Korean Journal of Clinical Laboratory Science (대한임상검사과학회지)

Korean Society for Clinical Laboratory Science (대한임상검사과학회)
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Rapid Detection of Mycobacterium tuberculosis Complex in Tissues by Using the Nested PCR

Nested PCR을 이용하여 조직으로부터 Mycobacterium tuberculosis Complex 신속검출

  • 박정연 (진주보건대학교 임상병리과) ;
  • 양병선 (진주보건대학교 임상병리과)
  • Received : 2015.10.06
  • Accepted : 2015.10.30
  • Published : 2015.12.30
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Abstract

Due to the increase in incidence of infection of Mycobacterium tuberculosis complex (MTC), it is imperative that a rapid diagnosis accompanies the handling of MTC. This is due to the three to eight weeks it takes to culture Mycobacteria, and the lack of sensitivity of microscopic examination of AFB. Recently, nested PCR has been used to detect and diagnose mycobacteria. It is especially useful in complementing diagnosis by histological extra pulmonary. After culturing all the specimens and practicing the nested PCR, we did comparison analysis between nested PCR and culture. There were 76 specimens, 31 of which were positive. Of the 31 positive specimens in culturing, only 22 were positive in nested PCR. Of the 45 negative specimens, 36 were negative in nested PCR. As a result, Sensitivity was 71% and specificity was 80%. Furthermore, the positive predictive value was 71% and negative predictive value was 80%. These results indicate that nested PCR based techniques are sensitive, specific, and rapid methods for the detection of MTC.

결핵균의 감염이 증가함에 따라 결핵을 진단하고 치료하는 데 있어서 빠르고 민감한 진단방법이 필수적이다. Mycobacteria를 배양하는 것이 적어도 3주에서 8주정도 기간이 걸리고, 또한 AFB의 현미경적 검경의 민감도가 낮다. 최근에는 PCR방법이 결핵균을 검출하고 진단하는데 사용되고 있다. 특히 병리조직학적 폐 외 감염의 진단을 하기 위해 실시하고 있다. 병원에서 76개의 조직검체를 배양하고 nested PCR을 실시하여 배양결과와 비교 분석 하였다. 76개의 조직검체 중 배양 결과 양성인 검체가 31개, 음성으로 나온 검체가 45개로 나타났다. 배양결과 양성인 31개 검체 중 nested PCR을 실시해서 양성으로 나온 검체 22개(71%)가 양성으로 나타났고, 배양결과 음성인 45개 검체 중 nested PCR을 실시해서 음성으로 나온 검체는 36개(80%)로 나타났다. nested PCR의 민감도는 71%이고 특이도는 80%이다. 또한 양성 예측률은 71% 음성 예측률은 80%로 나타났다. Nested PCR 방법은 민감하고 신속하게 MTC을 검출 할 수 있다.

Keywords

References

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