Merck Manual

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Entamoeba histolytica cyst
entamoeba-histolytica-cyst-roberts-sized
Entamoeba histolytica cyst

    Photomicrograph of an E histolytica cyst in a fecal sample. Iron-hematoxylin stain; original magnification, 1000X.

Courtesy of Dr. Roger Klingenberg.