Table 3.

MIC values for individual antibiotics alone (as determined by the broth microdilution method) and in effective synergistic combination with tigecycline (as determined by the chequerboard method) for seven A. baumannii isolates

	MIC (mg/L) a
Study code	TIG	LVX	AMK	IPM	CS	TIG/LVX	TIG/AMK	TIG/IPM	TIG/CS
5	4	16	64	16	0.25	0.25/4	NS	NS	NS
11	4	16	64	16	0.5	0.25/4	1/16	NS	NS
16	8	16	128	16	0.125	2/4	NS	NS	2/0.03
62	4	8	2	2	0.25	NS	NS	0.25/0.5	NS
71	4	8	256	16	0.5	NS	1/64	NS	NS
75	4	16	128	2	0.5	0.25/4	NS	NS	1/0.125
80	4	8	128	32	0.25	NS	NS	0.25/8	NS

^a Breakpoint criteria are provided in Additional file 1.