A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . tapeworm with three circles of hooks, togetherwith the occurrence in one case at least of this peculiarform side by side with C. cellulosw, have led mostinvestigators to regard C. acanthotrias as merely avariety of the common pork bladder worm. D istribution.—Tania solium is notso widely distributedas T. saginata, al-though partaking ofthe cosmopolitancharacter of the lat-ter. It is rare intropical lands, andwanting among suchraces as abstain fromthe use of pork. O
A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . tapeworm with three circles of hooks, togetherwith the occurrence in one case at least of this peculiarform side by side with C. cellulosw, have led mostinvestigators to regard C. acanthotrias as merely avariety of the common pork bladder worm. D istribution.—Tania solium is notso widely distributedas T. saginata, al-though partaking ofthe cosmopolitancharacter of the lat-ter. It is rare intropical lands, andwanting among suchraces as abstain fromthe use of pork. Onthe other hand, es-pecially in those re-gions where the in-habitants are accus-tomed to eat the fleshof the pig in a poorlycooked condition, theparasite is mostabundant. Certain provinces of continental nations come within theselimits. Contrary to the statements of a number ofolder authorities, I am confident from the eWdencegathered that this species is very rare at present inthe United States. Some figures have been adducedto show that it is becoming decidedly rarer in bothFrance and Germany. In Denmark it was, in 1869,. Fig. —.\pical View of Scolexand Hooks of Cysticercus 50. (.Wter Weinland.) REFERENCE HANDBOOK OF THE MEDICAL SCIENCES Cestoda the commonest human cestode, being present in 53out of 100 cases; in 1887-95 it was not found oncein 100 cases (Krabbe). Ci/sticercus cellulosa- is present not only in the piRbut also in the wild boar, deer, dog, eat, rat, brownbear, ai>e, and even man himself. In the i)ig thebladder worm is more al)undaut in such animals asare allowed to range than in those that arc stall Cerniany the ratio of infected animals varies indifferent provinces from 1 in 100 to 1 in 2,000 accord-ing to reports of meat inspectors. As these cover,however, only the cases in which the infection is Erominent, the actual figures are much larger,euckart calcidated some years ago that two to threepigs per hundred were infected. T
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