Biology 546
Human parasitology laboratory tutorial

The photograph on the left is from a fecal smear from an individual complaining of periodic bouts of diarrhea and intestinal discomfort. The parasites were numerous, quite variable in size, but the majority measured about 15-20 micrometers in diameter. What species is represented?

Blastocystis hominis
Cyclospora cayetanensis
Isospora belli
Pneumocystis carinii

Original; photograph by S. J. Upton

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