FIG 3 .

Effect of an agr deficiency on the lethal activity of oxacillin, daptomycin, and exogenous H₂O₂. Wild-type cells (BS12, empty circles) or agr-deficient mutant cells (BS13, filled circles) were grown to late log phase and then treated with the indicated concentrations of oxacillin for 3 h (A), daptomycin for 90 min (B), or H₂O₂ for 60 min (C). Survival was determined as described in the legend to Fig. 1. Growth medium was TSB (oxacillin and H₂O₂) or Ca²⁺-supplemented Mueller-Hinton broth (daptomycin). Data represent the means from biological replicates ± standard deviations (n = 3).