TABLE 5.

In vitro MICs of various antibiotics against efflux-deficient P. aeruginosa strain MB5890 in the presence of various concentrations of PMBN

Antibiotic	MIC (μg/ml) at PMBN concn (μg/ml) shown
	0	0.26	0.66	1.6	4.1	10.2	25.6	64
Clindamycin	8	8	8	2	2	2	NGa	NG
Linezolid	4	4	4	2	2	2	NG	NG
Imipenem	2	2	1	0.5	0.5	0.5	NG	NG
Vancomycin	>256	>256	>256	128	128	64	NG	NG
Colistin	0.5	0.5	0.25	0.25	0.25	0.125	NG	NG
Rifampin	32	32	16	0.031	0.031	0.016	NG	NG
Tetracycline	0.25	0.25	0.25	0.125	0.125	0.125	NG	NG
Ciprofloxacin	0.004	0.004	0.004	0.002	0.002	0.002	NG	NG
Novobiocin	64	64	64	16	1	1	NG	NG
Carbenicillin	4	4	4	0.5	0.25	0.25	NG	NG
Fusidic acid	64	64	64	8	8	1	NG	NG
Azithromycin	8	8	8	0.5	0.5	0.25	NG	NG
Gentamicin	0.5	0.5	0.5	0.25	0.25	0.25	NG	NG

^aNG, no growth.