An American text-book of the diseases of childrenIncluding special chapters on essential surgical subjects; orthopaedics, diseases of the eye, ear, nose, and throat; diseases of the skin; and on the diet, hygiene, and general management of children . lect of this undoubtedlyaccounts for the frequent failures to cure this troublesome affection. m. T^acNiA (Tape-worm). The common tape-Avorm is from twenty to fifty feet in length, of a whitecolor, and composed of numerous flattened segments, each of which, except INTESTINAL PARASITES. 533 those near the so-called head, is a complete hermaphrodite
An American text-book of the diseases of childrenIncluding special chapters on essential surgical subjects; orthopaedics, diseases of the eye, ear, nose, and throat; diseases of the skin; and on the diet, hygiene, and general management of children . lect of this undoubtedlyaccounts for the frequent failures to cure this troublesome affection. m. T^acNiA (Tape-worm). The common tape-Avorm is from twenty to fifty feet in length, of a whitecolor, and composed of numerous flattened segments, each of which, except INTESTINAL PARASITES. 533 those near the so-called head, is a complete hermaphrodite. Nourishment isabsorbed through the body-walls from the contents of the intestinal canal, inwhich the whole worm lies immersed. The head is a modified segmentabout the size of the head of a pin, and it is by this organ with its suckers orhooks that the worm retains its hold on the intestine. The segments near thehead are not much broader than a piece of thread, but they rapidly increase insize and become from one-quarter to one-half an inch broad at the other ex-tremity of the worm. Varieties.—The two species commonly found in this country are the beeftape-w^orm, Taenia mediocanellata, and the pork tape-worm, Tcenia solium. Fig. 5. Fig. Taenia Mediocanellata. Head and Maturement, Enlarged (Heller). Seg- Two other species may be mentioned, as theyare sometimes encountered: Tcenia nana andTcenia cucumerina. Another species, belong-ing to a different genus, Bothrioeejjhalus latus,is found only in certain parts of the continentof Europe. The beef and pork tape-worms (Figs. 5 and6) are easily distinguished by their heads, andless readily by the sexually mature pork tape-worm has a circle of hard chiti-nous hooks on the head, with four suckingdisks, and the head itself is somewhat head of the beef tape-w^orm is not pointed,and is provided with four suckers only, beingdevoid of the circle of hooks. This species mayalso be distinguished by the sexually m
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