LDBio Aspergillus immunochromatographic test lateral flow assay for IgG/IgM antibody detection in chronic pulmonary aspergillosis: Single-centre evaluation and meta-analysis
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Date
2022-06
Journal Title
Journal ISSN
Volume Title
Publisher
Indian Association of Medical Microbiologists
Abstract
Purpose: Chronic pulmonary aspergillosis (CPA) is an infection of the lung usually caused by Aspergillus fumigatus in patients with pre-existing pulmonary diseases. Its diagnosis hinges on demonstrating IgG antibodies against A. fumigatus. Herein, we evaluated the performance of a newly introduced point of care test (POCT) kit, the LDBio Aspergillus IgG/IgM lateral flow assay (LFA) in India with the standard ImmunoCAP kit for diagnosing CPA. Methods: A total of 60 serum samples (30 CPA cases and 30 controls) were evaluated by the Aspergillus immunochromatographic test (ICT) IgG/IgM LFA. Fluorescent-enzyme immunoassay was used to determine specific A. fumigatus-IgG concentrations (positive >27 mgA/L). Further, a systematic review and meta-analysis of studies (up to August 26, 2021) reporting the performance of LDBio ICT for the diagnosis of CPA was performed. Result: A sensitivity of 86.7%, specificity of 90%, negative predictive value of 87.1%, positive predictive value of 89.7%, negative likelihood ratio of 0.15, positive likelihood ratio of 8.67, and was observed for the LDBio IC. There was good agreement between LDBio ICT and ImmunoCAP (88.3%) with a Cohen's Kappa score of 0.77. Our systematic review identified four studies and the pooled sensitivity of 90%, specificity of 91%, area under the curve of 0.94 and diagnostic odds ratio of 57.2, for CPA diagnosis by LDBio ICT. Conclusion: Aspergillus LDBio ICT assay exhibits good sensitivity and can be used to screen CPA cases
Description
Keywords
Chronic pulmonary aspergillosis, LDBio ICT, Aspergillus, Immunochromatographic test, Systematic review, meta-Analysis
Citation
Singh Shreya, Choudhary Hansraj, Agnihotri Sourav, Sehgal Inderpaul Singh, Agarwal Ritesh, Kaur Harsimran, Ghosh Anup, Chakrabarti Arunaloke, Rudramurthy Shivaprakash M.. LDBio Aspergillus immunochromatographic test lateral flow assay for IgG/IgM antibody detection in chronic pulmonary aspergillosis: Single-centre evaluation and meta-analysis. Indian Journal of Medical Microbiology. 2022 Jun; 40(2): 204-210