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Temporal variations in trimethoprim-sulfamethoxazole resistance of Salmonella and Escherichia coli isolates from farm to retail, from 2003 to 2015.
a Significant temporal difference (P ≤ 0.05); level increased between 2003 and 2015. Temporal analysis is unavailable in the Ontario abattoir data due to small sample size.
Grey-shaded areas indicate no surveillance activities.
TMSfeed — trimethoprim-sulfadiazine use in feed.
