Figure 3

Effect of HAM on biofilm susceptibility of S. aureus strains belonging to different agr groups.
Biofilms were exposed to HAM or VAN alone or a combination of VAN and HAM (COMB). Cell viability was quantified by CTB staining and signals are presented as percentages (average ± s.d.) compared to the signal of an untreated biofilm. *significantly different signals were observed between cells exposed to VAN alone and exposed to a combination of VAN and HAM (n ≥ 9; one-way; p < 0.01).