TABLE 1.

Extended-spectrum β-lactamase genotypes of cefotaxime-resistant Escherichia coli isolates from food animals.

bla genotype	Number (%) of cefotaxime-resistant E. coli isolates
	Chicken	Pig	Cattle	Total
	(n = 32)	(n = 41)	(n = 4)	(n = 77)
TEM-1	10 (31.3)	21 (51.2)	0	31 (40.3)
CTX-M groups	32 (100)	40 (97.6)	4 (100)	76 (98.7)
CTX-M group 1	10 (31.3)	33 (80.5)	2 (50.0)	45 (58.4)
CTX-M group 9	21 (65.6)	7 (17.1)	2 (50.0)	30 (39.0)
CTX-M group 1 and group 9	1 (3.1)	0	0	1 (1.3)
CTX-M genotypes	5 (15.6)
CTX-M-1		0	0	5 (6.5)
CTX-M-3	0	1 (2.4)	0	1 (1.3)
CTX-M-15	4 (12.5)	10 (24.4)	1 (25.0)	15 (19.5)
CTX-M-55	1 (3.1)	22 (53.7)	1 (25.0)	24 (31.2)
CTX-M-14	16 (50.0)	4 (9.8)	0	20 (26.0)
CTX-M-65	5 (15.6)	3 (7.3)	2 (50.0)	10 (13.0)
CTX-M-15 and CTX-M-14	1 (3.1)	0	0	1 (1.3)