多包虫感染に対するゴールデンハムスターの感受性について

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  • Susceptibility of Golden Hamsters to Infection with Larval Echinococcus multilocularis
  • タホウチュウ カンセン ニ タイスル ゴールデンハムスター ノ カンジュセイ ニ ツイテ

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The author investigated the susceptibility of golden hamsters (Mesocricetus auratus Waterhouse) to infection with larval Echinococcus multilocularis Leuckart, 1863 by the oral inoculation of embryophores and by the intraperitoneal inoculation of protoscolices. The results obtained are as follows. 1. Nine out of 13 male and 15 out of 19 female golden hamsters were infected with the larval cestode by the oral inoculation. The resulting echinococcal foci showed an appearance of the nodule formation derived from the organization of dead larvae. Multilocular hydatid cysts, however, were recognized in two of seven cases 60 days after the inoculation. 2. All the animals, twelve male and nine female hamsters, were infected with larvae by the intraperitoneal inoculation. Initial brood capsules, a few mature protoscolices, and fully-developed cysts with many protoscolices were recognized 30, 60, and 100 days after the inoculation, respectively. In the central area of the focus, however, degenerated protoscolices could already be found in the 100-day cases. Fully-developed cysts could still be recognized 8 months after the inoculation. By that time many protoscolices had degenerated, and the calcification and cholesterin deposition had occurred in the necrotic area of the adventitial layer. Contrary to the results of experiments in the past, it can be concluded that multilocular cysts manifest rather progressed development in the golden hamster oraly inoculated with embryophores, and that this animal is highly susceptible to infection when intraperitoneally inocuIated with protoscolices.

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