Hookworms

Ascaris is a parasitic roundworm. Also, there are pinworms, hookworms, trichina and filarial worms.

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... parasites. “Over 1.4 billion people carry the snakelike roundworm Ascaris lumbricoides in their intestines; almost 1.3 billion carry blood-sucking hookworms; 1 billion have whipmorm,” writes Zimmer. At least two million people a year die of malaria, a disease caused by the protozoan Plasmodium. ...

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... contained a single nematode-like organism. Although this is outside my area of expertise, the morphology was most similar to filariform larvae of hookworms or possibly a larval form of Ascaris (roundworm). The organisms were identical in morphology. Their presence was not readily observable because ...

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