Medicine: Earthworms, Roundworms

Last week two learned pharmacologists bickered politely over intestinal worms. The roundworm, which resembles the earthworm in form, is the most common parasite which infests the intestines of human beings. Children between the ages of three and ten are especially good hosts for these worms. Male roundworms grow four to eight inches long, females seven to twelve inches. In some cases as many as 1,000 have been found, but usually only half a dozen roundworms infest an intestine. They live on blood drained from the intestinal wall.

Such worms may travel from the...

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