Biology 546
Human parasitology laboratory tutorial

The photograph on the left is of an oocyst; one of a scant few found in a human fecal sample following flotation. It measured about 8 micrometers in length, and contained fully developed sporozoites and a residuum. What in the world is it?

Cryptosporidium parvum
Isospora belli
Sarcocystis hominis

Original; photograph by S. J. Upton

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Kansas State University | Biology Division