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[Entamoeba histolytica]

A	B	C

A, B, C: Endolimax nana cysts.  The cysts when mature have 4 nuclei with large, blot-like karyosomes (line drawing, A; wet mount in iodine, B; trichrome stain, C).  The cysts of E. nana do not have chromatoid bodies.  The cysts measure 6 to 8 µm (range 5 to 10 µm).