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[Endolimax nana] [Entamoeba coli] [Entamoeba hartmanni] [Entamoeba polecki] [Iodamoeba buetschlii]

Endolimax nana trophozoites each have one nucleus with a characteristically large, irregularly shaped, blot-like karyosome.  Their nucleus has no peripheral chromatin.  Their cytoplasm is granular and vacuolated.  The trophozoites measure usually 8 to 10 µm (range 6 to 12 µm).

A	B

A: Line drawing of an E. nana trophozoite.
B: E. nana trophozoite stained with trichrome.

C	D

C, D: E. nana trophozoites stained with trichrome.

E

E: E. nana trophozoite stained with trichrome and measuring about 9 µm.  Image contributed by the Kansas Department of Health and Environment.