Biology 546
Human parasitology laboratory tutorial

The photograph on the left is from a fecal smear. The patient, a food handler in a local restaurant, had periodic bouts of diarrhea. The parasite cysts are variable in size, measure about 20-30 micrometes in length, and contain 8-16 nuclei. What species is represented?

Endolimax nana
Entamoeba chattoni
Entamoeba coli
Entamoeba histolytica

Original; photograph by S. J. Upton

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