Synergy between BPEI
and ampicillin against MRSA 43300 (A), MRSA
OU6 (B), and MRSA OU11 (C). Checkerboard assay data on planktonic
bacteria are shown on the left (Ai, Bi, and Ci), and corresponding
biofilm data are shown on the right (Aii, Bii, and Cii).