Table 3. Distribution of the susceptibility profile to seven antimicrobials for the 147 B. abortus strains isolated from cattle in Brazil, 1977–2009, according to the year of isolation.

Isolation Year / Antimicrobial	Ciprofloxacin		Doxicicline		Streptomycin		Gentamicin		Ofloxacin		Rifampin			Trimethoprim-sulfamethoxazole		Total
	S a	R b	S	R	S	R	S	R	S	R	S	I c	R	S	R
1977	3	-	3	-	3	-	3	-	3	-	1	2	-	3	-	3
1996	1	-	1	-	1	-	1	-	1	-	-	1	-	1	-	1
2002	5	-	5	-	5	-	5	-	5	-	3	2	-	5	-	5
2003	3	-	3	-	3	-	3	-	3	-	1	2	-	3	-	3
2004	8	-	8	-	8	-	7	1	8	-	5	3	-	8	-	8
2005	1	-	1	-	1	-	-	1	1	-	-	1	-	1	-	1
2006	26	1	27	-	26	1	26	1	27	-	18	8	1	26	1	27
2007	13	-	13	-	13	-	12	1	13	-	7	6	-	13	-	13
2008	48	-	48	-	48	-	47	1	48	-	38	9	1	48	-	48
NK d	38	-	38	-	37	1	38	-	38	-	17	20	1	37	1	38
Total	146	1	147	0	145	2	142	5	147	0	90	54	3	145	2	147

^a Suceptible

^b Resistant

^c Intermediate

^d Not known