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Population analysis of PAO1, PAΔnZ, and PAΔG ceftazidime (CAZ) (A) and imipenem (IMP) (B) susceptibility. Overnight cultures of PAO1, PAΔnZ, or PAΔG were plated on MH agar containing 0, 0.12, 0.25, 0.5, 1, 2, 4, 8, and 16 μg/ml of ceftazidime or imipenem, and the CFU counts were enumerated after 24 h of incubation. The results are shown as mean values of 3 experiments ± standard deviations.
