Biology 546
Human parasitology laboratory tutorial

The worm on the left was found attached to the wall of the small intestine of a patient undergoing intestinal surgery for another matter. You are viewing the buccal cavity of the parasite. What species does it represent?

Ancylostoma duodenale
Ascaris lumbricoides
Necator americanus
Trichuris trichiura

Original; photograph by S. J. Upton

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Kansas State University | Biology Division