Table 3.

MexAB-OprM and MexEF-OprN partly contribute to the BrlR-dependent resistance phenotype of P. aeruginosa^a

Strain	MIC (μg/ml)
	Tobramycin	Trimethoprim	Chloramphenicol
PAO1	1.25	12.5	6.25
PAO1/brlR	10	50	50
Fold change	6×	4×	6×
PAO255b	0.3	3.1	2
PAO255/brlR	0.6	6.25	4
Fold change	2×	2×	2×

^aExperiments were carried out in in triplicate.

^bPAO255, ΔmexAB-oprM ΔmexEF-oprN.