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a species of ameba found in the large intestine of humans, other primates, and dogs; now considered to be a distinct species that is nonpathogenic and smaller than Entamoeba histolytica but otherwise indistinguishable from it; formerly called the "small race" of Entamoeba histolytica.
A commensal species (one that does not cause disease). It lives in the colon.
See also: Entamoeba