FIG. 4.

Bactericidal activity of vancomycin in vitro. Concentrations of vancomycin ranging from 0.06 μg/ml (1/4 of the MIC) to 2.5 μg/ml (10× the MIC) were tested. □, data for untreated controls (C). Experiments were performed in triplicate, and results are expressed as means ± SDs.