Table 2. Prevalence of antimicrobial drug resistance in Escherichia coli isolates by site and isolates source.

Site	Source	Trimethoprim-sulfamethoxazole*	Tetracycline	Cephalothin	Ceftiofur	Ampicillin	Rifampin	Amoxicillin	Azithromycin	Chloramphenicol
Control
n = 11	Bird	1 (9.1%)	0 (0%)	0 (0%)	0 (0%)	0 (0%)	1 (9.1%)	0 (0%)	0 (0%)	0 (0%)
n = 3	Env	0 (0%)	0 (0%)	0 (0%)	0 (0%)	0 (0%)	3 (100%)	0 (0%)	0 (0%)	0 (0%)
n = 14	Total	1 (7.1%)	0 (0%)	0 (0%)	0 (0%)	0 (0%)	4 (28.6%)	0 (0%)	0 (0%)	0 (0%)
Dairy
n = 16	Bird	0 (0%)	2 (12.5%)	1 (6.3%)	0 (0%)	2 (12.5%)	3 (18.8%)	0 (0%)	0 (0%)	1 (6.3%)
n = 16	Env	2 (12.5%)	4 (25%)	2 (12.5%)	1 (6.3%)	3 (18.8%)	7 (43.8%)	1 (6.3%)	0 (0%)	3 (18.8%)
n = 32	Total	2 (6.3%)	6 (18.8%)	3 (9.4%)	1 (3.1%)	5 (15.6%)	10 (31.3%)	1 (3.1%)	0 (0%)	4 (12.5%)
Beef A
n = 11	Bird	0 (0%)	0 (0%)	0 (0%)	0 (0%)	0 (0%)	0 (0%)	0 (0%)	0 (0%)	0 (0%)
n = 27	Env	0 (0%)	3 (11.1%)	0 (0%)	0 (0%)	0 (0%)	6 (22.2%)	0 (0%)	0 (0%)	0 (0%)
n = 38	Total	0 (0%)	3 (7.9%)	0 (0%)	0 (0%)	0 (0%)	6 (15.8%)	0 (0%)	0 (0%)	0 (0%)
Beef B
n = 5	Bird	0 (0%)	0 (0%)	0 (0%)	0 (0%)	0 (0%)	1 (20%)	0 (0%)	0 (0%)	0 (0%)
n = 22	Env	1 (4.5%)	6 (27.3%)	0 (0%)	0 (0%)	0 (0%)	10 (45.5%)	0 (0%)	0 (0%)	0 (0%)
n = 27	Total	1 (3.7%)	6 (22.2%)	0 (0%)	0 (0%)	0 (0%)	11 (40.7%)	0 (0%)	0 (0%)	0 (0%)
All (N = 111)		4 (3.6%)	15 (13.5%)	3 (2.7%)	1 (0.9%)	5 (4.5%)	31 (27.9%)	1 (0.9%)	0 (0.0%)	4 (3.6%)

Note:

^*All columns show number resistant (% of n for each row).