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  • Electronic Journal of Emerging Infectious Diseases ›› 2025, Vol. 10 ›› Issue (5): 53-58.doi: 10.19871/j.cnki.xfcrbzz.2025.05.010

    • Original Articles • Previous Articles     Next Articles

    Analysis of the diagnostic value of molecular diagnostic techniques combined with cytokine expression for differentiating pulmonary tuberculosis from nontuberculous mycobacterial lung infections

    Zhao Yun, Xu Fang, Wang Chen, Sheng Fang   

    1. Department of infectious diseases, Zhangjiagang Hospital Affiliated to Suzhou University, Jiangsu Suzhou 215600, China
    • Received:2025-03-21 Online:2025-10-31 Published:2025-11-17

    Abstract: Objective To investigate the diagnostic efficacy of integrating molecular diagnostic methods with cytokine expression for distinguishing from pulmonary tuberculosis and nontuberculous mycobacterial(NTM) lung disease. Method A study was carried out to retrospectively analyze the clinical data of 70 patients diagnosed with pulmonary tuberculosis (referred to as the observation group) and 40 patients with NTM lung disease (the control group) treated at our hospital between January 2022 and July 2024. All individuals underwent testing using Xpert MTB/RIF Ultra, and their peripheral blood serum cytokine expression profiles were assessed, including interleukin (IL)-2, IL-4, IL-5, IL-6, IL-10, IL-12/23p40, IL-17 and tumor necrosis factor α (TNF-α). Binary logistic regression analysis was performed to investigate risk factors risk factors closely associated with the accurate identification of pulmonary tuberculosis. The effectiveness of each risk factor in combination for discriminating pulmonary tuberculosis was assessed using methods such as the receiver operating characteristic (ROC) curve, calibration curve, and decision curve analysis (DCA). Result The detection rate of Xpert MTB/RIF Ultra testing and the mean levels of IL-4, IL-6, and IL-12/23p40 in the observation group were significantly higher compared to those in the control group, whereas the mean level of TNF-α was significantly lower than that in the control group (P<0.05). Univariate and multivariate logistic regression analysis demonstrated that Xpert MTB/RIF Ultra testing, IL-6, IL-12/23p40, and TNF-α were independent factors influencing the diagnosis of pulmonary tuberculosis (P< 0.05). The ROC curve analysis revealed that the AUC (95%CI) for the combined differential diagnosis of pulmonary tuberculosis utilizing Xpert MTB/RIF Ultra testing, IL-6, IL-12/23p40, and TNF-α was 0.889 (0.821-0.957). Both the calibration curve and DCA curve confirmed that the combined diagnostic model based on these parameters exhibited high accuracy and substantial clinical returns. Conclusion The efficacy of the model utilizing the molecular diagnostic method Xpert MTB/RIF Ultra together with IL-6, IL-12/23p40, and TNF-α in discriminating between pulmonary tuberculosis and NTM lung disease is considerable.

    Key words: Pulmonary tuberculosis, Nontuberculous mycobacteria, Molecular diagnostic techniques, Cytokines, Differential diagnosis

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