Journal of Environmental Health Sciences (한국환경보건학회지)

Korean Society of Environmental Health (한국환경보건학회)
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A Study of Antimicrobial Resistance in Escherichia coli and the Distribution of Indicator Microorganisms in Asan City

아산시 지표미생물의 분포와 Escherichia coli의 항생제 내성에 관한 연구

  • Lee, Geun-Yeol (Department of Environmental Engineering, Hoseo University) ;
  • Kim, Keun-Ha (Department of Environmental Engineering, Hoseo University) ;
  • Kwon, Mun-Ju (Department of Environmental Engineering, Hoseo University) ;
  • Kwon, Hyuk-Ku (Institute of Fusion Technology, Hoseo University) ;
  • Kim, Yeon-Hee (Department of Safety Health Engineering, Hoseo University) ;
  • Lee, Jang-Hoon (Department of Environmental Engineering, Hoseo University)
  • 이근열 (호서대학교 환경공학과) ;
  • 김근하 (호서대학교 환경공학과) ;
  • 권문주 (호서대학교 환경공학과) ;
  • 권혁구 (호서대학교 융합기술연구소) ;
  • 김연희 (호서대학교 안전보건학과) ;
  • 이장훈 (호서대학교 환경공학과)
  • Received : 2010.03.27
  • Accepted : 2010.06.20
  • Published : 2010.06.30
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Abstract

Efforts to evaluate water pollution using indicator microorganisms have been underway for decades, and driven by research on water purity control applications, water quality criteria are growing more and more strict. Furthermore, recent reports indicate that high concentrations of antibiotics are not absorbed, and are present in excrement from animals and humans dosed with unnecessarily high levels of antibiotics. This has emerged as very important issue from the standpoint of being an ecological and health hazard. In this study, water pollution was analyzed through physicochemical and microbiological means, and antibiotic resistance in indicator microorganisms was assessed. In physicochemical analysis, biochemical oxygen demand (BOD)$_5$ and chemical oxygen demand (COD)$_{Mn}$ evaluation showed that pollution by organisms was highest at the G1 location with a high human population, and the DP location which has many livestock-containing households. The indicator organism levels at the G1 location were: Total Coliforms (1205 colony forming units (CFU)/100 ml), Fecal Coliforms (270 CFU/100 ml), Escherichia coli (253 CFU/100 ml) and Fecal Streptococci (210 CFU/100 ml), while for the DP location levels were: Total Coliforms (1480 CFU/100 ml), Fecal Coliforms (438 CFU/100 ml), E. coli (560 CFU/100 ml), and Fecal Streptococci (348 CFU/100 ml). Levels of fecal indicator microorganisms such as Fecal Coliforms, E. coli and Fecal Streptococci were high at all locations in the fall (the period after the rainy season), and the yearly distribution was similar between these organisms. If the number of livestock-containing households was high, almost all strains of E. coli (as distinct from the other indicator organisms) showed resistance to antibiotics, with the degree of resistance varying between areas. E. coli strains from the OY area in particular, which has a high population density, showed strong resistance to AM10 and Va30. While strong antibiotic resistance was observed overall at the DP and OY locations, no resistance was observed at the EB location.

Keywords

References

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