TABLE 3.

FIC testing of PT plus rifampin against clinical isolates

Strain	MIC (µg · ml−1)				FIC indexa
	Alone		Combination
	PTb	Rifampin	PT	Rifampin
P. aeruginosa
PAO1	0.41	15.6	0.21	1.9	0.634
RW01	0.41	15.6	0.13	1.9	0.439
RW02	0.41	15.6	0.16	1.9	0.512
RW03	0.51	15.6	0.16	3.9	0.564
RW04	0.32	15.6	0.13	1.9	0.528
RW05	0.32	31.25	0.13	1.9	0.467
RW06	0.32	15.6	0.13	1.9	0.528
RW07	0.32	15.6	0.13	1.9	0.528
S. aureus
UAMS-1	2.1	0.01	0.67	0.0015	0.469
1110936	1.6	0.05	0.67	0.0035	0.489
1111063	2.1	0.1	0.67	0.0076	0.395
1071788	1.6	0.01	0.67	0.0015	0.569
1103430c	2.1	0.01	0.67	0.0015	0.469
1094094c	2.1	0.01	0.67	0.0015	0.469
1094140c	2.1	0.01	0.67	0.0015	0.469
1094147	2.1	0.01	0.67	0.0015	0.469
1094166	2.1	0.01	0.67	0.0015	0.469
1094178	2.1	0.1	0.67	0.0076	0.395
1144105c	1.6	0.05	0.67	0.0035	0.489
1097612	2.1	0.05	0.67	0.0035	0.389
1097630	2.1	0.01	0.67	0.0015	0.469
1122181c	2.1	0.01	0.67	0.0015	0.469
1122187c	2.1	0.05	0.67	0.0035	0.389
1122190c	1.6	0.05	0.67	0.0035	0.489
1122197c	2.1	0.01	0.67	0.0015	0.469
1132822c	2.1	0.01	0.67	0.0015	0.469
1101442c	1.6	0.05	0.67	0.0035	0.489
1142776c	2.1	0.01	0.67	0.0015	0.469
1125120c	2.1	0.05	0.67	0.0076	0.471
Vig R	0.65	0.03	0.31	0.0078	0.75

^aFIC, fractional inhibitory concentration.

^bPT, polymyxin B-trimethoprim.

^cMethicillin-resistant Staphylococcus aureus (MRSA).