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Figure 35. Temporal variation in resistance to selected antimicrobials in Escherichia coli isolates from pork; Retail Meat Surveillance, 2003–2009

ATM British Columbia Saskatchewan Ontario Québec Maritimes
2007 2008 2009 2005 2006 2007 2008 2009 2003 2004 2005 2006 2007 2008 2009 2003 2004 2005 2006 2007 2008 2009 2008 2009
23 44 38 48 49 38 41 29 90 199 179 182 172 155 136 61 107 78 57 64 60 41 17 78
Ampicillin 0.130435 0.227273 0.078947 0.020833 0.061224 0.052632 0.097561 0.103448 0.2 0.231156 0.206704 0.208791 0.232558 0.167742 0.183824 0.196721 0.186916 0.115385 0.192982 0.203125 0.183333 0.195122 0.176471 0.128205
Ceftiofur 0 0.068182 0 0 0 0.026316 0.073171 0.034483 0.011111 0.01005 0.011173 0.005495 0.005814 0.006452 0 0 0.018692 0.025641 0 0 0.033333 0 0 0
Gentamicin 0 0.045455 0.052632 0 0 0 0.02439 0 0.011111 0.030151 0.005587 0.005495 0.005814 0.032258 0.007353 0.016393 0.028037 0.012821 0.035088 0.015625 0.016667 0 0 0.025641
Nalidixic acid 0 0 0 0 0 0 0.02439 0 0 0 0 0 0.005814 0 0 0 0 0 0 0 0.05 0 0 0.012821
Streptomycin 0.130435 0.227273 0.184211 0.166667 0.102041 0.052632 0.146341 0.172414 0.166667 0.261307 0.195531 0.197802 0.209302 0.141935 0.235294 0.278689 0.205607 0.166667 0.192982 0.234375 0.133333 0.170732 0.117647 0.25641
Tetracycline 0.347826 0.454545 0.342105 0.270833 0.306122 0.236842 0.292683 0.344828 0.544444 0.547739 0.486034 0.483516 0.459302 0.380645 0.352941 0.47541 0.364486 0.333333 0.368421 0.453125 0.35 0.268293 0.411765 0.487179
Trimethoprim-sulfamethoxazole 0 0.068182 0.078947 0.020833 0.020408 0.052632 0 0.034483 0.044444 0.065327 0.067039 0.043956 0.046512 0.070968 0.073529 0.098361 0.065421 0.064103 0.070175 0.03125 0.1 0.097561 0.117647 0.076923

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