Cited by 207Spectroscopy Techniques in Biomedical and Chemical ResearchGold and Silver Nanoparticles Synthesis and ApplicationsBacterial Identification and Susceptibility Testing

Barcoding bacterial cells: a SERS‐based methodology for pathogen identification

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Patel, I. S., Premasiri, W. R., Moir, D. T., Ziegler, L. D.·2008·Journal of Raman Spectroscopy

Abstract

A principal component analysis (PCA) based on the sign of the second derivative of the surface‐enhanced Raman scattering (SERS) spectrum obtained on in situ grown Au‐cluster‐covered SiO 2 substrates results in improved reproducibility and enhanced specificity for bacterial diagnostics. The barcode‐generated clustering results are systematically compared with those obtained from the corresponding spectral intensities, first derivatives and second derivatives for the SERS spectra of closely related cereus group Bacillus strains. PCA plots and the corresponding hierarchical cluster analysis (HCA) dendrograms illustrate the improved bacterial identification resulting from the barcode spectral data reduction. Supervised discriminant function analysis (DFA) plots result in slightly improved group separation but show more susceptibility to false positive classifications than the corresponding PCA contours. In addition, this PCA treatment is used to highlight the enhanced bacterial species specificity observed for SERS as compared to normal bulk (non‐SERS) Raman spectra. The identification algorithm described here is critical for the development of SERS microscopy as a rapid, reagentless and portable diagnostic of bacterial pathogens. Copyright © 2008 John Wiley & Sons, Ltd.

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  1. [1]Vo-Dinh T Yan F Stokes DL Methods Mol Biol 300 255 83 2005 15657488

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Authors
Patel, I. S., Premasiri, W. R., Moir, D. T., & Ziegler, L. D.
Affiliations
  • Boston University (US)
  • Microbiotix (United States) (US)
Corresponding author
Ziegler, L. D.
Venue
Journal of Raman Spectroscopy
Publisher
Wiley
Published
2008-10-17
Volume
39
Issue
11
Pages
1660-1672
ISSN
  • 0377-0486 (ISSN-L)
  • 1097-4555
OpenAlex
W2003515234
Cited by
207
References
36
Citations by year
2026: 5 · 2025: 4 · 2024: 10 · 2023: 13 · 2022: 4 · 2021: 9 · 2020: 11 · 2019: 6 · 2018: 13 · 2017: 23 · 2016: 14 · 2015: 15 · 2014: 11 · 2013: 9 · 2012: 20
FWCI
7.05
Type
journal article
Language
en
Open access
Locations
  • Journal of Raman Spectroscopy (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • National Institute of Allergy and Infectious Diseases (R41AI066641)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biophysics › Spectroscopy Techniques in Biomedical and Chemical Research
  • Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Gold and Silver Nanoparticles Synthesis and Applications
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Clinical Biochemistry › Bacterial Identification and Susceptibility Testing
Keywords
surface-enhanced Raman spectroscopy, bacterial identification, second derivative spectra, principal component analysis, Bacillus cereus group, spectral data reduction, hierarchical clustering, discriminant analysis

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