Journal of fish pathology (한국어병학회지)

The Korean Society of Fish Pathology (한국어병학회)
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Characterization of Streptococcus parauberis isolated from cultured Olive flounder, Paralichthys olivaceus in the Jeju Island

제주도 양식넙치 (Paralichthys olivaceus)로부터 분리한 비 용혈성 연쇄구균의 동정

  • Published : 2007.08.30
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Abstract

This study was performed to identity non hemolytic streptococcus from cultured flounder (Paralichthys olivaceus) with Streptococcosis in the Jeju island. The result of BIOLOGTM test was Streptococcus uberis that simility of 0.5 and 98% identified in MicroLogTM system (Release 4.05). Carbohydrate utility pattern was dextrin, N-acetyl-D-glucosamine, arbutin, maltose, maltotriose, D-cellobiose, D-fructose, D-mannose, α-D-glucose, D-mannitol, β-methyl D-glucoside, salicin, sucrose, D-trehalose, pruvatic acid methyl ester, mono-methyl succinate, glycerol. In addition hemolysis test for S. parauberis and were S. iniae hemolysis in BAP (Blood agar plate). Antibiotic test for S. parauberis were Ampicillin, Amoxicillin and Fluoroquinolone sensitivity. Mutiplex PCR assay were detected S. pauberis (718 bp), S. iniae (870 bp) L. garviae (1,100 bp). Dectected S. parauberis (718 bp) were result of 16S rRNA sequence identified with S. parauberis (Gene bank accession number X89967). All isolated S. parauberis that with bouned by one group. The result were S. pauberis that γ-hemolytic chain form cocci and negative reaction of catalase, Multiplex PCR assay were 718 bp amplicon size.

본 연구에서는 국내 연구보고는 아직 없는 실정이나 양식터봇의 연쇄구균 병원체로 보고 된 바가 있는 제주 양식넙치에서 분리되는 γ 용혈성의 연쇄구균인 Streptococcus parauberis의 특성을 제시하고자 하였다. S. parauberis에 대한 분리균주의 탄소원을 기질로 이용하는 특성은 Annette and Collllins (1990)가 보고한 결과와 유사하였다.또한 분리된 균주들을 계통분류학적 분석 결과 Accesion number AY584477 하나의 그룹으로 묶였지만 S. iniae와는 다른 그룹으로 묶였다. 그러나 Collins가 Streptococcus iniae (X58306)와 S. parauberis (X89967)이 한 그룹으로 묶인다고 발표한 것과는 다른 결과를 나타냈다. 16S rRNA gene에 대한 염기서열 분석 결과는 S. parauberis (AY942572)와 98%이상의 상동성을 나타내어 S. parauberis로 동정하였다. S. parauberis는 S. uberis type Ⅱ로 분류되었으나 Williams and Collins (1990)에 의해서 S. parauberis라는 종명이 제시되었다. 이러한 결과로 볼 때 제주도 양식넙치의 연쇄구균증 병원체로 S. parauberis로 판단되나 이번 실험에서 감염실험이 수행되지 않아 앞으로 본 병원체에 대한 감염 실험과 병리학적인 연구가 필요하다고 사료되어진다.

Keywords

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