Colistin Resistance in Escherichia coli and Salmonella enterica Strains Isolated from Swine in Brazil

Table 3

Distribution of colistin resistant strains among different Salmonella enterica serotypes isolated from swine.

Serotype	Strains	Number of resistant strains
	No (%)	Agar dilution test	Disk diffusion test
S. Typhimurium	81 (65.3)	12	2
S. London	13 (10.5)	6	0
S. Anatum	11 (8.9)	3	0
S. enterica subsp. enterica (O:4,5:-:1,2)	8 (6.5)	4	3
S. Choleraesuis	7 (5.6)	0	0
S. Infantis	3 (2.4)	0	0
S. Bredeney	1 (0.8)	1	0
Total	124	26	5