Biology 546
Human parasitology laboratory tutorial

The worm on the left was one of several passed in the stool of a Manhattan resident following antiparasitic therapy. The worm measured nearly 18 cm (7 inches) in length. What species is represented?

Ascaris lumbricoides
Dioctophyma renale
Dracunculus medinensis
Trichuris trichiura

Original; photograph by S.J. Upton

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Kansas State University | Biology Division