Abstract
The effect of ciprofloxacin on eight strains of Staphylococcus aureus were examined. A post-antibiotic effect was observed in all strains, varying between 1.65 and 2.75 hours, with concentration of ciprofloxacin at 5 times the Minimum Inhibitory Concentration (MIC) exposed for 1 hours. Killing-kinetic studies at 5 times the MIC showed a decrease in the numbers of organisms by approximately 2.1 log10 after 6 hours, independent of the growth phase. A significantly increased susceptibility of S. aureus to the bactericidal activity of ciprofloxacin during recovery from the PAE-phase was demonstrated.