Secreted protease activity.

Protease activity present in the culture media was measured using a fluorescent assay. Strains tested are shown along the x-axis and grouped based on methicillin-sensitivity and isolation source. The indicated strains were grown for 22 hours as biofilm or planktonic cultures. Bars represent the average fluorescence obtained from at least 3 independent plates representing biological replicates; error bars represent the SEM. Media: sterile culture medium. *: Not Detected (Biofilm cultures) ⊕: Not Detected (Planktonic cultures).