한국수산과학회지 (Korean Journal of Fisheries and Aquatic Sciences)

  • 제36권6호
  • /
  • Pages.654-660
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  • 2003
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  • 0374-8111(pISSN)
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  • 2287-8815(eISSN)
한국수산과학회 (The Korean Society of Fisheries and Aquatic Science)
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넙치 (Paralichthys olivaceus) 병어에서 분리된 연쇄상구균의 다양성

Diversity of the Streptococcal Strains Isolated from Diseased Olive Flounder (Paralichthys olivaceus)

  • 김종훈 (여수대학교 수산생명의학과) ;
  • 김은희 (여수대학교 수산생명의학과)
  • KIM Jong-Hun (Department of Aqualife Medicine, Yosu National University) ;
  • KIM Eunheui (Department of Aqualife Medicine, Yosu National University)
  • 발행 : 2003.12.01
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초록

To evaluate the biological diversity of fish pathogenic streptococci, 35 strains isolated from diseased olive flounder (Paralichtys olivaceus), were analyzed using a random amplified polymorphic DNA (RAPD) technique with the oligonucleotide commercial primer 6 (Amersham Biosciences). Api 20 Strep test, drug resistance and artificial infection were carried out for further characterization of the isolates. RAPD fingerprints showed similar pattern in 25 strains (about $71.4\%$ of 35 isolates) and these strains were designed as RA group 1. Similarities greater than $44\%$ were obtained when the Dice coefficient was applied among the isolates of RA 1. On the other hand, the reference Streptococcus iniae showed a similar RAPD profile to the isolates with similarity levels of $40-93.3\%.$ Rh I was suggested to be the dominant group isolated from olive flounder suffering from streptococcosis. However, the isolates of Rh 1 group were not classified into the same species by the Api 20 Strep identification system. There was no peculiarity in drug resistance patterns of Rh I group isolates against 7 antibacterial agents. However, only 3 of 25 isolates $(0.12\%)$ showed oxytetracycline (OTC) resistance and OTC might be a useful chemotherapeutic agent in controlling the streptococcosis by strains of RA I group in olive flounder. Fish injected intraperitoneally with $10^5$ CFU of an isolate of Rh I and RA III group showed $60\%\;and\;50\%$ accumulative mortality for 20 days, respectively ($20\%$ in control or Rh II). However luther comparative studies about differences in virulence between isolates are needed.

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참고문헌

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피인용 문헌

  1. Genome based quantification of Streptococcus parauberis in multiple organs of infected olive flounder (Paralichthys olivaceus) vol.39, pp.8, 2003, https://doi.org/10.1007/s13258-017-0553-4