Journal of Marine Life Science (한국해양생명과학회지)

The Korean Society of Marine Life Science (한국해양생명과학회)
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About Streptococcosis of Cultured Olive Flounder, Paralichthys olivaceus in South Korea

국내 양식 넙치에서 발생하는 연쇄구균병에 관하여

  • Lee, Nam-Sil (Pathology Division, National Institute of Fisheries Sciences) ;
  • Min, Eunyoung (Pathology Division, National Institute of Fisheries Sciences) ;
  • Kim, Kwang Il (Department of Aquatic life medicine, Pukyong National University) ;
  • Choi, Hye Sung (Pathology Division, National Institute of Fisheries Sciences) ;
  • Jung, Sung-hee (Aquaculture Management Division, National Institute of Fisheries Sciences) ;
  • Cho, Miyoung (Pathology Division, National Institute of Fisheries Sciences)
  • 이남실 (국립수산과학원 병리연구과) ;
  • 민은영 (국립수산과학원 병리연구과) ;
  • 김광일 (부경대학교 수산생명의학과) ;
  • 최혜승 (국립수산과학원 병리연구과) ;
  • 정승희 (국립수산과학원 양식관리과) ;
  • 조미영 (국립수산과학원 병리연구과)
  • Received : 2020.03.27
  • Accepted : 2020.06.08
  • Published : 2020.06.16
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Abstract

This review is about current Streptococcosis of cultured olive flounder, Paralichthys olivaceus, in South Korea. The main bacterial species are Streptococcus iniae, S. parauberis and Lactococcus garvieae. The occurrence trend has been arranged with published data and seed bank (NIFS) data that was examined with deposited strains and the number from 2002 to 2017. S. iniae and L. garvieae were collected until 2012 and 2002, respectively, but not collected any more after that year. In recent years, the dominant strain of Streptococcosis of cultured olive flounder is S. parauberis. The phenotypic and genetic characteristics of standard strains and isolated strains were examined with published paper. Notably, we describe about distinguishing gross signs and histological signs of 3 types of Streptococcosis in this report. White turbidity of eye, hemorrhage, enteritis and ascites are main signs of S. iniae infection. Darkness of body surface, hemorrhage in somatic muscle and pericarditis are predominant in occasion S. parauberis infection. In occasion of L. garvieae infection, common signs of Streptococcosis are revealed, but these are weak tendency compared with the previous two cases.

본 내용은 최근 국내 양식 넙치에서 발생하는 연쇄구균병에 관하여 정리한 내용으로, 주요 균종은 Streptococcus iniae, S. parauberis 그리고 Lactococcus garvieae이다. 최근 발생경향은 지금까지 보고된 내용과 2002년에서 2017년 사이에 국립수산과학원 균주은행의 기탁균주에 대한 정보를 기초자료로 검토하였다. S. iniae와 L. garvieae는 계속 검출빈도가 줄어들었고, 균주은행 기탁균주의 경우에도 두 균주 각각 2012년과 2002년 이후로 기탁 건수가 없었다. 최근 양식 넙치에서 우점적으로 분리되는 연쇄구균병의 원인세균은 S. parauberis이다. 또한 육안적 증상과 병리조직학적 변화를 함께 비교·검토하였는데, S. iniae 감염에서는 안구백탁, 출혈, 장염 그리고 복수저류가, S. parauberis 감염에서는 체색흑화, 심외막염이 주요증상이다. L. garvieae 감염은 연쇄구균병에서 나타나는 증상이 공통적으로 나타나지만, 독성은 다른 두 종의 증상과 비교하여 약한 것으로 판단되었다. 병리조직학적 증상은 급성인지 만성인지에 따라 내부 장기별로 변성진행에 차이를 나타내지만 육안적으로 관찰되는 주요증상이 조직학적 소견에 반영된다.

Keywords

Acknowledgement

본 review는 국립수산과학원「수산질병특성연구 (R2020057)」에 의해 수행되었습니다.

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