Microsporidians

Enterocytozoon bieneusi. Spores in duodenal aspirate material (modified trichrome stain, high power). Large numbers of pink-staining spores of the human microsporidian parasite, E. bieneusi, are seen in this stained smear prepared from a concentration of duodenal aspirate material. Their small size under light microscopy makes their detection difficult, especially when they are present in small numbers amidst fecal debris.