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Infect Immun. 2004 Jun;72(6):3658-63.

Influence of origin of isolates, especially endocarditis isolates, and various genes on biofilm formation by Enterococcus faecalis.

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  • 1Division of Infectious Diseases, Department of Internal Medicine, University of Texas Medical School, Houston, Texas 77030, USA.

Erratum in

  • Infect Immun. 2005 Oct;73(10):7075.


Endocarditis isolates of Enterococcus faecalis produced biofilm significantly more often than nonendocarditis isolates, and 39% of 79 versus 6% of 84 isolates produced strong biofilm (P < 0.0001). esp was not required, but its presence was associated with higher amounts of biofilm (P < 0.001). Mutants disrupted in dltA, efaA, ace, lsa, and six two-component regulatory systems were largely unaltered, while disruptions in epa (encoding enterococcal polysaccharide antigen), atn (encoding an autolysin), gelE (encoding gelatinase), and fsr (encoding the E. faecalis regulator) [corrected] resulted in fewer attached bacteria, as determined using phase-contrast microscopy, and less biofilm (P < 0.0001).

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