Biology 546
Human parasitology laboratory tutorial

The worm on the left was passed in the stool of a small child in Manhattan, Kansas in 1966. The entire worm measured about 23 cm (9 inches) in length. What species is represented?

Ascaris lumbricoides
Enterobius vermicularis
Gnathostoma sp.
Necator americanus

Original; photograph by S.J. Upton

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Kansas State University | Biology Division