Dry-ice trap and human bait collection of mosquitoes in the eastern part of Hokkaido, Japan

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  • HIGA Yukiko
    Department of Medical Entomology, National Institute of Infectious Diseases:Center of International Collaborative Research, Nagasaki University
  • HOSHINO Keita
    Department of Medical Entomology, National Institute of Infectious Diseases
  • TSUDA Yoshio
    Department of Medical Entomology, National Institute of Infectious Diseases
  • KOBAYASHI Mutsuo
    Department of Medical Entomology, National Institute of Infectious Diseases

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  • 北海道東部におけるドライアイストラップと人囮法による蚊の採集結果

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Abstract

Host-seeking mosquitoes were collected by CDC-type traps enhanced with 1kg of dry-ice and human bait collection in August 2003 and August 2004 at 6 localities along the coastal region of the eastern part of Hokkaido, Japan. A total of 10 species in 5 genera was encountered, and Culex pipiens s.l. and subarctic aedine mosquitoes were abundant. The mosquito fauna was compared between localities and among collection sites with different vegetation type. The species composition of mosquito samples differed greatly between localities. There was a clear relationship between species composition and vegetation type in Kushiro, suggesting a species-specific habitat selection among the 4 dominant species; Cx. pipiens s. l., Aedes esoensis, Culiseta nipponica and Ae. yamadai. The potential vectors of the West Nile virus in the eastern part of Hokkaido, Japan, were discussed based on the results of our mosquito collections.

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