Intestinal Protozoa: Amebas

In: Medical Microbiology. 4th edition. Galveston (TX): University of Texas Medical Branch at Galveston; 1996. Chapter 79.


Amebas are unicellular organisms common in the environment: many are parasites of vertebrates and invertebrates. Relatively few species inhabit the human intestine and only Entamoebahistolytica is identified as a human intestinal pathogen. A second pathogen of the human colon is Dientamoeba fragilis, which looks like an ameba under the light microscope, and was classified as a true ameba for many years, but which is now identified as a flagellate.

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