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[Entamoeba histolytica]

Entamoeba histolytica/Entamoeba dispar trophozoites have a single nucleus and usually measure 15 to 20 µm (range 10 to 60 µm), tending to be more elongated in diarrheal stool.

A	B

A, B: Trophozoites of E. histolytica/E. dispar in a direct wet mount stained with iodine.