Table 3. Ciprofloxacin resistant strains of P. aeruginosa used in this study and MICs of the four antibiotics selected as markers for Beta-lactams [Imipenem (IMI) & Cefepime (CEF)], Fluoroquinolones [Ciprofloxacin (CIP)] and Aminoglycosides [Gentamicin (GEN)] tested in the absence or in the presence of the efflux inhibitor CCCP.

Strains	MIC (mg/L)
	IMI		CEF		CIP		GEN
	-CCCP	+CCCP	-CCCP	+CCCP	-CCCP	+CCCP	-CCCP	+CCCP
208	256	4	1,024	0.5	128	0.5	4	2
209	128	4	1,024	0.5	128	0.5	1,024	1
211	256	4	1,024	0.5	128	0.5	1,024	1
212	256	2	1,024	0.5	128	0.5	1,024	1
215	256	8	1,024	8	128	0.5	1,024	1
322	128	128	1,024	0	128	0.5	32	1
477	256	4	512	512	8	0.5	256	128
481	32	8	64	32	16	2	1,024	512
483	32	8	64	64	16	1	1,024	512
488	128	8	64	32	16	0.5	128	64
517	256	128	1,024	512	8	0.5	256	256
520	256	128	1,024	1,024	16	0.5	256	256
529	128	64	512	256	16	0.5	128	16
538	256	256	1,024	512	16	0.5	256	128
539	64	4	512	256	16	0.5	128	128
599	128	64	1,024	64	16	0.5	128	64
PAO1	2	2	0.5	0.5	1	1	2	2

-CCCP, in the absence of carbonyl cyanide-m-chlorophenylhydrazone; +CCCP, in the presence of carbonyl cyanide-m-chlorophenylhydrazone.