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Erschienen in: Lasers in Medical Science 4/2022

14.01.2022 | COVID-19 | Original Article Zur Zeit gratis

Diagnosing COVID-19 in human serum using Raman spectroscopy

verfasst von: Ana Cristina Castro Goulart, Landulfo Silveira Jr., Henrique Cunha Carvalho, Cristiane Bissoli Dorta, Marcos Tadeu T. Pacheco, Renato Amaro Zângaro

Erschienen in: Lasers in Medical Science | Ausgabe 4/2022

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Abstract

This study proposed the diagnosis of COVID-19 by means of Raman spectroscopy. Samples of blood serum from 10 patients positive and 10 patients negative for COVID-19 by RT-PCR RNA and ELISA tests were analyzed. Raman spectra were obtained with a dispersive Raman spectrometer (830 nm, 350 mW) in triplicate, being submitted to exploratory analysis with principal component analysis (PCA) to identify the spectral differences and discriminant analysis with PCA (PCA-DA) and partial least squares (PLS-DA) for classification of the blood serum spectra into Control and COVID-19. The spectra of both groups positive and negative for COVID-19 showed peaks referred to the basal constitution of the serum (mainly albumin). The difference spectra showed decrease in the peaks referred to proteins and amino acids for the group positive. PCA variables showed more detailed spectral differences related to the biochemical alterations due to the COVID-19 such as increase in lipids, nitrogen compounds (urea and amines/amides) and nucleic acids, and decrease of proteins and amino acids (tryptophan) in the COVID-19 group. The discriminant analysis applied to the principal component loadings (PC2, PC4, PC5, and PC6) could classify spectra with 87% sensitivity and 100% specificity compared to 95% sensitivity and 100% specificity indicated in the RT-PCR kit leaflet, demonstrating the possibilities of a rapid, label-free, and costless technique for diagnosing COVID-19 infection.
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Metadaten
Titel
Diagnosing COVID-19 in human serum using Raman spectroscopy
verfasst von
Ana Cristina Castro Goulart
Landulfo Silveira Jr.
Henrique Cunha Carvalho
Cristiane Bissoli Dorta
Marcos Tadeu T. Pacheco
Renato Amaro Zângaro
Publikationsdatum
14.01.2022
Verlag
Springer London
Schlagwort
COVID-19
Erschienen in
Lasers in Medical Science / Ausgabe 4/2022
Print ISSN: 0268-8921
Elektronische ISSN: 1435-604X
DOI
https://doi.org/10.1007/s10103-021-03488-7

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