Rapid detection of Mycobacterium tuberculosis using a novel ultrafast chip-type real-time polymerase chain reaction system

Seung Hyeun Lee, Sung Woo Kim, Sehyun Lee, EunSub Kim, Duck Joong Kim, Sohyun Park, Eun Joo Lee, Sang Yeub Lee, Ji Sung Lee, Chae Seung Lim, Won-Ki Kim, Kwang Ho In

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

BACKGROUND: NBS LabChip G2-3 is a novel, ultrafast, chip-type portable real-time polymerase chain reaction (PCR) system. We evaluated the clinical usefulness of this system in detecting pulmonary TB and assessed its diagnostic performance compared witha conventional tube-type PCR system. METHODS: A total of 247 sputum samples were collected from patients suspected of having pulmonary TB. After the decontamination process, these samples were examined by fluorescence staining for acid-fast bacilli, cultures with both solid and liquid media, and real-time PCR with the NBS LabChip and a conventional tube-type system. The diagnostic accuracy of the NBS LabChip system and the agreement between the two assays were evaluated. RESULTS: Considering mycobacterial culture results as a gold standard, the overall sensitivity and specificity of the NBS LabChip was 83.8% (95% CI, 73.8%-91.1%) and 94.0% (95% CI, 89.3%-97.1%), respectively. For the detection of TB from the smear-positive samples, the sensitivity and specificity of the NBS LabChip was 96.0% (95% CI, 86.3%-99.5%) and 83.3% (95% CI, 72.3%-95.7%), respectively. For the smear-negative samples, the sensitivity and specificity of the NBS LabChip was 63.3% (95% CI, 43.9%-80.1%) and 95.0% (95% CI, 90.4%-97.8%), respectively. There were no significant differences in the sensitivity and specificity between the NBS LabChip and a conventional tube-type system, although the NBS LabChip shortened the PCR time (27 min for 45 cycles). CONCLUSIONS: The NBS LabChip G2-3 system has potential as an ultrafast, cost-effective diagnostic tool for pulmonary TB with high sensitivity and specificity.

Original languageEnglish
Pages (from-to)1319-1326
Number of pages8
JournalChest
Volume146
Issue number5
DOIs
Publication statusPublished - 2014 Jan 1

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine
  • Critical Care and Intensive Care Medicine
  • Cardiology and Cardiovascular Medicine

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