Aids to pathology.

  • Campbell, Harry (Physician)
Date:
[1910]
Catalogue details

Licence: In copyright

Credit: Aids to pathology. 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.

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    immature head (scolex) appears, the whole organism bemg afterwards enclosed by a fibrous capsule formed by condensation of the surrounding connective tissues of the host. This intermediate stage is known as the Cysticercus celluloses, or bladder-worm. Should the flesh of the animal harbouring the Cysticercus cellulosce now be consumed by another animal, the head of the cysticercus becomes everted, and, losing its bladder-hke appendac^e fastens itself to the intestine of the new host by means of its four suckers, and develops proglottides from its caudal end. Hydatid Cyst.—The intermediate stage of the Tcenia ecJunococcus is known as the hydatid. The embryos, Fig. 18.—Brood Capsule. provided with then- six hooks, enter the alimentary canal of some animal—say man—and their capsules being dissolved by the digestive juices of the host, they are set free. They then bore their way into the tributaries of the portal vein, and so reach the liver or other organ, where they come to rest. Each embryo now loses its hooklets, and is converted into a cyst, the walls of which are composed of concentric laminae lined by granular cells—the germinal membrane— and filled with a non-albuminous fluid rich in sodium chloride and containing the hooklets, which are of great diagnostic value. They are insoluble in acids. Withm the cyst are brood capsules; these are small vesicles which, originating from the germinal membrane, contain