Abstract
Chronic pulmonary aspergillosis (CPA) is common among individuals with underlying lung diseases. The clinical manifestations of CPA include systemic symptoms (e.g., weight loss, fatigue, fever), chronic productive cough, chest discomfort, and occasional haemoptysis, which are similar to the manifestations of pulmonary tuberculosis (PTB) and are often misdiagnosed as PTB. Considering the striking similarities between CPA and PTB in clinical manifestations and imaging features, more specific microbiological and serological detections are needed for a definitive diagnosis. This study aimed to explore the clinical characteristics of CPA in TB as well as the diagnostic significance of Aspergillus-specific IgG and Aspergillus-specific IgM.
A total of 140 patients diagnosed with TB by culture between December 2017 and February 2019 were included. Enrolled patients were categorized into two groups (CPA group and non-CPA group) according to CPA diagnostic criteria. All collected specimens were subjected to Aspergillus-specific IgG and IgM detection testing.
The median concentration of Aspergillus-specific IgG in the CPA group (211.04 AU/ml) was significantly higher than that in the non-CPA group (77.88 AU/ml) (Z value − 6.397, P < 0.001). The sensitivity and specificity of Aspergillus-specific IgG for CPA diagnosis were 81.82% and 72.97%, respectively. In the chronic cavitary pulmonary aspergillosis (CCPA) group, the IgG positivity rate (≥ 120 AU/ml) was 96.2%, which was 21.4% in the non-CCPA patients (P < 0.001).
The detection of Aspergillus-specific IgG serological changes is feasible and facilitates reliable differentiation between Aspergillus and Mycobacterium tuberculosis infection. However, Aspergillus-specific IgM has limited diagnostic value, with unsatisfactory sensitivity results.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Not applicable.
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Acknowledgements
We would like to thank Qionglan Zhang of the electronic bronchoscopy room for assistance and Director Lixia Zhang of the Clinical Laboratory of Tianjin Haihe Hospital for guidance. We would like to thank Dynamiker Biotechnology (Tianjin) Co., Ltd., for providing the kits at no cost for this study.
Funding
This study was supported by grants from the Science and Technology Fund of Tianjin Haihe Hospital (HHYY-202013) and the Science and Technology Project of Tianjin Municipal Health Commission (No. 2013KZ043).
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ZXM, JFH, HWY, YZ, PJ, and YX conducted the study design. ZXM and JFH tested the specimens. ZXM, JFH, and HWY performed the data analysis and prepared the manuscript. ZXM, JFH, HWY, YZ, PJ, YX, and PRH reviewed and approved the manuscript.
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The study was approved by the Institutional Ethics Committee of Tianjin Haihe Hospital, Tianjin, China (2021HHWZ-001). The institutional review board of the Tianjin Haihe Hospital waived the need for written informed consent because the study involved only a minimal risk to the patients.
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The institutional review board of the Tianjin Haihe Hospital waived the need for written informed consent because the study involved only a minimal risk to the patients.
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Mei, ZX., Han, JF., Yu, HW. et al. Detection of serum Aspergillus-specific IgM and IgG antibody levels for the diagnosis of chronic pulmonary aspergillosis developed in patients with tuberculosis. Eur J Clin Microbiol Infect Dis 42, 1081–1089 (2023). https://doi.org/10.1007/s10096-023-04637-2
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DOI: https://doi.org/10.1007/s10096-023-04637-2