Blastocystis hominis (2 µm to 20 µm) in stools

France, CHU Angers Parasitologie-Mycologie

The classic form, present on this pic, has several peripheral nuclei, and is characterized by a large central body, visually like a large vacuole which does not stain with Lugol iodine. Blastocystis hominis may also have a cyst appearance, or may display several intra-cytoplasmic bodies.