ケオピスネズミノミ (Xenopsylla cheopis Rothschild) のペスト感染能に関する研究

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書誌事項

タイトル別名
  • STUDIES ON THE INFECTIVE ACTIVITY OF PLAGUE BY XENOPSYLLA CHEOPIS ROTHSCHILD
  • ケオピスネズミノミ

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説明

1) At the temperature and humidity in Fukken Province in early summer, which is the epidemic season in this area, the X. cheopis under starving condition after sucking bloodd from the rat suffering from plague bacillus septicemia :<BR>a. demonstrates the highest of long term bacterial carrier in the body.<BR>b. has a vigorous desire of blood sucking.<BR>c. is markedly and highly infectious to guinea pigs.<BR>2) At the temperature of approximately 30°C, which is the midsummer temperature in this area, a sudden drop in the rate of carriers is noted among those fleas which once became plague bacillus carriers beginning from 3-4 days after starvation, and quite a good number of them lose the inf ectivity.<BR>3) The above described results are considered to be a major factor to the fact that the epidemic of plague in Fukken Province is limitted within the early summer not being extended to the midsummer or later.<BR>4) Among the fleas which had repeatedly sucked the infected blood, a fair number was found acquired the infectivity within 1-2 days.<BR>A deepest appreciation is due to the kind advice given by Dr. Tadayoshi Kasuga of the Kitasato Institute for Infectious Diseases at the time the results of this work were consolidated.

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