The hygiene of transmissible diseases; their causation, modes of dissemination, and methods of prevention . between the time ofingestion of the larvae of this worm and the appearance ofproglottides in the dejecta. Tcenia saginata is commoner in this country than is tcBiiiasolium, probably owing to the greater care that is given tothe cooking of pork. Bothriocephalus latus, a large, long cestode found morecommonly in those whose diet is composed of fresh fish. Itis said to be common in the Baltic provinces and in parts ofSwitzerland. In its larval form it is often encountered in theabdominal ca
The hygiene of transmissible diseases; their causation, modes of dissemination, and methods of prevention . between the time ofingestion of the larvae of this worm and the appearance ofproglottides in the dejecta. Tcenia saginata is commoner in this country than is tcBiiiasolium, probably owing to the greater care that is given tothe cooking of pork. Bothriocephalus latus, a large, long cestode found morecommonly in those whose diet is composed of fresh fish. Itis said to be common in the Baltic provinces and in parts ofSwitzerland. In its larval form it is often encountered in theabdominal cavity of the pike, its intermediate host, into whichthe embryos are believed to have penetrated from without. The adult worm is long, measuring from 8 to 9 meters; isthin at its edges, with a central longitudinal ridge; and maybe composed of as many as 3000 to 3500 segments. Its head,about 2 mm. ( inch) long, is more or less conical; is with-out hooklets ; and is marked on either side by a longitudinallygrooved sucker (Fig. 36 B). The embiyo is ciliated, is pro- DISEASES DUE TO ANIMAL PARASITES. 239. Fig. 36.—A, Tasnia echinococcus , B, head of bothriocephalus latus (afterLeuckart). vided with booklets, and is able to support itself in water formore than a week. Feeding experiments upon man, cats, and dogs with the Man Fish(Young,sexuallyundifferentiatedBothr.)
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Keywords: ., bookcentury1800, bookdecade1890, booksubject, booksubjectdiseases
