Killing curves of P. aeruginosa SM21 and TKP011 in the presence of carbapenems. Assuming that the survival at zero time was 100% (1 × 109 to 2 × 109 CFU/ml), the number of CFU was changed to a percentage. Samples were incubated in the presence of imipenem at 16 μg/ml, panipenem at 8 μg/ml, or meropenem at 12 μg/ml for 5 h. After that, the number of CFU were counted. [], SM21; [▪ ▪ ▪ ▪□▪ ▪ ▪ ▪], TKP011.