TABLE 3.

MICs of carbenicillin against P. aeruginosa PAO1 in the presence of different concentrations of Mg²⁺

Compound (concn)	MIC (μg/ml) of carbenicillin at Mg2+ concn (mM) of:
	0	1	3	5	10
None	64	64	64	64	64
Spermidine (20 mM)	4	8	16	16	16
Spermine (1 mM)	4	8	16	16	16
Putrescine (20 mM)	16	32	32	32	32
Cadaverine (20 mM)	16	32	32	32	32
EDTA (1 mM)	4	32	64	64	64
PMBN (1 μg/ml)	2	16	64	64	64