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Protective Efficacy of a Commercial β-hemolytic <i>Streptococcus</i> Vaccine for Japanese Flounder against <i>Streptococcus iniae</i> Infection of Threadsail Filefish

  • Ishii Yuji
    Graduate School of Fisheries Science and Environmental Studies, Nagasaki University
  • Yamada Toshiyuki
    Nagasaki Prefectural Institute of Fisheries
  • Sugihara Yukitaka
    Nagasaki Prefectural Institute of Fisheries
  • Takami Ikuo
    Tsushima Fisheries Expansion Advisory Center
  • Suga Koushirou
    Graduate School of Fisheries Science and Environmental Studies, Nagasaki University
  • Kanai Kinya
    Graduate School of Fisheries Science and Environmental Studies, Nagasaki University

Bibliographic Information

Other Title
  • カワハギのβ溶血性レンサ球菌症に対する市販ヒラメ用ワクチンの有効性
  • カワハギ ノ vヨウケツセイ レンサ キュウキンショウ ニ タイスル シハン ヒラメヨウ ワクチン ノ ユウコウセイ

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Abstract

A commercial β-hemolytic Streptococcus vaccine for Japanese flounder was examined for the protective efficacy against Streptococcus iniae infection of threadsail filefish Stephanolepis cirrhifer. In the artificial infection test a high mortality rate (90%) was obtained by intramuscular inoculation with S. iniae as low as 102 CFU/100 g body weight. In the vaccination test intraperitoneal inoculation with the vaccine at the usual and 1/10 dosages resulted in a high protective effect (RPS≥85%), and the high protective efficacy was kept for at least 7 months.

Journal

  • Fish Pathology

    Fish Pathology 48 (1), 29-31, 2013

    The Japanese Society of Fish Pathology

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