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Performance characteristics of nested polymerase chain reaction vs real-time polymerase chain reaction methods for detecting Mycobacterium tuberculosis complex in paraffin-embedded human tissues



Performance characteristics of nested polymerase chain reaction vs real-time polymerase chain reaction methods for detecting Mycobacterium tuberculosis complex in paraffin-embedded human tissues



American Journal of Clinical Pathology 142(3): 384-390



Nucleic acid amplification tests on formalin-fixed, paraffin-embedded (FFPE) tissue specimens enable Mycobacterium tuberculosis complex (MTB) detection and rapid tuberculosis diagnosis in the absence of microbiologic culture tests. We aimed to evaluate the efficacy of different polymerase chain reaction (PCR) methods for detecting Mycobacterium species in FFPE tissues. We examined 110 FFPE specimens (56 nonmycobacterial cases, 32 MTB, and 22 nontuberculous mycobacteria [NTM] determined by acid-fast bacilli [AFB] culture) to assess five PCR methods: nested PCR (N-PCR) (Seeplex MTB Nested ACE Detection; Seegene, Seoul, South Korea), an in-house real-time PCR (RT-PCR) method, and three commercial RT-PCR methods (AccuPower MTB RT-PCR [Bioneer, Seoul, Korea], artus M tuberculosis TM PCR [Qiagen, Hilden, Germany], and AdvanSure tuberculosis/NTM RT-PCR [LG Life Sciences, Seoul, Korea]). The results of N-PCR, in-house RT-PCR, and AdvanSure RT-PCR correlated well with AFB culture results (concordance rates, 94.3%, 87.5%, and 89.5%, respectively). The sensitivity of N-PCR (87.5%) was higher than that of the RT-PCR methods, although these differences were not statistically significant between N-PCR and the in-house and AdvanSure RT-PCR methods (68.8% and 80.0%, respectively). All the PCR methods had high specificities, ranging from 98.2% to 100%. Only two NTM cases were detected by AdvanSure RT-PCR, implying a very low sensitivity. Well-designed RT-PCR and N-PCR can effectively identify MTB in FFPE specimens.

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Accession: 054925344

Download citation: RISBibTeXText

PMID: 25125630

DOI: 10.1309/ajcp2qzrh4znprdd


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