. Internal medicine; a work for the practicing physician on diagnosis and treatment, with a complete Desk index. .5-6 mm. in length and mm. inbreadth, having a scolex armed with a double row of twenty-eight to fiftybooklets on the rostellum and composed of three or four segments, ofwhich the posterior only is mature. The mature segment contains about5000 ova. This parasite Hves in the small intestine of the domestic dog. DISEASES DUE TO CESTODES. 259 Tlu larval or cysticiTcus staj^o passed in various orpjans of numerousspccios of maiunials, especially the sheep, ox, and hog. Man occas
. Internal medicine; a work for the practicing physician on diagnosis and treatment, with a complete Desk index. .5-6 mm. in length and mm. inbreadth, having a scolex armed with a double row of twenty-eight to fiftybooklets on the rostellum and composed of three or four segments, ofwhich the posterior only is mature. The mature segment contains about5000 ova. This parasite Hves in the small intestine of the domestic dog. DISEASES DUE TO CESTODES. 259 Tlu larval or cysticiTcus staj^o passed in various orpjans of numerousspccios of maiunials, especially the sheep, ox, and hog. Man occasionallyacquires echinoeoccus by ingesting the oncospheres in caressing or otherwisecoming into too close contact with infected dogs, or using the same and Development. — Echinoeoccus or bladder-wormconsists of a cyst or vesicle filled with a watery fiuid, which may attainin man the size of a childs head but in cattle does not often exceed thedimensions of an orange or apple. The thin wall of the cyst consists of twodistinct layers, an external, laminated, cuticular membrane or capsule and. Fig. 297 r?6tti -1, Taenia echinoeoccus; 2, mother and daughter cysts (from Allen preparation); 3, hooks. r><* •K/n an internal, germinal, or parenchymatous layer, the endo-cyst. After a time the cyst acquires an outer or accidentalfibrous investment. The development in cattle is oftenarrested at this point and the cysts are then known asacephalocysts or sterile echinoeoccus cysts. In other casesin domesticated animals brood capsules are formed withinthe space, upon the outer surface of which the granular orparenchymatous layer is found. From this surface ariselittle buds or projections which develop into scolices suppliedwith four sucking discs and a circle of booklets. Whentransferred to the intestine of the dog each scolex may con-stitute the head of a mature tapeworm. This form is termed Echinoeoccusveterinorum or fertile echinoeoccus cyst. In man the m
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmedicine, bookyear192
