Pathological activities of the naturally occurring strains of Edwardseilla tarda.

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  • ULLAH Arshad
    Department of Microbiology, School of Medicine, Keio University
  • ARAI Toshihiko
    Department of Microbiology, School of Medicine, Keio University

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  • 病魚分離Edwardsiella tarda株の病原活性
  • 病魚分離Edwardsiella tarda株の病原活性〔英文〕
  • ビョウギョ ブンリ Edwardsiella tarda カブ ノ ビョウゲン

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Abstract

Pathological activities of Edwardsiella tarda strains were studied. Adhesive or invasive activity was first examined. But we failed to detect any specific adhesive pili or invasive function. These strains were found to have slimes. These slimes could include adhesins as well as the protective substances against host defence systems.<BR>These strains were found to produce hemolysins but not to produce Escherichia coli-like enterotoxin, proteolytic enzymes and phospholipases. But different from these functionally defined toxic substances, we found that all E. tarda strains were producing the functionally different two dermatotoxins. These toxins could be the major exotoxins of E. tarda responsible for its pathogenicity.

Journal

  • Fish Pathology

    Fish Pathology 18 (2), 65-70, 1983

    The Japanese Society of Fish Pathology

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