Fig. 1. Time–kill curves of imipenem and meropenem against P. aeruginosa (A) A1701DS, (B) B1707∆oprD, (C) F1709pump↑, (D) B1605∆oprD/pump↑/IMPstrains. Number of bacterial colony forming units are presented to the detection limit (102 CFU/mL). Black circle and black solid line, no antibiotics treated; gray circle and gray solid line, 1×MIC; and open circle and black broken line, 4×MIC.