FIG. 7.
Susceptibility of S. aureus biofilm development to treatment with exogenous V8 protease. (A) Biofilm development by the MRSA isolate BH1CC grown in BHI and BHI-glucose media with or without exogenous V8 protease (5 units/ml). (B) Biofilm development by the laboratory MSSA strain RN4220 grown in BHI, BHI-NaCl, and BHI-glucose media with or without exogenous V8 protease (5 units/ml). (C) Biofilm development by MRSA isolates DAR217 (CC5), DAR22 (CC5), DAR35 (CC8), BH4 (CC8), BH10 (CC22), DAR113 (CC22), DAR141 (CC30), DAR199 (CC30), and DAR70 (CC45) grown in BHI-glucose medium with or without exogenous V8 protease (5 units/ml). Biofilm formation was measured at least three times, and standard deviations, which were less than 20%, are indicated.