[Last Modified: ]
[Endolimax nana] [Entamoeba coli] [Entamoeba gingivalis] [Entamoeba hartmanni] [Entamoeba polecki] [Iodamoeba buetschlii]

Trophozoites of Entamoeba coli usually measure 15 to 50 µm.  The trophozoites possess a single nucleus with a characteristically large, eccentric karyosome and coarse, irregular peripheral chromatin.  The cytoplasm is usually coarsely granular and vacuolated (often described as "dirty" cytoplasm).  Pseudopodia may be seen, and are often short and blunt; movement in living trophozoites is nondirectional.

A	B

A, B: Trophozoites of E. coli stained with trichrome.

C	D

C, D: Trophozoites of E. coli stained with trichrome.