Korean Journal of Microbiology (미생물학회지)

The Microbiological Society of Korea (한국미생물학회)
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Distribution and Characteristics of Coliform Bacteria in Groundwater of Yeungnam Province

영남지역 지하수에서 대장균군의 분포 및 분리한 세균의 특성

  • Lee In-Hwan (Graduate School of Education, University of Ulsan) ;
  • Kim Soo-Kyung (Graduate School of Education, University of Ulsan) ;
  • Choi Yun-Hee (Graduate School of Education, University of Ulsan) ;
  • Kim Jong-Seol (Graduate School of Education, University of Ulsan)
  • 이인환 (울산대학교 교육대학원) ;
  • 김수경 (울산대학교 교육대학원) ;
  • 최윤희 (울산대학교 교육대학원) ;
  • 김종설 (울산대학교 교육대학원)
  • Published : 2006.06.01
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Abstract

To evaluate bacteriological water quality of groundwater in Yeungnam Province, samples were taken from 123 locations during summer and 117 locations during winter. The medians of heterotrophic plate counts.(HPCs) were 30 CFU/mL for the summer samples and 40 CFU/ml for the winter, and more than 25% showed HPCs higher than 100 CFU/ml. Coliform bacteria were detected from 46% of the summer samples and 30% of the winter. In these coliform-positive samples, the medians of coliform counts were 20 CFU/ml for the summer samples and 4 CFU/ml for the winter. Genera such as Citrobacter, Enterobacter, Escherichia, Klebsielia, Pantoea, Rahnellia, and Serratia were identified from the coliform isolates; among them, 48% were members of the genus Enterobacter. While E. cloacae, E. amnigenus, and K. pneumoniae were the most frequently isolated species, E. coli was isolated only from 1 location. The coliform counts were positively correlated with the HPCs, which also positively correlated with water temperature. The results of present study provide further insight on the extent of groundwater contamination with coliform bacteria.

생활용수로 사용하는 영남지역 지하수의 세균학적 수질을 평가하기 위해, 여름 123개 지점, 겨울 117개 지점에서 지하수 시료를 채수하였다. 일반세균 수의 중앙간은 여름 30 CFU/ml, 겨울 40 CFU/ml이었고, 25% 이상의 조사지점에서 일반세균 수는 먹는물 수질기준 100 CFU/ml을 초과하였다. 전체 조사지점 중 여름 46%, 겨울 30%의 지점에서는 대장균군이 검출되었으며, 이들 지점에서 대장균군 수의 중앙간은 여름 20 CFU/ml, 겨울 4 CFU/ml로 여름이 겨울보다 높았다. 분리한 대장균군 세균은 Citrobacter속, Enterobacter속, Eschericitia속, Klebsiella속, Pantoea속, Rahnella속, 그리고 Serratia속으로 동정되었으며, Enterobacter속이 48%를 차지하여 가장 많았다. 종별로는 E. cloacae, E. amnigenus, K. pneumoniae등이 빈도가 높게 분리되었으며, 반면 E. coli는 1개 조사지점에서만 분리되었다. 대장균군 수는 일반세균 수와 양의 상관관계를 보였으며, 일반세균 수는 수온과도 양의 상관관계가 있었다. 본 연구의 결과는 지하수에서 대장균군의 오염에 대한 보다 자세한 정보를 제공해 주며, 영남지역의 지하수에서 병원성 미생물의 오염 가능성이 여전히 높음을 시사한다.

Keywords

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