Balantidium coli. It causes the disease - Balantidiasis.
✅ This protozoan is the largest of those infecting humans and the only ciliated parasite of humans. It has circumferential cilia and a large nucleus - macronucleus (not very well seen in the images), which give it a striking appearance.
👉 The case was provided by Professor Philippe Poirier, Dr. Céline Nourrisson, and Dr. Maxime Moniot from the Department of Parasitology and Mycology of the National Reference Center for Cryptosporidiosis, Microsporidia, and other digestive tract protozoa of the Clermont-Ferrand University Hospital, France.
