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Pseudomonas aeruginosa forms biofilms in acute infection independent of cell-to-cell signaling.


ABSTRACT: Biofilms are bacterial communities residing within a polysaccharide matrix that are associated with persistence and antibiotic resistance in chronic infections. We show that the opportunistic pathogen Pseudomonas aeruginosa forms biofilms within 8 h of infection in thermally injured mice, demonstrating that biofilms contribute to bacterial colonization in acute infections as well. Using light, electron, and confocal scanning laser microscopy, P. aeruginosa biofilms were visualized within burned tissue surrounding blood vessels and adipose cells. Although quorum sensing (QS), a bacterial signaling mechanism, coordinates differentiation of biofilms in vitro, wild-type and QS-deficient P. aeruginosa strains formed similar biofilms in vivo. Our findings demonstrate that P. aeruginosa forms biofilms on specific host tissues independently of QS.

SUBMITTER: Schaber JA 

PROVIDER: S-EPMC1952004 | biostudies-literature | 2007 Aug

REPOSITORIES: biostudies-literature

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Pseudomonas aeruginosa forms biofilms in acute infection independent of cell-to-cell signaling.

Schaber J Andy JA   Triffo W Jeffrey WJ   Suh Sang Jin SJ   Oliver Jeffrey W JW   Hastert Mary Catherine MC   Griswold John A JA   Auer Manfred M   Hamood Abdul N AN   Rumbaugh Kendra P KP  

Infection and immunity 20070611 8


Biofilms are bacterial communities residing within a polysaccharide matrix that are associated with persistence and antibiotic resistance in chronic infections. We show that the opportunistic pathogen Pseudomonas aeruginosa forms biofilms within 8 h of infection in thermally injured mice, demonstrating that biofilms contribute to bacterial colonization in acute infections as well. Using light, electron, and confocal scanning laser microscopy, P. aeruginosa biofilms were visualized within burned  ...[more]

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