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Applied and Environmental Microbiology, January 2006, p. 956-959, Vol. 72, No. 1
0099-2240/06/$08.00+0     doi:10.1128/AEM.72.1.956-959.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

Emergence of Biofilm-Forming Subpopulations upon Exposure of Escherichia coli to Environmental Bacteriophages

Andrea Lacqua,1,2 Oskar Wanner,2 Teresa Colangelo,2 Maria Giovanna Martinotti,1 and Paolo Landini2,3*

Department of Chemical, Food, Pharmaceutical and Pharmacological Sciences, University of Eastern Piedmont, A. Avogadro, Via Bovio 6, Novara 28100, Italy,1 Swiss Federal Institute for Environmental Science and Technology (EAWAG), Ueberlandstrasse 133, 8600 Dübendorf, Switzerland,2 Department of Biomolecular Sciences and Biotechnology, University of Milan, Via Celoria 26, 20100 Milan, Italy3

Received 25 August 2005/ Accepted 21 October 2005

Exposure of Escherichia coli MG1655 to environmental bacteriophages results in rapid selection for phage-tolerant subpopulations displaying increased biofilm formation. Analysis of one phage-tolerant strain revealed large amounts of the DNA-binding Dps protein in the outer membrane protein and production of fimbria-like structures. In dps and fimA mutant derivatives of MG1655, no selection of phage-tolerant bacteria upon exposure to bacteriophages occurred, suggesting a role for Dps and type I pili in bacteriophage tolerance.

* Corresponding author. Mailing address: Department of Biomolecular Sciences and Biotechnology, University of Milan, Via Celoria 26, 20133 Milan, Italy. Phone: 39-02-50315028. Fax: 39-02-50315044. E-mail: paolo.landini{at}unimi.it

Applied and Environmental Microbiology, January 2006, p. 956-959, Vol. 72, No. 1
0099-2240/06/$08.00+0     doi:10.1128/AEM.72.1.956-959.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

  • Gualdi, L., Tagliabue, L., Landini, P. (2007). Biofilm Formation-Gene Expression Relay System in Escherichia coli: Modulation of {sigma}S-Dependent Gene Expression by the CsgD Regulatory Protein via {sigma}S Protein Stabilization. J. Bacteriol. 189: 8034-8043 [Abstract] [Full Text]  


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