낙동강과 금호강에서 분리된 광범위 베타 락탐 분해효소 생성 Escherichia coli내 항균제 내성 및 integrons의 분포 (Prevalence of antimicrobial resistance and integrons in extended-spectrum β-lactamases producing Escherichia coli isolated from Nakdong and Gumho river)

서지정보

· 발행기관 : 한국동물위생학회
· 수록지 정보 : 한국동물위생학회지 / 37권 / 1호 / 19 ~ 27페이지
· 저자명 : 조재근, 김환득, 권순효, 김진현, 장성일, 박최규, 김기석

초록

This study was conducted to investigate the antimicrobial resistance, presence of β-lactamase genes and integrons in 83 ESBL-producing Escherichia coli isolated from Nakdong river and Geumho river in Daegu. Among the β-lactam antimicrobials, all isolates were resistant to ampicillin, cephalothin, cefa-mandole and cefotaxime, followed by piperacillin (98.8%), ampicillin/sulbactam (86.7%), aztreonam (60.2%) and cefepime (59.0%), whereas resistance to piperacillin/tazobacram, ticarcillin/clavulanic acid and cefoxitin was less than 30%. Many of the ESBL-producing Escherichia coli were also resistant to non-β-lactams antimicrobials such as nalidixic acid (83.1%), sulfonamides (72.3%), ciprofloxacin (62.7%) and gentamicin (38.6%). All isolates showed resistance to seven or more antimicrobial agents. The most frequently detected gene was blaTEM+CTX-M (49.4%), followed by blaCTX-M (27.7%), blaTEM (6.0%) and blaOXA (1.2%). But blaSHV was not found. Class 1 integrons were found in 61.4% (51 iso-lates) of isolates, however, class 2 and 3 integrons were not detected. The results showed water from Nakdong river and Geumho river is contaminated with ESBL-producing E. coli isolates. These results suggest the need for further investigation of antibiotic resistant bacteria to prevent public health impacts in the water environment.

영어초록

This study was conducted to investigate the antimicrobial resistance, presence of β-lactamase genes and integrons in 83 ESBL-producing Escherichia coli isolated from Nakdong river and Geumho river in Daegu. Among the β-lactam antimicrobials, all isolates were resistant to ampicillin, cephalothin, cefa-mandole and cefotaxime, followed by piperacillin (98.8%), ampicillin/sulbactam (86.7%), aztreonam (60.2%) and cefepime (59.0%), whereas resistance to piperacillin/tazobacram, ticarcillin/clavulanic acid and cefoxitin was less than 30%. Many of the ESBL-producing Escherichia coli were also resistant to non-β-lactams antimicrobials such as nalidixic acid (83.1%), sulfonamides (72.3%), ciprofloxacin (62.7%) and gentamicin (38.6%). All isolates showed resistance to seven or more antimicrobial agents. The most frequently detected gene was blaTEM+CTX-M (49.4%), followed by blaCTX-M (27.7%), blaTEM (6.0%) and blaOXA (1.2%). But blaSHV was not found. Class 1 integrons were found in 61.4% (51 iso-lates) of isolates, however, class 2 and 3 integrons were not detected. The results showed water from Nakdong river and Geumho river is contaminated with ESBL-producing E. coli isolates. These results suggest the need for further investigation of antibiotic resistant bacteria to prevent public health impacts in the water environment.

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