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Applied and Environmental Microbiology, March 1999, p. 1312-1315, Vol. 65, No. 3
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Pulsed-Light Inactivation of Food-Related Microorganisms

N. J. Rowan,1,* S. J. MacGregor,2 J. G. Anderson,1 R. A. Fouracre,2 L. McIlvaney,2 and O. Farish2

Department of Bioscience & Biotechnology,1 and the Department of Electronic & Electrical Engineering,2 University of Strathclyde, Glasgow, Scotland

Received 17 August 1998/Accepted 25 November 1998

The effects of high-intensity pulsed-light emissions of high or low UV content on the survival of predetermined populations of Listeria monocytogenes, Escherichia coli, Salmonella enteritidis, Pseudomonas aeruginosa, Bacillus cereus, and Staphylococcus aureus were investigated. Bacterial cultures were seeded separately on the surface of tryptone soya-yeast extract agar and were reduced by up to 2 or 6 log10 orders with 200 light pulses (pulse duration, ~100 ns) of low or high UV content, respectively (P < 0.001).

* Corresponding author. Mailing address: Department of Bioscience and Biotechnology, University of Strathclyde, Royal College, 204 George St., Glasgow G1 1XW, Scotland. Phone: 44 141 548 2531. Fax: 44 141 553 1161. E-mail: n.j.rowan{at}strath.ac.uk.

Applied and Environmental Microbiology, March 1999, p. 1312-1315, Vol. 65, No. 3
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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Copyright © 1999 by the American Society for Microbiology. All rights reserved.