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Journal of Tuberculosis and Lung Disease ›› 2025, Vol. 6 ›› Issue (4): 413-419.doi: 10.19983/j.issn.2096-8493.20250024

• Original Articles • Previous Articles     Next Articles

Study on the diagnostic value of nanopore sequencing technology for non-tuberculous mycobacterial pulmonary disease

Huang Gaoyan, Su Shenxiao, Zhao Juanjuan, Liang Baoyuan, Meng Xiayan(), He Huawei   

  1. Department of Tuberculosis, Nanning Fourth People’s Hospital/Guangxi Clinical Treatment Center for AIDS (Nanning), Nanning 530021,China
  • Received:2025-01-23 Online:2025-08-20 Published:2025-08-08
  • Contact: Meng Xiayan, Email: 2540089309@qq.com
  • Supported by:
    Self-funded Research Project of Guangxi Zhuang Autonomous Region Health Commission(Z-A20231204)

Abstract:

Objective: To explore the diagnostic value of nanopore sequencing technology for detecting non-tuberculous mycobacterial pulmonary disease (NTM-PD) in bronchoalveolar lavage fluid (BALF). Methods: A total of 155 patients with suspected NTM-PD admitted to the Tuberculosis Department of Nanning Fourth People’s Hospital from January 1, 2022, to December 31, 2024, were enrolled. BALF samples collected via bronchoscopy were subjected to mycobacterial culture and identification, fluorescence PCR melting curve method, and nanopore sequencing. The diagnostic efficiencies of these three methods were compared. Results: Among the patients, 96 were diagnosed with NTM-PD (NTM-PD group) and 59 with non-NTM pulmonary diseases (including 29 cases of pulmonary tuberculosis and 30 cases of other pneumonias). The sensitivity, diagnostic concordance rate, and Kappa value of nanopore sequencing for NTM-PD diagnosis were 92.71% (95%CI: 85.98%-96.75%), 86.45% (95%CI: 79.81%-91.56%), and 0.706 (95%CI: 0.586-0.808),The sensitivity of nanopore sequencing was significantly higher than that of mycobacterium identification by fluorescence PCR melting curve method (63.54%,95%CI:53.18%-73.09%;71.61%,95%CI:63.91%-78.49%;0.445,95%CI:0.350-0.618), mycobacterium culture and identification (63.54%,95%CI:53.18%-73.09%;74.84%,95%CI:67.35%-81.44%;0.515,95%CI:0.453-0.703), and the combination of the latter two methods (84.38%,95%CI:75.53%-90.94%;82.58%,95%CI:75.67%-88.23%;0.634,95%CI:0.523-0.761). However,the specificity of nanopore sequencing was 76.27%(95%CI:63.60%-86.37%), which was lower than that of mycobacterium identification by fluorescence PCR melting curve method (84.75%,95%CI:72.90%-92.71%), mycobacterium culture and identification (93.22%,95%CI:83.54%-98.01%), and the combination of the latter two methods (79.66%,95%CI:67.34%-89.14%). Conclusion: Nanopore sequencing technology has high diagnostic efficiency for NTM-PD and can directly identify bacterial species, but specificity issues should be considered in clinical application.

Key words: Nanopore sequencing, Atypical bacteria forms, Mycobacterium, Bronchoalveolar lavage fluid

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