Infectious Diseases 2021

Infectious Diseases 2021

Reduction in antimicrobial use in broilers, Canada, 2013-2019

Emerging Infectious Diseases Vol 27, Number 9 - September 2021 9 August, 2021

A recent study provides data on antimicrobial use and AMR of foodborne bacteria (Salmonella, Escherichia coli, and Campylobacter) in broiler chickens during 2013 and 2019. Antimicrobial resistance (AMR) in broiler chickens declined by 6%–38% after the decrease in prophylactic antimicrobial use. However, the withdrawal of individual compounds, such as cephalosporins and fluoroquinolones, prompted an increase in use of and resistance levels for other drug classes, such as aminoglycosides.
The study shows that the injection of antimicrobials in ovo or subcutaneously at hatcheries is significantly associated with resistance in foodborne bacteria on the farm. 
Canada’s experience with antimicrobial use reduction illustrates the potential for progressive transitions from conventional antimicrobial-dependent broiler production to more sustainable production with respect to antimicrobial use.