Article ; Online: Culture-Independent Raman Spectroscopic Identification of Bacterial Pathogens from Clinical Samples Using Deep Transfer Learning.
2022 Volume 94, Issue 42, Page(s) 14745–14754
Abstract: ... Raman spectroscopy, a label-free and noninvasive technique, has overcome these drawbacks by providing ... rapid biochemical signatures from a single bacterium. Raman spectroscopy combined with chemometric ... Raman features for accurate classification while dealing with complex data sets such as spectra obtained ...
| Abstract | The rapid identification of bacterial pathogens in clinical samples like blood, urine, pus, and sputum is the need of the hour. Conventional bacterial identification methods like culturing and nucleic acid-based amplification have limitations like poor sensitivity, high cost, slow turnaround time, etc. Raman spectroscopy, a label-free and noninvasive technique, has overcome these drawbacks by providing rapid biochemical signatures from a single bacterium. Raman spectroscopy combined with chemometric methods has been used effectively to identify pathogens. However, a robust approach is needed to utilize Raman features for accurate classification while dealing with complex data sets such as spectra obtained from clinical isolates, showing high sample-to-sample heterogeneity. In this study, we have used Raman spectroscopy-based identification of pathogens from clinical isolates using a deep transfer learning approach at the single-cell level resolution. We have used the data-augmentation method to increase the volume of spectra needed for deep-learning analysis. Our ResNet model could specifically extract the spectral features of eight different pathogenic bacterial species with a 99.99% classification accuracy. The robustness of our model was validated on a set of blinded data sets, a mix of cultured and noncultured bacterial isolates of various origins and types. Our proposed ResNet model efficiently identified the pathogens from the blinded data set with high accuracy, providing a robust and rapid bacterial identification platform for clinical microbiology. |
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| MeSH term(s) | Spectrum Analysis, Raman/methods ; Bacteria ; Machine Learning ; Nucleic Acids ; Plant Extracts |
| Chemical Substances | Nucleic Acids ; Plant Extracts |
| Language | English |
| Publishing date | 2022-10-10 |
| Publishing country | United States |
| Document type | Journal Article ; Research Support, Non-U.S. Gov't |
| ZDB-ID | 1508-8 |
| ISSN | 1520-6882 ; 0003-2700 |
| ISSN (online) | 1520-6882 |
| ISSN | 0003-2700 |
| DOI | 10.1021/acs.analchem.2c03391 |
| Database | MEDical Literature Analysis and Retrieval System OnLINE |
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