Practical pathology; a manual for students and practitioners . ing glass, the small specks areseen to be cysts, in which, coiled up, lie the larval trichinae. Rupturethe cyst with a couple of needles, turn out the trichina, and under themicroscope examine the specimen, after staining (§ 102) and mounting(§ 195). It is about tjV of an inch long, and is provided with analimentary canal and imperfectly developed reproductive of the white specks are quite hard and calcareous. If these aretreated with hot caustic potash or soda, they remain unaffected, but a NEMA TO DBS— TRIG HIN EL L A
Practical pathology; a manual for students and practitioners . ing glass, the small specks areseen to be cysts, in which, coiled up, lie the larval trichinae. Rupturethe cyst with a couple of needles, turn out the trichina, and under themicroscope examine the specimen, after staining (§ 102) and mounting(§ 195). It is about tjV of an inch long, and is provided with analimentary canal and imperfectly developed reproductive of the white specks are quite hard and calcareous. If these aretreated with hot caustic potash or soda, they remain unaffected, but a NEMA TO DBS— TRIG HIN EL L A SPIRALIS 755 very weak solution of hydrochloric acid dissolves out the hard materialand leaves the capsule soft and pliable. Harden a piece of the trichinous muscle (.^ 61 or 63); cut, and withthe aid of a lens find a section in which is at least one cyst, stain (§^ 102,104, or 110 {b\ and 132), and mount (^ 195 or 199). (x 50).—The cyst is situated between the muscular fibres, which inthe immediate neighbourhood are somewhat compressed; it is lemon-. FiG. 262.— Trichinella spiralis encysted. Stained with picro-carmine. (X300.) a. Atrophied muscle fibres. b. Fat cells situated at the end of the cyst. c. Capsule becoming calcified. d. Protoplasm sunoundinj^ the worm. e. Trichina coiled up in the cyst. shaped, and contains the larval worm arranged in one, two, or threecoils. At each pole, outside the cyst, a few fat globules, with smallblood vessels running amongst them, may be seen. The cyst itself isin the first instance fibrous, being derived from proliferated sarcolemmacells. In the specimen from which Fig. 262 was taken, calcification ofthis fibrous covering was beginning at the poles. Where completecalcification has taken place, a fibrous covering is still present. Within 756 ANIMAL PARASITES the first cyst is a second membranous or chitinous coat which m turnmay become calcified, whilst within this again is a quantity of granularprotoplasm, in which the worm is i
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