Biology 546
Human parasitology laboratory tutorial

The photograph on the left represents one of a moderate number of unsporulated oocysts present in the feces of a patient with diarrhea and abdominal cramping. Each oocyst measures about 9 micrometers in diameter. What species is represented?

Cryptosporidium parvum
Cyclospora cayetanensis
Enterocytozoon bieneusi
Isospora belli

Original; photograph by S.J. Upton.

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