TABLE 3.

Rifampin potentiates the activity of 4,5-linked aminoglycosides against wild-type P. aeruginosa^a

Antimicrobial	MIC (μg/ml)
	−Rifampin	+Rifampin
Paromomycin	256	32
Neomycin	32	4
Ribostamycin	1,024	256
Gentamicin	2	2
Amikacin	2	2
Kanamycin	64	64
Streptomycin	32	32
Erythromycin	512	512
Chloramphenicol	32	16–32
Nalidixic acid	128	128
Carbenicillin	64	32–64

^aThe MICs for the indicated antimicrobials were determined for wild-type P. aeruginosa PAO1 strain K767 in the absence (−) and presence (+) of one-half MIC of rifampin (8 μg/ml).