Biology 546
Human parasitology laboratory tutorial

The photograph on the left is an acid fast stain from a fecal smear of an AIDS patient with periodic bouts of diarrhea and abdominal cramping. The cyst-like stage shown measures about 30 micrometers in length. What species is represented?

Cryptosporidium parvum
Cyclospora cayetanensis
Isospora belli
Toxoplasma gondii

Original; photograph by S. J. Upton

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Kansas State University | Biology Division