単生類Heterobothrium okamotoi感染に対するトラフグの防御能の獲得

DOI Web Site 被引用文献5件 参考文献14件
  • 中根 基行
    Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo
  • 小川 和夫
    Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo
  • 藤田 忠勝
    Kumamoto Prefectural Fisheries Research Center
  • 鮫島 守
    Kumamoto Prefectural Fisheries Research Center
  • 若林 久嗣
    Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo

書誌事項

タイトル別名
  • Acquired Protection of Tiger Puffer Takifugu rubripes against Infection with Heterobothrium okamotoi (Monogenea: Diclidophoridae)

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抄録

Two-year-old tiger puffer Takifugu rubripes, persistently infected with the monogenean Heterobothrium okamotoi for longer than one year, were cohabitated in an aquarium with one-year-old tigerpuffer with no previous record of infection (naïve fish) for 70 days. The infection level in the naïve fish rose sharply, and the intensity of infection reached its highest on day 30 (estimated 16, 700 parasites on the gills per fish). In the persistently infected fish, on the other hand, no change was recorded in the infection level, which was much lower than that of the naïve fish. Based on the compositions of parasite developmental stages in the two fish groups, we hypothesize that the protection mechanism found among the persistently infected fish functioned in at least three occasions : firstly when the oncomiracidium settled on the gills, secondly when the parasite developed from a worm without clamps to one with a pair of clamps, and thirdly when it migrated and grew on the branchial cavity wall. The persistently infected fish produced anti-Heterobothrium antibodies, while no antibody was detected in the naïve fish. These results suggest that a persistent infection induces protection against H. okamotoi, but the factors responsible for effective prevention against reinfection remain to be clarified.

収録刊行物

  • 魚病研究

    魚病研究 40 (3), 95-101, 2005

    日本魚病学会

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