Biology 546
Human parasitology laboratory tutorial

The cross-section of the nematode on the left is from a histological section of a human appendix. The worm is about 300 micrometers in diameter. What species does it represent?

Ascaris lumbricoides
Enterobius vermicularis
Necator americanus
Trichuris trichiura

Original; photograph by S. J. Upton

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Kansas State University | Biology Division