期刊
JOURNAL OF ANTIBIOTICS
卷 64, 期 4, 页码 321-325出版社
JAPAN ANTIBIOTICS RESEARCH ASSOC
DOI: 10.1038/ja.2011.5
关键词
bacterial DNA; ciprofloxacin; flow cytometry; Vybrant DyeCycle Ruby
资金
- FCT, the Portuguese Foundation for Science and Technology [PTDC/EQU-EQU/65492/2006]
- FCT [SFRH/BD/41521/2007]
- Fundação para a Ciência e a Tecnologia [PTDC/EQU-EQU/65492/2006, SFRH/BD/41521/2007] Funding Source: FCT
As common microbiological methods for the assessment of bacteriostatic or bactericidal activities are very time-consuming, in this work we describe that the use of a novel far-red fluorescent stain, Vybrant Dye Cycle Ruby (DCR) for the flow cytometric analysis of fluoroquinolone (ciprofloxacin) bacteriostatic and bactericidal activities in Escherichia coli proved to be specific for bacterial DNA and, after ciprofloxacin exposure, DNA distribution analysis was achieved using a 7.5 mu M DCR concentration to stain 5x10(5) ethanol-fixed bacterial cells. The analysis of the bacterial DNA histograms obtained from the ciprofloxacin concentrations tested, enabled the distinction between ciprofloxacin bacteriostatic and bactericidal activities. The Journal of Antibiotics (2011) 64, 321-325; doi: 10.1038/ja.2011.5; published online 16 February 2011
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