Biology 546
Human parasitology laboratory tutorial

Fully sporulated oocysts, similar to those shown on the left, were found in the fresh feces of a new graduate student from Taiwan. Sporocysts measured about 13 micrometers in length. What species is most likely represented?

Cryptosporidium parvum
Cyclospora cayetanensis
Sarcocystis suihominis
Toxoplasma gondii

Original (oocyst actually from a green rat snake). Photograph by S.J. Upton.

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