Myxosporean Emaciation Disease of Cultured Red Sea Bream Pagrus major and Spotted Knifejaw Oplegnathus punctatus

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  • Yanagida Tetsuya
    Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences,The University of Tokyo
  • Palenzuela Oswaldo
    Instituto de Acuicultura de Torre de la Sal (CSIC)
  • Hirae Tatsumu
    Kagoshima Prefectural Fisheries Technology and Development Center
  • Tanaka Shinji
    Mie Prefectural Science and Technology Promotion Center
  • Yokoyama Hiroshi
    Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences,The University of Tokyo
  • Ogawa Kazuo
    Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences,The University of Tokyo

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Abstract

Myxosporean emaciation disease of cultured red sea bream Pagrus major and spotted knifejaw Oplegnathus punctatus has recently occurred in Japan. Morphological features and molecular analysis of SSU rDNA indicated that myxozoans from the intestine of affected fishes were identified as Enteromyxum leei, one of the causative organisms of the emaciation disease of tiger puffer Takifugu rubripes. A one-year periodic examination of E. leei infection in cultured red sea bream revealed that cumulative mortalities reached about 10% during the first summer, but surviving fish were not infected in the following year. Experimental transmission of E. leei from infected tiger puffer to naive red sea bream was achieved by both cohabitation with infected fish and exposure to effluent from a tank containing infected fish. This study suggests that fish-to-fish transmission occurs among different fish species in culture fields.

Journal

  • Fish Pathology

    Fish Pathology 43 (1), 45-48, 2008

    The Japanese Society of Fish Pathology

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