Abstract
Background
A clear cutoff value of galactomannan (GM) has not been established for chronic pulmonary aspergillosis (CPA) and is frequently extrapolated from invasive pulmonary aspergillosis. We performed a systematic review and meta-analysis to evaluate the diagnostic performance of serum and bronchoalveolar lavage (BAL) GM, and to propose a cutoff.
Methods
We extracted from the studies the cutoff of serum or/and BAL GM associated with true positives, false positives, true negatives, and false negatives. We performed a multi-cutoff model and a non-parametric random effect model. We estimated the optimal cutoff and the area under the curve (AUC) for GM in serum and BAL samples.
Results
Nine studies from 1999 to 2021 were included. Overall, the optimal cutoff of serum GM was 0.96 with a sensitivity of 0.29 (95%CI: 0.14–0.51); specificity of 0.88 (95%CI: 0.73–0.95); and AUC of 0.529 (with a CI: [0.415–0.682] [0.307–0.713]). The AUC for the non-parametric ROC model was 0.631. For BAL GM the cutoff was 0.67 with a sensitivity of 0.68 (95%CI: 0.51–0.82), specificity of 0.84 (95%CI: 0.70–0.92), and AUC of 0.814 (with a CI: [0.696–0.895] [0.733–0.881]). The AUC for the non-parametric model was 0.789.
Conclusion
The diagnosis of CPA requires the assessment of a combination of mycological and serological factors, as no single serum and/or BAL GM antigen test is adequate. BAL GM performed better than serum, with better sensitivity and excellent accuracy.
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Data availability
The datasets generated during and/or analysed during the current study are not publicly available, because the authors elected to not share, but are available from the corresponding author on reasonable request.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Vítor Falcão de Oliveira and Guilherme Diogo Silva. The first draft of the manuscript was written by Vítor Falcão de Oliveira and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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de Oliveira, V.F., Silva, G.D., Taborda, M. et al. Systematic review and meta-analysis of galactomannan antigen testing in serum and bronchoalveolar lavage for the diagnosis of chronic pulmonary aspergillosis: defining a cutoff. Eur J Clin Microbiol Infect Dis 42, 1047–1054 (2023). https://doi.org/10.1007/s10096-023-04639-0
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DOI: https://doi.org/10.1007/s10096-023-04639-0