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Article type: Cover
2000 Volume 51 Issue 2 Pages
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Article type: Cover
2000 Volume 51 Issue 2 Pages
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Article type: Appendix
2000 Volume 51 Issue 2 Pages
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Tsutomu TANIKAWA, Yoshihiro IWAKI, Yasushi KAWAKAMI, Yoshihiko MURATA, ...
Article type: Article
2000 Volume 51 Issue 2 Pages
95-100
Published: June 15, 2000
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Resistance level to warfarin was evaluated among 11 colonies of brown rats, Rattus norvegicus, collected in Tokyo (Shinjuku and Hino), Kanagawa (Sagamihara, Yokohama and Kawasaki), Chiba (Chiba and Funabashi), Ibaraki (Kashima), Aichi (Nagoya), Osaka (Osaka) and No. 2-Kaiho (the 2nd fortress islet) on Tokyo Bay, and three strains of laboratory rats (Wistar, SD and F344). Flour-type baits containing 0.005% (w/w) warfarin were given to them for six days. The average lethal days and dose (a. i.) in brown rats were 7.0 days and 20.0mg/kg in the Shinjuku colony; 7.3 days and 9.5mg/kg in the Hino colony; 6.1 days and 13.5mg/kg in the Sagamihara colony; 8.6 days and 17.5mg/kg in the Yokohama colony; 4.0 days and 12.5mg/kg in the Kawasaki colony; 6.4 days and 13.0mg/kg in the Chiba colony; 6.8 days and 11.5mg/kg in the Funabashi colony; 6.3 days and 19.5mg/kg in the Kashima colony; 6.4 days and 11.5mg/kg in the Nagoya colony; 6.1 days and 12.0mg/kg in the Osaka colony; 5.6 days and 16.5mg/kg in the No. 2-Kaiho colony, with the average of 6.4 days and 13.0mg/kg, respectively. With regard to the laboratory rats, the average lethal days and dose were 6.3 days and 14.0mg/kg in the Wistar strain; 6.3 days and 17.5mg/kg in the SD strain; 6.1 days and 17.5mg/kg in the F344 strain, respectively. One rat survived the complete experimental period of 1 month in the Funabashi, Nagoya and No.2-Kaiho Island colonies. If the lethal day was used for the determination of resistance according to the recommended WHO guidelines, these colonies were judged as resistant to warfarin. However, the mortality rate of the rat populations within 12 days indicated no resistance to warfarin in these colonies. As a result of the present survey, it is suggested that use of 12 days as the lethal day be newly proposed for the determination of resistance to warfarin.
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Kenji MIYAMOTO, Katsumi SAITO, Yutaka HATORI, Naoko INOMATA, Yasuhide ...
Article type: Article
2000 Volume 51 Issue 2 Pages
101-104
Published: June 15, 2000
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We report here three Japanese patients who suffered tick bites while travelling overseas : a female Ixodes holocyclus in Sydney, Australia, a nymph Dermacentor sp. in Malaysia and a female Dermacentor andersoni in New Hampshire, U. S. A. No infectious illness was observed in the three patients (two males and one female) after the ticks were removed.
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Kazuyoshi FUJIMOTO
Article type: Article
2000 Volume 51 Issue 2 Pages
105-107
Published: June 15, 2000
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The feeding activity of Haemaphysalis longicornis nymphs that were reared at 24℃ under a 16L-8D photoperiod from egg to engorged larva and then placed outdoors was observed under laboratory conditions (24℃, 16L-8D). The rate of engorgement of the nymphs fed on rabbits was high in October (about one month after molting) but decreased from November (about two months after molting). The rate of engorgement of the nymphs that were reared in the laboratory (24℃, 16L-8D) from egg to unfed nymph was high from October through December. These results suggest that behavioural diapause, which is induced by the short days of autumn, occurs in H. longicornis nymphs that have been placed outdoors. However, the rate of engorgement of the nymphs was more than 20% even in December. Thus, the proportion of the nymphs which enter diapause in autumn appears to be low.
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Article type: Appendix
2000 Volume 51 Issue 2 Pages
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Article type: Appendix
2000 Volume 51 Issue 2 Pages
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Ikuo Takashima
Article type: Article
2000 Volume 51 Issue 2 Pages
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N. Agui
Article type: Article
2000 Volume 51 Issue 2 Pages
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Masashi Ueno
Article type: Article
2000 Volume 51 Issue 2 Pages
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Kenji Miyamoto, Yoshio Hashimoto
Article type: Article
2000 Volume 51 Issue 2 Pages
111-
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S. Sorimachi
Article type: Article
2000 Volume 51 Issue 2 Pages
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Yasuhisa OSAFUNE
Article type: Article
2000 Volume 51 Issue 2 Pages
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Nobuo Yamashita
Article type: Article
2000 Volume 51 Issue 2 Pages
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Yuriko Watanabe, Hiromi Fujita, Hiroaki Noda
Article type: Article
2000 Volume 51 Issue 2 Pages
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Takuya Ito, Kenichi Takahashi, Ikuo Takashima
Article type: Article
2000 Volume 51 Issue 2 Pages
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Hiromi Fujita, Masahide Mikawa
Article type: Article
2000 Volume 51 Issue 2 Pages
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Kohji Uraguchi, Keninchi Takahashi
Article type: Article
2000 Volume 51 Issue 2 Pages
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K. Takahashi, K. Uraguchi, T. Ito
Article type: Article
2000 Volume 51 Issue 2 Pages
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Article type: Appendix
2000 Volume 51 Issue 2 Pages
115-116
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Article type: Appendix
2000 Volume 51 Issue 2 Pages
117-118
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Takashi Tsunoda, Masato Fujimagari
Article type: Article
2000 Volume 51 Issue 2 Pages
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R. Asai, T. Yabe, Y. Takagi
Article type: Article
2000 Volume 51 Issue 2 Pages
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N. Ohtaki
Article type: Article
2000 Volume 51 Issue 2 Pages
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K. Hata, T. Kurihara
Article type: Article
2000 Volume 51 Issue 2 Pages
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S. Hashimoto, M. Koyama, S. Tani, K. Kaneko, I. Inoue, S. Ui
Article type: Article
2000 Volume 51 Issue 2 Pages
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A. Kanayama, K. Kosone
Article type: Article
2000 Volume 51 Issue 2 Pages
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M. Motoki, T. Takamasu, R. Doi
Article type: Article
2000 Volume 51 Issue 2 Pages
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K. Noguchi, K. Yamasita, M. Takaoka
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2000 Volume 51 Issue 2 Pages
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K. Nomura, C. Kokawa, M. Takaoka, K. Matsumoto
Article type: Article
2000 Volume 51 Issue 2 Pages
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A. Moribayashi, H. Kurahashi, N. Agui
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2000 Volume 51 Issue 2 Pages
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R. Kano, Ta Huy Thinh, H. Kurahashi
Article type: Article
2000 Volume 51 Issue 2 Pages
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Satoshi Shinonaga, Chuntian Zhang
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2000 Volume 51 Issue 2 Pages
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Y. Shirai, K. Kamimura, T. Seki, M. Morohashi
Article type: Article
2000 Volume 51 Issue 2 Pages
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M. Kobayashi, T. Sasaki, N. Saito, N. Agui
Article type: Article
2000 Volume 51 Issue 2 Pages
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Katsumi Saito, Akihiro Kanayama
Article type: Article
2000 Volume 51 Issue 2 Pages
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K. Fujimoto
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2000 Volume 51 Issue 2 Pages
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M. TAKAHASHI, Y. KONO, Y. TANAKA
Article type: Article
2000 Volume 51 Issue 2 Pages
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Article type: Appendix
2000 Volume 51 Issue 2 Pages
125-126
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Article type: Appendix
2000 Volume 51 Issue 2 Pages
127-128
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S. Kondo, A. Sugiyama, H. Yamada
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2000 Volume 51 Issue 2 Pages
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Chiharu SUTO
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2000 Volume 51 Issue 2 Pages
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Mamoru Watanabe
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2000 Volume 51 Issue 2 Pages
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K. Kamimura, H. Takahashi, J. Komukai
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2000 Volume 51 Issue 2 Pages
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I. T. Matsuse, Purusotam Basnet, K. Kamimura
Article type: Article
2000 Volume 51 Issue 2 Pages
130-
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Ken Miura, Yasuo Chinzei
Article type: Article
2000 Volume 51 Issue 2 Pages
130-
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Haruhiko Isawa, Masao Yuda, Ken Miura, Katsuhiko Ando, Yasuo Chinzei
Article type: Article
2000 Volume 51 Issue 2 Pages
130-
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H. Ishak, K. Kamimura, T. Takegami, Y. Shirai
Article type: Article
2000 Volume 51 Issue 2 Pages
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Hiroshi Yamanishi
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2000 Volume 51 Issue 2 Pages
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