FIG 2.

Virulence of Argentinean CC30 MRSA major clades. (A) Schematic representation of predicted Ebh and SraP protein sequences and domains in the four clades. (B) Biofilm production by isolates of ARG-1 (N = 2), ARG-2 (N = 5), ARG-3 (N = 10), and ARG-4 (N = 45). Results are represented as final OD for each strain with median value (line) and interquartile range (whiskers) and were compared with Kruskal-Wallis test (P < 0.0001). The horizontal bars show significant differences between individual groups detected by Dunn’s multiple-comparison test. *, P < 0.05; ***, P < 0.001. NRS101 (S. epidermidis NRS101), strong biofilm producer; Δica (S. aureus Newman Δica), ica independent-biofilm producer strain. (C) Lipase activity on Baird-Parker agar plates. For each representative isolate of ARG-2, ARG-3, and ARG-4, 10 μl of 10-fold serial dilutions of a 0.5 McFarland suspension were plated.