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Monitoring of Selected Veterinary Antibiotics in Animal Carcass Disposal Site and Adjacent Agricultural Soil

가축매몰지 및 인근 농경지의 축산용 잔류 항생제 모니터링

  • Lim, Jung Eun (Korea Biochar Research Center & Department of Biological Environment, Kangwon National University) ;
  • Rajapaksha, Anushka Upamali (Korea Biochar Research Center & Department of Biological Environment, Kangwon National University) ;
  • Jeong, Se Hee (Korea Biochar Research Center & Department of Biological Environment, Kangwon National University) ;
  • Kim, Sung Chul (Department of Bio Environmental Chemistry, Chungnam National University) ;
  • Kim, Kye Hoon (Department of Environmental Horticulture, The University of Seoul) ;
  • Lee, Sang Soo (Korea Biochar Research Center & Department of Biological Environment, Kangwon National University) ;
  • Ok, Yong Sik (Korea Biochar Research Center & Department of Biological Environment, Kangwon National University)
  • Received : 2013.10.20
  • Accepted : 2013.12.23
  • Published : 2014.09.30

Abstract

In Korea, over 4,700 animal carcass disposal sites were installed until 2011 due to the outbreak of foot and mouth disease. Due to the putrefaction of buried animals, the leachate containing veterinary antibiotics may release into surrounding environments. Antibiotic residues in the environment cause the formation of antibiotic resistance bacteria threatening human and ecosystem health. This study reports the concentrations of five antibiotics, including tetracycline (TC), chlortetracycline (CTC), oxytetracycline (OTC), sulfamethazine (SMZ), and sulfamethoxazole (SMX), in soils from animal carcass disposal site and adjacent agricultural field. Concentrations of antibiotics at animal carcass disposal sites (TC: $144.26-350.73{\mu}g/kg$, SMZ: $17.72-44.94{\mu}g/kg$) were higher than those at agricultural field (TC: $134.16-320.73{\mu}g/kg$, SMZ: $6.48-8.85{\mu}g/kg$) whereas the concentrations of CTC, OTC, and SMX were below detection limit in both sites. Results showed that the antibiotics in animal carcass site might leach to the soil and possibly contaminating the groundwater. Future studies will focus on the transfer of antibiotics residues into food crops.

2010년 발생한 가축전염병인 구제역(FMD)으로 인해 전국에 약 4,700여개소에 가축 매몰지가 조성되었다. 매몰된 가축의 부패 과정에서 발생하는 침출수는 항생제와 같은 다양한 오염물질들을 함유하고 있어 주변 토양 및 수계로 유입되는 경우 환경에 악영향을 초래할 수 있다. 이와 같이 환경에 잔류하는 항생제는 내성박테리아 생성 등을 통해 인간건강 및 생태계 건전성을 위협할 수 있다. 이에 본 연구에서는 가축 매몰에 의한 항생제 오염수준을 평가하기 위해 가축 매몰지 및 인근 농경지 토양에서 항생제 모니터링을 실시하였다. 모니터링 대상 항생제로는 축산용 항생제로 사용량이 가장 많은 tetracycline 계열의 tetracycline (TC), chlortetracycline (CTC), oxytetracycline (OTC)와 sulfonamide 계열의 sulfamethazine (SMZ), sulfamethoxazole (SMX)을 선정하였다. 항생제의 잔류농도는 매몰지 (TC: $144.26-350.73{\mu}g/kg$, SMZ: $17.72-44.94{\mu}g/kg$)가 인근 농경지 (TC: $134.16-320.73{\mu}g/kg$, SMZ: $6.48-8.85{\mu}g/kg$)에 비해 높은 것으로 나타났으며 CTC, OTC, SMX는 검출되지 않았다. 연구결과를 통해 단정할 수는 없으나 매몰된 가축사체에 함유된 항생제가 매몰지 및 인근 토양에 축적될 수 있는 개연성이 있는 것으로 판단되었다. 특히, 농경지에 잔류하는 항생제는 농작물에 의해 흡수되어 인간 건강에 악영향을 미치므로 이에 대한 지속적인 모니터링이 요구된다.

Keywords

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