Blastocystis microscopy

(A, B) Blastocystis spp cyst-like forms stained in trichrome. The nuclei in the peripheral cytoplasmic rim are visible, staining purple.
(C, D) Blastocystis spp cyst-like forms in a wet mount stained in iodine.
(E) Blastocystis spp cyst-like form in a wet mount, unstained.