Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Microbiological Quality of the Shellfish-growing Waters and Mussels in Changseon, Namhae, Korea

남해 창선해역의 해수 및 진주담치의 위생학적 안전성 평가

  • Yoo, Hyun-Duk (Southeast Sea Fisheries Research Institute, National Fisheries Research and Development Institute) ;
  • Ha, Kwang-Soo (Southeast Sea Fisheries Research Institute, National Fisheries Research and Development Institute) ;
  • Shim, Kil-Bo (Southeast Sea Fisheries Research Institute, National Fisheries Research and Development Institute) ;
  • Kang, Jin Yeong (Southeast Sea Fisheries Research Institute, National Fisheries Research and Development Institute) ;
  • Lee, Tae-Seek (Southeast Sea Fisheries Research Institute, National Fisheries Research and Development Institute) ;
  • Kim, Ji-Hoe (Southeast Sea Fisheries Research Institute, National Fisheries Research and Development Institute)
  • 유현덕 (국립수산과학원 남동해수산연구소) ;
  • 하광수 (국립수산과학원 남동해수산연구소) ;
  • 심길보 (국립수산과학원 남동해수산연구소) ;
  • 강진영 (국립수산과학원 남동해수산연구소) ;
  • 이태식 (국립수산과학원 남동해수산연구소) ;
  • 김지회 (국립수산과학원 남동해수산연구소)
  • Received : 2010.01.30
  • Accepted : 2010.08.13
  • Published : 2010.08.31
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Abstract

A sanitary survey was conducted to evaluate the water quality and mussel (Mytilus edulis) conditions of two administrative shellfish growing waters: those designated as shellfish growing water for export, and adjacent waters on the east coast of Changseon Island, Namhae, Korea. In all, 1,656 seawater and 166 mussel samples were collected at 46 stations for seawater and five stations for the shellfish from January 2007 to December 2009. Both seawater and mussels were examined for total coliforms and fecal coliforms. The standard plate count and most probable number of Escherichia coli were also determined for the shellfish samples. The range of the geometric means and the estimated 90th percentiles of fecal coliform for seawater samples at each station were <1.8-4.1 MPN/100 mL and <1.8-22.3 MPN/100 mL, respectively. The sanitary conditions for both shellfish growing areas, the designated shellfish growing area and adjacent area in Changseon, met the 'Approved area' criteria of the United States National Shellfish Sanitation Program. The range of E. coli detected in mussels in these areas was <20-500 MPN/100 g; and only 3 of 166 samples exceeded 230 MPN/100 g, the European standard for the consumption of raw bivalves. Therefore, the mussel farms in the Changseon area are classified as 'Class A' according to criteria set in European Community regulations. However, the levels of E. coli in mussels in parts of the designated shellfish growing area and adjacent area exceeded the bacterial limits after rainfall exceeding 45 mm. Further studies are needed to fully define the conditions leading to a temporary closure to harvest after a rainfall event.

Keywords

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