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Journal of Bacteriology, February 2009, p. 1349-1354, Vol. 191, No. 4
0021-9193/09/$08.00+0     doi:10.1128/JB.01458-08
Copyright © 2009, American Society for Microbiology. All Rights Reserved.

Pseudomonas aeruginosa PAO1 Pyocin Production Affects Population Dynamics within Mixed-Culture Biofilms{triangledown} ,{dagger}

Richard D. Waite* and Michael A. Curtis

Queen Mary University of London, Barts & The London School of Medicine and Dentistry, Centre for Infectious Disease, Institute of Cell and Molecular Science, 4 Newark Street, London E1 2AT, United Kingdom

Received 16 October 2008/ Accepted 30 November 2008

Transcriptomic and phenotypic studies showed that pyocins are produced in Pseudomonas aeruginosa PAO1 aerobic and anaerobic biofilms. Pyocin activity was found to be high in slow-growing anaerobic biofilms but transient in aerobic biofilms. Biofilm coculture of strain PAO1 and a pyocin-sensitive isolate showed that pyocin production had a significant impact on bacterial population dynamics, particularly under anaerobic conditions.

* Corresponding author. Mailing address: Queen Mary University of London, Barts & The London School of Medicine and Dentistry, Centre for Infectious Disease, Institute of Cell and Molecular Science, 4 Newark Street, London E1 2AT, United Kingdom. Phone: 020 7882 2328. Fax: 020 7882 2181. E-mail: R.D.Waite{at}qmul.ac.uk

{triangledown} Published ahead of print on 5 December 2008.

{dagger} Supplemental material for this article may be found at http://jb.asm.org/.

Journal of Bacteriology, February 2009, p. 1349-1354, Vol. 191, No. 4
0021-9193/09/$08.00+0     doi:10.1128/JB.01458-08
Copyright © 2009, American Society for Microbiology. All Rights Reserved.





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