The theory and practice of hygiene (Notter and Firth) revised and largely re-written / by R.H. Firth.

  • Notter, J. L. (James Lane), 1843-1923.
Date:
1908
Catalogue details

Licence: In copyright

Credit: The theory and practice of hygiene (Notter and Firth) revised and largely re-written / by R.H. Firth. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

    613/1096 (page 579)
    development and life history of this parasite is analogous to that of T. saginata, with the exception that the corresponding bladder-worm {Cysti(ie)-cus celhilosce) has a special preference for the muscles of the pig, but, according to Leuckart, is occasionally found in other animals. Its occurrence in the pig is usually very abundant, where it constitutes measly pork (fig. 109). The great majority of the cysticerci average between 3 and 4 mm. in size, but some are both larger and smaller. They are killed by exposure to a temperature of 50° C. _ It must not be overlooked that, although the pig is the most frequent intermediate host for this bladder-worm, man himself may become the intermediate bearer, as this cysticercus develops also within the human body. The above fact leads us to the question: By what way does man become infected by these embryos? An infection by some means must precede the appearance of cysticerci, and its channel can only be by the alunentary canal. The most direct and frequent source of infection is in Fig. 108.—Head of T. solium (after Leuckart). rig. 109.—Muscle containing Cysticerci celluloses (after Leuckart). the eggs, which are dispersed about the abode of the tapeworm, and also widely distributed in the open air with the excrement. These may reach mans digestive tract either by water, food, or by the hand. This latter yenicie ot miection is by no means unknown in the case of children and the insane whde the normal adult tapeworm patient may readily infect toTe m^uth °^ ^' ^''^^^^ <i^^ing «leep, by Hfting the hand • ^^.^'^ considerations suggest the special need of cleanhness when an inmate of the house suffers from this parasite. The linen of the patient ^ !i. changed, the buttocks, perineinn, and hands frequently washed the excreta carefully removed, and all voided proglottides burnt without touchmg the hands. Of all persons, the patient is himself in ' greatest danger of infection. The experimental evidence of this danger of ■ seit-mtection has been supplied by Kiichenmeister, who reared both mature and immature taenia of this species in condemned criminals; wlule, imder