. Animal parasites and human disease. Medical parasitology; Insects as carriers of disease. 276 OTHER INTESTINAL ROUNDWORMS The symptoms produced by Ascaris infection vary greatly with different individuals. In some cases a great number of Ascaris may be harbored with practically no ill effects. Often, however, even when small numbers are present, peculiar mental and constitutional ailments occur, such as feverishness, anemia, restle'ssness, epilepsy, insomnia and deliriousness. In combina- tion with these nervous troubles there is usually some dyspeptic trouble, such as irregular appetite, na
. Animal parasites and human disease. Medical parasitology; Insects as carriers of disease. 276 OTHER INTESTINAL ROUNDWORMS The symptoms produced by Ascaris infection vary greatly with different individuals. In some cases a great number of Ascaris may be harbored with practically no ill effects. Often, however, even when small numbers are present, peculiar mental and constitutional ailments occur, such as feverishness, anemia, restle'ssness, epilepsy, insomnia and deliriousness. In combina- tion with these nervous troubles there is usually some dyspeptic trouble, such as irregular appetite, nausea and stomach aches. The nervous and other constitutional symptoms are the result of poisoning or intoxication from sub- stances given off by the worms in the intestine, as explained in Chapter XI, p. 203. The worms occasionally creep forward into the throat or nose. Their wandering into other organs through ducts leading from the intestine or into the body cavity through the in- testinal walls often gives rise to serious abscesses which call for an operation and removal of the intruders. Santonin has been the classical drug for expelUng Ascaris, but oil of chenopodium has recently been demonstrated to be considerably more effective. According to Hall and Foster oil of chenopodium, properly administered (see Chap. XIV, p. 264), is almost 100 per cent effective for. Fig. 110. Human whipworm, Trichuris irichiura: A, female; ov., ovary; ut., uterus; v., vulva; int., intestine; w., whiplike an- terior end containing oesophagus. X 3. B, egg; note barrel shape ascarids, and is more dependable than x°56o!''"^"^' ^""^'^^ ^^ ""'''â *^^y 0*^^^ dâ¢g commonly used for worms. Whipworm. â With the possible exception of the hookworms, the whipworm, Trichuris trichiura (Figs. 106 and 110), is the most common intestinal worm parasitic in man. It is a nema- tode related to the trichina worm in which the anterior end of the body is drawn out into a long fil
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