著者

ODA TSUTOMU SUGENAGA OSAMU ZAITSU MAKOTO MORI AKIO KUROKAWA KENJI FUJITA KOICHIRO OGAWA YASUNORI YAMAZAKI ICHIRO IIDA KUNIHIRO DOI KOUICHI MINE MARIKO KATO KATSUTOMO

出版者

日本熱帯医学会

雑誌

日本熱帯医学会雑誌 (ISSN:03042146)

巻号頁・発行日

vol.23, no.2, pp.133-137, 1995-06-25

参考文献数

7

被引用文献数

3

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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 plpiens 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.