Diagnostic methods, chemical, bacteriological and microscopical : a text-book for students and practitioners . nd obtuse posteriorly with complete organization as inthe adult and showing the characters of the different sexes. This parasite or its larvae are rarely if ever found in the stools. In its adultsexual stage it infests the intestinal tract of man and a number of mammalians,gives origin to a large number of larval worms, after which the adults die. Thelarvae pass through the muscular wall of the intestine and are carried by theblood-current into various muscles of the host. Here they p
Diagnostic methods, chemical, bacteriological and microscopical : a text-book for students and practitioners . nd obtuse posteriorly with complete organization as inthe adult and showing the characters of the different sexes. This parasite or its larvae are rarely if ever found in the stools. In its adultsexual stage it infests the intestinal tract of man and a number of mammalians,gives origin to a large number of larval worms, after which the adults die. Thelarvae pass through the muscular wall of the intestine and are carried by theblood-current into various muscles of the host. Here they pass an indefiniteencysted stage, a capsule forming around them and becoming calcified. Herrickand Janeway^ have recently reported the finding of the embryo of this parasite J Arch, of Int. Med. vol. 3, 1909, p. 263. THE FECES. 141 in the circulating blood of a patient. The blood was laked with 3 % aceticacid; was centrifuged, and the sediment examined as outlined byStaiibli. Thechief means of infection of man with the trichinella spiralis is through theeating of insufficiently cooked pork, especially Fig. 45.—Trichinella spiralis: a, Gravid female intestinal trichiura; E, embryos;G, vulva; Ov, ovar ; h, adult male, intestinal trichiura; T, testicles; C, young larva;d, larva in musculature; e, encapsulated larva in muscle. {Tyson after Braitn ) 142 DIAGNOSTIC METHODS. (d). Strongylidse. (i). Uncinaria duodenalis. Synonyms.—Anchylostoma duodenale; strongylus quadridentatus; dochmiusanchylostonium; sclerostoma duodenale; strongylus duodenalis; dochmius , and European hook-worm. The male parasite is whitish or blotched posteriorly with brownish whenthe intestine contains blood; 8 to lo mm. long; cuticle finely striated transversely;tapering to a blunt point anteriorly and with head curved upon the dorsum soas to give a slightly hooked anterior end; on each side of the median line on theventral side of oral border two hook-like chitinous teeth and on dorsal bor
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