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결핵균의 항결핵제 내성 전환 패턴

The Patterns of Conversion to Anti-Tuberculosis Drug Resistance in Mycobacterium tuberculosis

  • 정무상 (제주한라대학교 임상병리과) ;
  • 이규택 (녹십자의료재단 진단검사의학과)
  • Chong, Moo-Sang (Department of Clinical Laboratory Science, Cheju Halla University) ;
  • Lee, Kyutaeg (Department of Laboratory Medicine, Green Cross Laboratories)
  • 투고 : 2022.04.29
  • 심사 : 2022.05.22
  • 발행 : 2022.06.30

초록

다제내성결핵과 광범위내성결핵은 결핵 치료의 문제가 되고 있으며 발생빈도 역시 증가하고 있다. 본 연구는 2010년 1월부터 2019년 12월까지 녹십자의료재단 의뢰된 환자를 대상으로 Löwenstein-Jensen 고체배지와 pyrazinamide for pyrazinamidase를 이용하여 약물감수성시험(DST)을 시행하여 내성으로 전환되는 항결핵제 패턴과 평균 추적 기간을 분석하였다. 항결핵제 중 1개 이상의 항결핵제 내성을 보인 증례들에서 초기 의뢰 시 INH 항결핵제에 내성인 경우가 55명(33.1%)으로 가장 높은 비율로 나타났으며, 내성으로 전환된 항결핵제는 EMB 17명(26.6%), RFP 14명(21.9%), QUI 14명(21.9%), PZA 12명(10.9%) 순으로 조사되었다. 10개의 항결핵제에 모두 감수성인 증례들에서는 INH 항결핵제에 대한 내성 전환은 43명(7.2%)으로 가장 빈도가 높았으며, 평균 추적 기간은435.6일로 조사되었으며, 내성으로 전환되는 항결핵제의 내성전환율은 INH 43명(7.2%), RFP 23명(3.9%), SM 11명(1.9%), QUI 4명(0.7%), AMK 3명(0.5%), EMB 3명(0.5%)이었다. 이에 본 연구는 항결핵제에 대한 감수성에서 내성으로의 전환은 특히 다제내성결핵과 광범위 내성결핵의 전환되는 환자에게 매우 중요한 자료가 될 것으로 보이며, 결핵 치료에서 환자 치료에 도움이 될 것으로 사료된다.

The prevalence of multidrug-resistant TB (MDR-TB) and extensively drug-resistant TB (XDR-TB) are increasing. We analyzed the patterns of drug resistance and tracking period days of acquiring anti-mycobacterial resistance. From January 2010 to December 2019, drug susceptibility tests (DST) were performed by the absolute concentration method using the Löwenstein-Jensen solid medium and pyrazinamidase activity test (to assess pyrazinamide resistance) in samples from patients who were referred to the Green Cross Laboratories in Yongin. Among the cases that showed resistance to one or more anti-tuberculosis drugs, 55 patients (33.1%) were resistant to isoniazid (INH) at the time of initial referral, and the rates for the development of resistant anti-tuberculosis drugs were ethambutol (EMB) (26.6%), rifampicin (RFP) (21.9%), quinolones (QUI) (21.9%) and pyrazinamide (PZA) (10.9%), in that order. In the cases sensitive to all 10 anti-tuberculosis drugs initially, the development of resistance to INH was the most frequent, seen in 43 patients (7.2%). The average follow-up period was 435.6 days, and the resistance development was observed in the order of INH (7.2%), RFP (3.9%), SM (1.9%), QUI (0.7%), amikacin (AMK) (0.5%), and EMB (0.5%). The conversion of susceptible strains to resistant strains is an important warning sign for the patient, especially in cases of conversion to MDR or XDR. This information would be helpful for improving patient care during TB treatment.

키워드

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