Journal
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
Volume 54, Issue 6, Pages 2707-2711Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/AAC.01565-09
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Funding
- National Natural Science Foundation of China [30572366]
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Biofilm formation in Staphylococcus epidermidis is mediated by icaADBC-dependent and -independent pathways. Subinhibitory concentrations of erythromycin, azithromycin, and clarithromycin enhanced, in a dose-dependent manner, the level of biofilm formation by 20% (21/105 isolates) by macrolide-resistant ica-positive and -negative isolates tested in vitro. The presence of ica, however, apparently produced an enhanced effect on biofilm formation. The levels of expression of the biofilm-related genes icaA, atlE, fruA, pyrR, sarA, and sigB were increased in response to erythromycin. The results likely underscore the potential clinical relevance of macrolide-induced biofilm growth.
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