Longitudinal analysis of differences and similarities in antimicrobial resistance among commensal Escherichia coli isolated from market swine and sows at slaughter in the United States of America, 2013–2019
“…Two cross-sectional studies in north-eastern Thailand that sampled only sows showed high rates of resistance [126,127] consistent with other studies that sampled finisher pigs in the region [80,84,128]. The NARMS programme includes sampling of sows at slaughter [68] and a recent analysis of the data between 2013 and 2019 showed a generally higher prevalence of AMR in E. coli isolated from finisher pigs compared with sows [129]. Such findings contrast with the previously mentioned associations between AMR in sows and their offspring.…”
Section: Resistance In Escherichia Coli Isolated From Pigs In Age Gro...supporting
Antimicrobial resistance (AMR) in Escherichia coli of animal origin presents a threat to human health. Although animals are not the primary source of human infections, humans may be exposed to AMR E. coli of animal origin and their AMR genes through the food chain, direct contact with animals, and via the environment. For this reason, AMR in E. coli from food producing animals is included in most national and international AMR monitoring programmes and is the subject of a large body of research. As pig farming is one of the largest livestock sectors and the one with the highest antimicrobial use, there is considerable interest in the epidemiology of AMR in E. coli of porcine origin. This literature review presents an overview and appraisal of current knowledge of AMR in commensal E. coli of the porcine gastrointestinal tract with a focus on its evolution during the pig lifecycle and the relationship with antimicrobial use. It also presents an overview of the epidemiology of resistance to extended spectrum cephalosporins, fluoroquinolones, and colistin in pig production. The review highlights the widespread nature of AMR in the porcine commensal E. coli population, especially to the most-used classes in pig farming and discusses the complex interplay between age and antimicrobial use during the pig lifecycle.
“…Two cross-sectional studies in north-eastern Thailand that sampled only sows showed high rates of resistance [126,127] consistent with other studies that sampled finisher pigs in the region [80,84,128]. The NARMS programme includes sampling of sows at slaughter [68] and a recent analysis of the data between 2013 and 2019 showed a generally higher prevalence of AMR in E. coli isolated from finisher pigs compared with sows [129]. Such findings contrast with the previously mentioned associations between AMR in sows and their offspring.…”
Section: Resistance In Escherichia Coli Isolated From Pigs In Age Gro...supporting
Antimicrobial resistance (AMR) in Escherichia coli of animal origin presents a threat to human health. Although animals are not the primary source of human infections, humans may be exposed to AMR E. coli of animal origin and their AMR genes through the food chain, direct contact with animals, and via the environment. For this reason, AMR in E. coli from food producing animals is included in most national and international AMR monitoring programmes and is the subject of a large body of research. As pig farming is one of the largest livestock sectors and the one with the highest antimicrobial use, there is considerable interest in the epidemiology of AMR in E. coli of porcine origin. This literature review presents an overview and appraisal of current knowledge of AMR in commensal E. coli of the porcine gastrointestinal tract with a focus on its evolution during the pig lifecycle and the relationship with antimicrobial use. It also presents an overview of the epidemiology of resistance to extended spectrum cephalosporins, fluoroquinolones, and colistin in pig production. The review highlights the widespread nature of AMR in the porcine commensal E. coli population, especially to the most-used classes in pig farming and discusses the complex interplay between age and antimicrobial use during the pig lifecycle.
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