Table 2.

Percentages of E. coli isolates from broilers in Brazil exhibiting resistance to antibiotics published in scientific literature based on Cardoso et al. (2002), Barros et al. (2012), Bezerra et al. (2016), Pessanha and Filho (2001), Stella et al. (2013), and Korb et al. (2015).

Class	Compound	% res average	% res min	% res max	No. of studies	No. of isolates
Aminoglycosides	Gentamycin	27	26	28	2	244
	Streptomycin	79			1	91
Cephalosporines	Cefalexin	31	0	61	1	35
	Cefepime	10			1	120
	Cefotaxime	23			1	120
	Ceftazidime	3			1	120
	Ceftiofur	43			1	174
	Ceftriaxone	24			1	120
	Cephalothin	65	51	78	2	161
Fosfomycins	Fosfomycin	29	10	45	3	360
Lincosamides	Lincomycin	100	100	100	1	35
Macrolides	Azithromycin	49			1	174
	Erytromycin	97			1	91
Nitrofurans	Nitrofurantoins	13			1	120
Penicillines	Amoxicillin	65	50	84	2	101
	Ampicillin	69	42	87	4	455
Phenicols	Chloramphenicol	52	51	52	2	244
	Thiamphenicol	51	25	77	1	35
Polymyxins	Polymyxin B	1			1	174
Quinolone	Ciprofloxacin	53	14	91	2	294
	Enrofloxacin	40	13	76	2	155
	Nalidixic acid	40	34	45	2	199
	Norfloxacin	59	38	76	2	101
	Oxolinic acid	88			1	66
Tetracyclines	Chlortetracycline	74	63	84	1	35
	Oxitetracycline	81	62	100	1	35
	Tetracycline	67	48	95	4	455
Combination of compounds	Trimethoprim-Sulfamethoxazole	60	27	100	6	556

% res—average value of percentages of antibiotic resistant E. coli found in referenced studies.

% res min—minimal value of percentages of antibiotic resistant E. coli found in referenced studies.

% res max—maximal value of percentages of antibiotic resistant E. coli found in referenced studies.