STUDIES ON ANNUAL CHANGES IN MICROFILARIAL PREVALENCE OF DIROFILARIA IMMITIS AMONG HOUSE DOGS FOR 27 YEARS IN NAGASAKI CITY, JAPAN

  • ODA TSUTOMU
    Department of General Education, The School of Allied Medical Sciences, Nagasaki University
  • SUENAGA OSAMU
    Reference Center, Institute of Tropical Medicine, Nagasaki University
  • ZAITSU MAKOTO
    Sasebo City Health Center
  • MORI AKIO
    Department of Medical Zoology, Nagasaki University School of Medicine
  • UROKAWA KENJI
    Department of Bacteriology, Nagasaki University School of Medicine
  • FUJITA KOICHIRO
    Department of Medical Zoology, Faculty of Medicine, Tokyo Medical and Dental University
  • OGAWA YASUNORI
    Department of Medical Zoology, Faculty of Medicine, Tokyo Medical and Dental University
  • YAMAZAKI ICHIRO
    Nagasaki City Health Center
  • IIDA KUNIHIRO
    Nagasaki City Health Center
  • DOI KOUICHI
    Nagasaki City Health Center
  • MINE MARIKO
    Scientific Data Center of Atomic Bomb Disaster, Nagasaki University School of Medicine
  • KATO KATSUTOMO
    Department of Physical Therapy, The School of Allied Medical Sciences, Nagasaki University

書誌事項

タイトル別名
  • Studies on Annual Changes in Microfilarial Prevalence of Dirofilaria immits among House Dogs for 27 years in Nagasaki City, Japan.
  • 長崎市における飼い犬の犬糸状虫の仔虫保有率の27年間の年次的変化に関する研究〔英文〕
  • ナガサキシ ニ オケル カイイヌ ノ イヌ シジョウチュウ ノ シチュウ ホユ

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抄録

The positive rate of dogs with Dirofilaria immitis microfilariae among house dogs was examined for 27 years from 1968 to 1994 in the southern and northern parts of Nagasaki City. Roles of the number of the main vector, Culex pipiens pallens and of RPSS (rate of population utilizing a sewage system) were analyzed statistically in relation to the annual changes in microfilarial prevalence. In the southern and northern parts, there was a clear correlation among three parameters of the positive rate in the dogs, the number of Cx. p. pallens and RPSS. The present study proved that the decrease in the positive rate of dogs in both the southern and northern parts is mainly attributable to a decrease in the number of Cx. p. pallens, which resulted from the decrease of the breeding places of this mosquito following the spread of the public sewage system and the improvements in the use of roads and open roadside ditches.

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