최근 10년간 광주 2차병원의 호흡기검체에서 분리된 비결핵항산균의 폐질환 유병률에 대한 연구
Study on the Prevalence of Lung Disease of Non-Tuberculosis Mycobacterium Isolated from Respiratory Specimens in Gwangju Second Hospital over the Last 10 Years
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최근 호흡기 검체에서 결핵균(Mycobacterium tuberculosis complex, MTBC) 검출은 감소하고 비결핵 항산균(nontuberculous mycobacteria, NTM)은 증가하고 있다. 본 연구는2010년부터 2019년까지 광주 2차 병원에 의뢰된 호흡기검체132,359예를 대상으로 NTM 검출 증가 대비 NTM 폐질환 환자의 증가와 연령 및 성별 분포를 조사하였다. 그리고 NTM양성환자의 폐결핵 감염 여부를 확인하고자 하였다. 항산균배양 양성률은 2010년 21.9% (1,624/7,403), 2019년 17.4% (1,937/ 11,161)였다. NTM 분리 비율은 2010년 38.0% (617/1,624) 에서 2019년에 72.4% (1,403/1,937)로 증가하였다. NTM 양성환자의 NTM 폐질환 진단률은 평균 27.1%였다. 이 중 현재폐결핵에 감염된 사례는 2010년 44.4%에서 2019년 23.5%로감소하고 과거 진단 또는 치료 사례도 15.6%에서 10.6%로 감소하였다. 전체 NTM 폐질환 중 69.0%가 60대 이상이었으며남자보다 여자 환자가 더 많았다. 향후 고령화와 결핵 관리 정책에 따라 NTM 검출은 증가하는 반면 MTBC는 감소할 것으로 예상되며, 실험실에서는 이 현상에 세심한 주의를 기울이고 지속적으로 검사 결과를 감시해야 할 것이다.
Abstract
Recently, the detection of Mycobacterium tuberculosis complex (MTBC) in respiratory specimens has decreased, and nontuberculous mycobacteria (NTM) has increased. This study examined the increase in NTM lung disease patients and their age and sex distribution compared to the increase in NTM detection in 132,359 respiratory specimens examined in a Gwangju Secondary Hospital from 2010 to 2019. Furthermore, the prevalence of pulmonary tuberculosis infection in NTM positive patients was investigated. The positive rates of the mycobacterial culture were 21.9% (1,624/7,403) in 2010 and 17.4% (1,937/11,161) in 2019. The NTM recovery rate increased from 38.0% (617/1,624) in 2010 to 72.4% (1,403/1,937) in 2019. The average diagnosis rate of NTM lung disease in the NTM positive patients was 27.1%. Among them, cases of current pulmonary tuberculosis infection decreased from 44.9% in 2010 to 23.4% in 2019, and cases of previous diagnosis or treatment decreased from 15.8% to 10.7%. Of all NTM lung diseases, 69.0% were in their 60s or older, with more females than males. In the future, according to aging and tuberculosis management policies, NTM detection is expected to increase while MTBC decreases and laboratories must pay close attention to this phenomenon and constantly monitor the test results.
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