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Spatial Mapping of Pyocyanin in Pseudomonas Aeruginosa Bacterial Communities Using Surface Enhanced Raman Scattering

Journal Article · · Applied Spectroscopy
 [1];  [2];  [2];  [2];  [2]
  1. Univ. of Notre Dame, IN (United States); University of Notre Dame
  2. Univ. of Notre Dame, IN (United States)
Surface enhanced Raman spectroscopy (SERS) imaging was used in conjunction with principal component analysis (PCA) for the in situ spatiotemporal mapping of the virulence factor pyocyanin in communities of the pathogenic bacterium Pseudomonas aeruginosa. The combination of SERS imaging and PCA analysis provides a robust method for the characterization of heterogeneous biological systems while circumventing issues associated with interference from sample autofluorescence and low reproducibility of SERS signals. The production of pyocyanin is found to depend both on the growth carbon source and on the specific strain of P. aeruginosa studied. A cystic fibrosis lung isolate strain of P. aeruginosa synthesizes and secretes pyocyanin when grown with glucose and glutamate, while the laboratory strain exhibits detectable production of pyocyanin only when grown with glutamate as the source of carbon. Pyocyanin production in the laboratory strain grown with glucose was below the limit of detection of SERS. In addition, the combination of SERS imaging and PCA can elucidate subtle differences in the molecular composition of biofilms. As a result, PCA loading plots from the clinical isolate exhibit features corresponding to vibrational bands of carbohydrates, which represent the mucoid biofilm matrix specific to that isolate, features that are not seen in the PCA loading plots of the laboratory strain.
Research Organization:
Univ. of Notre Dame, IN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1811273
Journal Information:
Applied Spectroscopy, Journal Name: Applied Spectroscopy Journal Issue: 2 Vol. 71; ISSN 0003-7028
Publisher:
Society for Applied SpectroscopyCopyright Statement
Country of Publication:
United States
Language:
English

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  • Kneipp, Katrin; Kneipp, Harald; Dresselhaus, Mildred S.
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Cited By (5)

A multifunctional SERS sticky note for real-time quorum sensing tracing and inactivation of bacterial biofilms journal January 2018
Review on SERS of Bacteria journal November 2017
Detection of Pseudomonas aeruginosa Metabolite Pyocyanin in Water and Saliva by Employing the SERS Technique journal July 2017
Chemosensory epithelial cells in the urethra: sentinels of the urinary tract journal September 2016
Surface-Enhanced Raman Scattering (SERS) in Microbiology: Illumination and Enhancement of the Microbial World journal March 2018

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