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Introduction to Nematodes

By Richard D. Pearson, MD, University of Virginia School of Medicine

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Nematodes are nonsegmented cylindric worms ranging from 1 mm to 1 m in length. Nematodes have a body cavity, distinguishing them from tapeworms and flukes. Depending on the species, different stages in the life cycle are infectious to humans. Hundreds of millions of humans are infected with nematodes; the most common are Ascaris, hookworms, and Trichuris.

* This is the Professional Version. *