Table 2.

Number (N) of Escherichia coli isolates from chicken carcasses (slaughter) and chicken meat (retail) between 2004 and 2012 and the prevalence of resistance to 16 antimicrobials.

			Prevalence of resistance (%)*
Source	Year	N	AMC	AMP	AXO	FOX	TIO	AMI	GEN	KAN	STR	COT	FIS	CIP	NAL	TET	AZI	CHL
Slaughter	2004	1697	8.8	17.6	7.2	8.2	4.9	0	39.1	11.5	64.1	10.7	53.2	0.2	6.8	50.3	NT	1
	2005	2232	10.6	22	9	9.9	6.5	0	36.7	10.3	58.1	10.4	51.9	0.5	7.5	48.9	NT	1
	2006	1357	16	25.6	14.7	15	10.2	0	33.1	9.1	49.5	8.4	48.6	0.1	5.4	49	NT	1.9
	2007	1510	11.2	18.7	10.3	10.3	7	0	38	7.7	47	7.9	NT	0.1	4.2	40.2	NT	2.3
	2008	986	13.7	23.5	13.5	13.8	10.4	0	44.5	10.2	54.6	9.1	52.7	0.6	6	47.4	NT	1
	2009	876	12.4	19.9	11.5	11.4	9.5	0	43.4	7.9	49.9	7	52.6	0.5	3.2	49.2	NT	1.1
	2010	941	12.4	22.2	12.3	12.5	10	0	43	6.4	49.1	6.3	51.8	0.2	3.4	42.8	NT	0.7
	2011	614	9.4	16	9.3	9.1	6.8	NT	42.8	5.7	50.8	4.2	54.7	0.3	2.3	46.6	0.2	2.1
	2012	990	9	17.7	8.8	9.2	7.6	NT	42.1	7.3	42.8	6.5	47.6	0.5	2.4	45.4	0.5	1.9
Retail	2004	400	10	17	6.5	8.2	5.8	0	30	6.8	56.8	4.2	41.2	0	7	48	NT	1.8
	2005	393	12.2	24.7	10.2	11.2	8.7	0	37.7	7.1	50.6	7.4	48.1	0	6.6	46.6	NT	0.5
	2006	418	11.5	20.1	9.1	11.2	8.6	0	37.3	11.5	48.1	8.9	46.9	0	5	50.5	NT	2.6
	2007	299	7.4	18.1	6.4	7.4	6	0	34.4	9	46.8	5	42.1	0	3	40.5	NT	2
	2008	306	11.8	23.5	11.1	11.8	10.8	0	34	6.9	43.8	3.6	39.2	0	2.9	43.8	NT	1
	2009	315	13.3	22.3	12.4	13.3	11.7	0	34.3	5.4	38.1	2.2	40.6	0.3	2.9	41.6	NT	0.6
	2010	357	6.7	16.5	6.4	6.7	5.6	0	31.9	6.2	39.2	4.2	38.9	0.6	3.6	38.9	NT	1.4
	2011	341	14.1	26.4	12.6	13.2	12.3	NT	38.4	5.6	43.4	2.3	44.3	0	2.3	40.8	0	1.2
	2012	386	7.8	15.8	7.8	7.8	7.5	NT	30.6	5.7	39.6	2.6	37.8	0	1.8	39.4	0	0.3

Drug name abbreviations are given in Table 1.

^*NT indicates that the antimicrobial was not tested in that year and/or source.