TABLE 2.

Results obtained with antibiotic combinations by checkerboard method

Strain no.	RIF-DOX		RIF-SXT		SXT-DOX		SM-DOX		AZM-CIP
	ΣFIC	Activitya	ΣFIC	Activity	ΣFIC	Activity	ΣFIC	Activity	ΣFIC	Activity
1	0.50	S	4.24	A	4	A	2.12	A	0.27	S
2	0.37	S	0.37	S	2.5	A	0.31	S	1.32	I
3	1.03	I	0.56	I	2.5	A	0.18	S	0.12	S
4	0.15	S	0.18	S	0.51	I	0.26	S	0.31	S
5	0.31	S	1.12	I	1.03	I	0.49	S	0.53	I
6	2.06	A	2.50	A	4.03	A	1.03	I	0.02	S
7	1.08	I	2.12	A	1.7	I	0.56	A	0.52	I
8	0.13	S	0.51	I	8.06	A	0.28	S	0.36	S
9	4.03	A	2.25	A	1.08	I	0.75	A	0.12	S
10	0.36	S	2.03	A	0.28	S	1.10	I	0.18	S
11	0.27	S	2.06	A	0.53	I	0.24	S	0.13	S
12	0.62	I	0.57	I	0.31	S	0.56	I	0.62	I
13	1.25	I	0.51	I	0.18	S	0.36	S	4.25	A
14	0.28	S	1.08	I	0.56	I	4.15	A	0.31	S
15	0.31	S	1.12	I	0.28	S	0.62	I	0.04	S
16	0.13	S	0.51	I	5.0	A	4.12	A	2.06	A

^aS, synergy; A, antagonism; I, indifference.