期刊
JOURNAL OF ANTIMICROBIAL CHEMOTHERAPY
卷 59, 期 2, 页码 301-304出版社
OXFORD UNIV PRESS
DOI: 10.1093/jac/dkl482
关键词
S. pneumoniae; minimum biofilm inhibitory concentrations; CF
Objectives: To compare the capability of biofilm development between Streptococcus pneumoniae isolates from cystic fibrosis (CF) respiratory samples and those from non-CF blood cultures. Antibiotic susceptibility of biofilm-forming isolates, as well as differences between antibiotic susceptibility of sessile cells [minimum biofilm inhibitory concentration (MBIC)] and their planktonic counterparts (conventional MIC), were also assessed. Methods: Biofilm formation was performed using a microtitre method in 20 CF and 22 non-CF blood culture S. pneumoniae isolates. Results and conclusions: Biofilm formation occurs more frequently among S. pneumoniae isolates from CF (80%) than among non-CF blood culture isolates (50%) (P = 0.04). Moreover MBICs were significantly higher than conventional planktonic MICs among CF but not among non-CF blood isolates, suggesting a high adaptability of CF strains to form biofilms in adverse conditions.
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