FIG. 3.

Release of [³H]N-acetylglucosamine from the cell wall of S. aureus during incubation in the absence (○) or presence of different antibiotics at a concentration of 20× the MIC (for abbreviations see the legend to Fig. 1). At various time points samples were collected from the bacterial cultures and the release of labeled cell wall was measured by scintillation counting. The release is depicted as a percentage of the total amount of label present in each sample. Data are expressed as means ± SEMs for three experiments. ○, control; ■, imipenem; ▴, flucloxacillin; •, cefamandole; □, erythromycin; ▵, clindamycin; ∗, gentamicin.