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  • Entamoeba histolytica. Trophozoites in fecal smear (trichrome stain, oil immersion). This cluster of trophozoites was seen in a patient with amebic dysentery. In two of the organisms the typical nuclear morphology is clearly evident, in a third organism the nucleus is slightly out of focus, and in the fourth the nucleus is not in the plane of focus. A single red blood cell is seen within the cytoplasm of two of the amebae.


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