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Journal of Bacteriology, May 2005, p. 3551-3555, Vol. 187, No. 10
0021-9193/05/$08.00+0     doi:10.1128/JB.187.10.3551-3555.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

Virulence and the Environment: a Novel Role for Vibrio cholerae Toxin-Coregulated Pili in Biofilm Formation on Chitin

Gemma Reguera* and Roberto Kolter

Department of Microbiology and Molecular Genetics, Harvard Medical School, 200 Longwood Avenue, Boston, Massachusetts 02115

Received 28 November 2004/ Accepted 28 January 2005

The toxin-coregulated pilus (TCP) of Vibrio cholerae is required for intestinal colonization and cholera toxin acquisition. Here we report that TCP mediates bacterial interactions required for biofilm differentiation on chitinaceous surfaces. We also show that undifferentiated TCP biofilms have reduced ecological fitness and, thus, that chitin colonization may represent an ecological setting outside the host in which selection for a host colonization factor may take place.


* Corresponding author. Present address: Department of Microbiology, 203 Morrill Science Ctr. IV-N, University of Massachusetts, Amherst, MA 01003. Phone: (413) 577-1745. Fax: (413) 545-1578. E-mail: greguera{at}microbio.umass.edu.


Journal of Bacteriology, May 2005, p. 3551-3555, Vol. 187, No. 10
0021-9193/05/$08.00+0     doi:10.1128/JB.187.10.3551-3555.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.




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