Table 1. Minimal inhibitory concentrations (MICs) of different antibiotics against wild type (PAO), PAO-SCV and one selected pseudo-revertant (REV).

Antibiotic	PAO	PAO-SCV	REV
Piperacillin	8	8	8
Cefotaxime	16	32	16
Ceftazidime	4	4	4
Imipenem	8	8	< = 1
Meropenem	4	2	0.5
Gentamicin	< = 1	>16	8
Ciprofloxacin	<0.25	<0.25	<0.25
Levofloxacin	1	0.5	1