TABLE 4.

Interaction of individual phenolic constituents of PRMSE

Bacterial strain and phenolic constituent	FIC			FICIa
	Gallic acid	Catechol	Catechaldehyde	Gallic acid	Catechol	Catechaldehyde
E. coli CFT073
Catechol	0.13	NAb		0.25*	NA
Catechaldehyde	0.25	0.25	NA	0.5*	0.5*	NA
Syringaldehyde	0.5	0.25	0.25	0.75	0.31*	0.31*
P. mirabilis HI4320
Catechol	0.13	NA		0.37*	NA
Catechaldehyde	0.13	0.25	NA	0.37*	0.5*	NA
Syringaldehyde	0.5	0.25	0.25	1	0.75	0.75
P. aeruginosa PAO1
Catechol	0.25	NA		0.5*	NA
Catechaldehyde	0.13	0.25	NA	0.37*	0.37*	NA
Syringaldehyde	0.5	0.25	0.25	1	0.5*	0.5*
P. aeruginosa PA14
Catechol	0.25	NA		0.37*	NA
Catechaldehyde	0.25	0.25	NA	0.5*	0.5*	NA
Syringaldehyde	0.13	0.5	0.5	0.63	1	1

^aAsterisks indicate values that represent synergistic interaction.

^bNA, not applicable.