TABLE 2.

MICs of rifabutin in combination with clarithromycin and tigecycline

Strain	Median MIC (mg/liter)a
	Rifabutin + clarithromycin					Rifabutin + tigecycline
	Alone		In combination			Alone		In combination
	RFB	CLR	RFB	CLR	FICI	RFB	TGC	RFB	TGC	FICI
ATCC 19977	6.3	0.2	1.6	0.05	0.5	6.3	0.8	1.6	0.4	0.75
Strain 1	6.3	0.4	1.6	0.1	0.5	6.3	1.6	1.6	0.4	0.5
Strain 2	6.3	0.2	1.6	0.05	0.5	6.3	0.8	1.6	0.4	0.75
Strain 3	6.3	0.4	1.6	0.2	0.75	6.3	0.8	3.1	0.2	0.75
Strain 4	6.3	0.4	1.6	0.2	0.75	6.3	0.8	1.6	0.2	0.5
Strain 5	6.3	0.4	1.6	0.1	0.5	6.3	0.8	1.6	0.2	0.5
Strain 6	6.3	0.4	0.8	0.2	0.63	6.3	1.6	1.6	0.8	0.75

^aRFB, rifabutin; CLR, clarithromycin; TGC, tigecycline. Values are the medians of three experiments.