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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 13 — May. 1, 2010
  • pp: C27–C35

Towards the clinical application of laser-induced breakdown spectroscopy for rapid pathogen diagnosis: the effect of mixed cultures and sample dilution on bacterial identification

Steven J. Rehse, Qassem I. Mohaidat, and Sunil Palchaudhuri  »View Author Affiliations


Applied Optics, Vol. 49, Issue 13, pp. C27-C35 (2010)
http://dx.doi.org/10.1364/AO.49.000C27


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Abstract

Laser-induced breakdown spectroscopy has been utilized to classify and identify bacterial specimens on the basis of their atomic composition. We have characterized the effect that the presence of a second bacterial species in the ablated specimen had on the identification of the majority species. Specimens with a reduced number of bacterial cells (approximately 2500) were identified with 100% accuracy when compared to undiluted specimens. In addition, a linear dependence of the total spectral power as a function of cell number was determined. Lastly, a high selectivity was obtained for a LIBS-based analysis of nine separate bacterial strains from four genera.

© 2010 Optical Society of America

OCIS Codes
(140.3440) Lasers and laser optics : Laser-induced breakdown
(170.4580) Medical optics and biotechnology : Optical diagnostics for medicine
(300.6210) Spectroscopy : Spectroscopy, atomic
(280.1415) Remote sensing and sensors : Biological sensing and sensors
(300.6365) Spectroscopy : Spectroscopy, laser induced breakdown

History
Original Manuscript: September 30, 2009
Revised Manuscript: January 12, 2010
Manuscript Accepted: January 15, 2010
Published: February 12, 2010

Virtual Issues
Vol. 5, Iss. 9 Virtual Journal for Biomedical Optics

Citation
Steven J. Rehse, Qassem I. Mohaidat, and Sunil Palchaudhuri, "Towards the clinical application of laser-induced breakdown spectroscopy for rapid pathogen diagnosis: the effect of mixed cultures and sample dilution on bacterial identification," Appl. Opt. 49, C27-C35 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-13-C27

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