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1993 Fiscal Year Final Research Report Summary

Studies on the mechanism of antibody production of carp in a myxosporean infection

Research Project

Project/Area Number 04660197
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field General fisheries
Research InstitutionUniversity of Tokyo

Principal Investigator

OGAWA Kazuo  Univ.of Tokyo, Fac.of Agr., Ass.Prof., 農学部, 助教授 (20092174)

Co-Investigator(Kenkyū-buntansha) IIDA Takaji  Univ.of Miyazaki, Fac.of Agr., Ass.Prof., 農学部, 助教授 (70159557)
Project Period (FY) 1992 – 1993
KeywordsCyprinus carpio / myxosporeans / Myxobolus artus / antibody production / vaccine
Research Abstract

Myxobolus artus formed pseudocysts in the skeletal muscle of carp. Some pseudocysts showed abnormal growth, imperfect encapsulation of the parasite by the host tissue, resulting in rupture of pseudocysts before completion of sporogenesis. After spore formation was complete or atypical pseudocysts ruptured, host reaction was initiated. Spores were phagocytosed and either transported to macrophage centers in the visceral organs or discharged from the host through the skin and intestine.
The antibody which reacted with sonicated spores was detected in some naturally infected carp, while some other fish had no detectable sign of infection though they had the antibody. The antibody was produced in carp injected either with developing stages of the parasite or sonicated spores with bovine serum albumin, but not in carp injected either with intact or sonicated spores. The results of the injection experiments suggest that 1) developing stages have antigenicity to carp and 2) spores have lost it ; sonicated spores are haptens, with which the antibody can react. In an indirect fluorescent antibody technique, sera positive for the antigen reacted with developing stages of the parasite, but not with the spore. It is plausible that the antibody was produced when young pseudocysts, which showed abnormal growth ruptured during development, were exposed to the host immune system. In vaccination trials, carp injected with sonicated spores did not show any immutity agaist M.artus infection.

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] K.Ogawa: "Histological studies on the host response to Myxobolus artus Akhmeras, 1960(Myxazoa:Myxobolidae)infection in the skeletal muscle of carp,Cyprirus carpio L." Journal of Fish Biology. 41. 363-371 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Furuta: "Humoral immune response of carp Cyprius carpio to Myxobolus artus(Myxozoa:Myxobolidae)infection" Journal of Fish Biology. 43. 441-450 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Ogawa, K.P.Delgahapitiya, T.Furuta and H.Wakabayashi: "Histological studies on the host response to Myxobolus artus Akhmerov, 1960 (Myxozoa : Myxobolidae) infection in the skeletal muscle of carp, Cyprinus carpio L." J.Fish Biol.41. 363-371 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Furuta, K.Ogawa and H.Wakabayashi: "Humoral immune response of carp Cyprinus carpio to Myxobolus artus (Myxozoa : Myxobolidae) infection" J.Fish Biol.43. 441-450 (1993)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1995-03-27  

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