Influence of the postantibiotic effect and postantibiotic Sub-MICs effect of netilmicin, tobramycin, ciprofloxacin and pefloxacin on alginate production byPseudomonas aeruginosa
1996
The postantibiotic effect (PAE) (postantibiotic phase induced by 2× or 4×MIC) as well as the postantibiotic effect of subinhibitory concentrations (0.1×, 0.2× and 0.3× MIC) (PA SME) of netilmicin, tobramycin, ciprofloxacin and pefloxacin affected the production of the virulence factor alginate by aP. aeruginosa strain. Aminoglycosides and ciprofloxacin at a concentration of 4× MIC inhibited the alginate production more significantly than 2× MIC. Suprainhibitory concentrations of aminoglycosides were more effective than pefloxacin (2× or 4× MIC) and ciprofloxacin (2× MIC). PA SME demonstrated by the above antibiotics (with the exception of ciprofloxacin 2× MIC +00.1× MIC) suppressed alginate production more efficiently.
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