대전지역의 요로감염 환자로부터 분리된 요로병인성 대장균ST131과 Non-ST131의 비교 분석
Comparative Analysis of Uropathogenic Escherichia coli ST131 and Non-ST131 Isolated from Urinary Tract Infection Patients in Daejeon
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참고문헌
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초록
전 세계적으로 요로감염은 사람에서 가장 흔한 감염 질환 중하나로, 요로병인성 E. coli 는 요로감염의 주요 원인균이다. 요로병인성 E. coli 는 많은 항균제에 대한 내성이 점차 증가하고있어, 최근 요로감염의 항균제 치료에 큰 우려를 낳고 있는 실정이다. 본 연구는 2017년 3월부터 12월까지, 대전지역의 요로감염 환자에서 분리된 요로병인성 E. coli 84 균주를 대상으로 역학관계와 항균제 내성 양상을 조사하였다. 역학 관계를 확인하기 위해 다좌위 서열 형별분석(MLST)를 실시하였고, 항균제 감수성 시험은 E-test법으로 확인하였다. 본 연구 결과, 요로감염은 남성(26.2%)보다 여성(73.8%)에서 더 흔한 분포를 보였고, 70대가 가장 높은 분포의 연령대로 확인되었다. 84 균주의 요로병인성 E. coli 중, 59 균주(70.2%)가 다제내성이었으며, 주요seqeunce type은 ST131 (44 균주, 52.4%)임을 확인하였다. 흥미롭게도, non-ST131에서 다제내성의 비율(72.5%)이ST131 (68.2%)보다 더 높은 결과를 확인하였다. 이러한 연구결과는 non-ST131에서의 다제내성의 발달과 확산 가능성을의미하는 것으로 해석된다. 다제내성 non-ST131의 출현과 국제적인 확산을 예방하기 위해, 전 세계적으로 효과적인 감시 체계와 지속적인 연구가 수행되어야 할 것으로 사료된다.
Abstract
Uropathogenic Escherichia coli (UPEC) is a major cause of urinary tract infections (UTIs), which is one of the most common infectious diseases in humans worldwide. Since UPEC is increasingly gaining resistance to many antimicrobial agents, antibiotic therapy of UTI has recently become a great concern. This study examined the epidemiological relationship, and antimicrobial resistance patterns of 84 UPEC isolates obtained from UTI patients in Daejeon, from March to December 2017. Molecular epidemiology was investigated by multilocus sequence typing (MLST), and an antimicrobial susceptibility test was determined using an E-test. In this study, UTI was more common in females (73.8%) than in males (26.2%), and the highest incidence of UTI was observed in the age group in their 70s. Among the 84 UPEC isolates, 59 isolates (70.2%) were multidrug-resistant (MDR), and the major sequence type was ST131 (44 isolates, 52.4%). Interestingly, the rates of MDR in non-ST131 isolates (72.5%) were higher compared to ST131 isolates (68.2%). These results indicate the possibility of the development and spread of MDR in non-ST131 isolates. Effective surveillance networks and continuous research need to be conducted globally to prevent the emergence and international spread of MDR non-ST131 isolates.
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