Entamoeba coli

Entamoeba coli. Trophozoite and cyst in fecal smear (trichrome stain, oil immersion). A trophozoite and uninucleate cyst are seen side by side in this field. The trophozoite has a typical nucleus with an eccentric karyosome and coarse, irregular chromatin. The cyst contains a large glycogen mass that compresses the nucleus to the margin; chromatoid bodies with splintered ends are present at the margin of the cyst.

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