Taxonomy: Class Blastocystea
Animal: Blastocystis hominis 8 03.jpg
Blastocystis hominis - granular form. The avacuolar form changes to a multi-vacuolar form and then a central vacuolar form and then a granular form (all 5-20 microns with 1-4 nuclei) when cultured or passed in faeces. These forms were thought to be possibly the typical and only forms of B.hominis but they are not the forms in the colon. Trichrome stain.
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