Diagnostic Parasitology

Dientamoeba fragilis
Dientamoeba fragilis is currently classified as an amoeba flagellate, even though it lacks a flagella, and it seems to be closely related to Trichomonas sp. The trophozoites are generally between 9-15 µm in diameter and contain one or two nuclei. The nuclear chromatin is usually fragmented.  There is no cyst stage. D. fragilis are best detected in permanent -stained fecal smears.

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Copyright 2008 Don Lehman