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Description:This trichrome-stained photomicrograph depicts an Entamoeba histolytica trophozoite, within which a number of erythrocytes can be seen as dark inclusions.
Erythrophagocytosis, which is the ingestion of red blood cells into the parasite’s cytoplasm, is the only characteristic that can be used to differentiate morphologically E. histolytica from the nonpathogenic E. dispar.

Several protozoan species in the genus Entamoeba colonize humans, but not all of them are associated with disease. Entamoeba histolytica is well recognized as a pathogenic amoeba, associated with intestinal and extraintestinal infections. The other species are important because they may be confused with E. histolytica in diagnostic investigations.

High Resolution: Click here for hi-resolution image (19.52 MB)
Content Providers(s):CDC/ Dr. Mae Melvin; Dr. Greene
Creation Date:1966
Photo Credit:
Links:CDC – Div. of Parasitic Diseases; Amebiasis
CDC Organization
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Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.