. Zoology : for students and general readers . Zoology. 158 ZOOLOGY. suiBcient to kill the Cysticerci. Butchers especially suffer from tape-worms, from their habit of eating bits of raw meat, beef and veal harboring Cysticerci, which transform into species of Tainia nearly as injurious as Tmnia solium. As a matter of course, in the use of drugs to expel a tape- worm, they should be pushed so as to carry off the entire animal, as new segments grow out from near the head as rapidly as the proglottides are detached. The Cysticercus of another injurious tape-worm lives in the muscles and internal
. Zoology : for students and general readers . Zoology. 158 ZOOLOGY. suiBcient to kill the Cysticerci. Butchers especially suffer from tape-worms, from their habit of eating bits of raw meat, beef and veal harboring Cysticerci, which transform into species of Tainia nearly as injurious as Tmnia solium. As a matter of course, in the use of drugs to expel a tape- worm, they should be pushed so as to carry off the entire animal, as new segments grow out from near the head as rapidly as the proglottides are detached. The Cysticercus of another injurious tape-worm lives in the muscles and internal organs of cattle. This is the Tmnia mediocanellata of Kuchen- meister, which is larger, with a larger darker head, larger suckers, and with- out a rostrellum or hooks. By far the most injurious species is Tmnia ecMnococ- cns Siebold (Fig. 108), more frequently causing death than any other en- tozoon. In its adult or strohila state this worm only infests the dog and wolf, but its larva, the hydatid of physicians, fre- quently occurs in the hu- man body. It is very small, seldom exceeding six millimetres in length, there being but four segments, including the head, which has a pointed rostellum, with a double crown of large-rooted hooks ; there are four suckers present, and the last segment, when sexually mature, is as long as the anterior ones taken together. The hydatid {jwoscolex) forms large proliferous vesicles, in which the scolices (Echinococcus heads) are de- veloped by budding internally. About five thousand eggs. Fig. 107.—Proglottis ot T. solium, a, testis ; ft, Bpemi duct ; c. orifice of cirrus ; d, matrix filled with eggs ; e, vagina ; /, sexual cloaca.— After Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Packard, A. S. (Alpheus Spring), 1839-1905. New York : Henry Holt
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1879
