Evaluation of the EUROIMMUN Aspergillus antigen immunoenzyme assay in serum and bronchoalveolar lavage fluid samples

The most widely used marker for the diagnosis of invasive aspergillosis (IA) is the detection of galactomannan by ELISA. This study describes the evaluation of the results obtained by Euroimmun Aspergillus antigen ELISA (EIA-GM-E) in serum samples and bronchoalveolar lavage fluid (BAL) from patients...

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Published in:Enfermedades infecciosas y microbiologia clinica (English ed.) Vol. 41; no. 3; pp. 176 - 180
Main Authors: Roiz-Mesones, María Pía, Pintos-Fonseca, Ana de Malet, Ahedo-García, Noelia, Alegría-Puig, Carlos Ruiz de
Format: Journal Article
Language:English
Published: Spain Elsevier España, S.L.U 01-03-2023
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Summary:The most widely used marker for the diagnosis of invasive aspergillosis (IA) is the detection of galactomannan by ELISA. This study describes the evaluation of the results obtained by Euroimmun Aspergillus antigen ELISA (EIA-GM-E) in serum samples and bronchoalveolar lavage fluid (BAL) from patients at risk of IA, and compares these results with those obtained by Bio-Rad Galactomannan EIA (EIA-GM-BR). Anonymous retrospective case–control comparative study in 64 serum samples and 28 BAL from 51 patients. Overall agreement of the results of the two assays was observed in 72 of 92 samples (78.3%). The sensitivity of EIA-GM-BR and EIA-GM-E in serum samples was 88.9% and 43.2%, respectively, and 100% and 88.9% for BAL. The specificity of EIA-GM-BR and EIA-GM-E in serum samples was 91.9% for both assays, and 68.4% and 84.2% in BAL. There were no statistically significant differences in the results of both assays. Both methods show good results for the discrimination of patients with IA when BAL is tested, or serum in case of EIA-GM-BR. El marcador más utilizado para el diagnóstico de aspergilosis invasora (AI) es la detección de galactomanano mediante la técnica de ELISA. Este estudio describe la evaluación de los resultados obtenidos por Euroimmun Aspergillus antigen ELISA (EIA-GM-E) en muestras de suero y lavado broncoalveolar (LBA) de pacientes con factores de riesgo de AI, y compara sus resultados con los obtenidos por Bio-Rad Galactomannan EIA (EIA-GM-BR). Estudio comparativo caso-control retrospectivo anónimo en 64 muestras de suero y 28 de LBA de 51 pacientes. Se observó una concordancia global de resultados de los dos ensayos en 72 de las 92 muestras (78,3%). Los valores de sensibilidad de EIA-GM-BR y EIA-GM-E en suero fueron 88,9% y 43,2%, respectivamente, y para LBA 100% y 88,9%. La especificidad en suero de EIA-GM-BR y EIA-GM-E fue del 91,9% en ambos ensayos y para LBA 68,4% y 84,2%. No se observaron diferencias estadísticamente significativas en los resultados de ambos ensayos. Ambos métodos demuestran buenos resultados para la discriminación de pacientes con AI cuando se emplea como muestra el LBA, o el suero en caso de EIA-GM-BR.
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ISSN:2529-993X
2529-993X
DOI:10.1016/j.eimce.2021.08.018