Comparison of the prevalence of bacterial enteropathogens, potentially zoonotic bacteria and bacterial resistance to antimicrobials in organic and conventional poultry, swine and beef production: a systematic review and meta-analysis

Young, I and Rajic, A and Wilhelm, B J and Waddell, L and Parker, S and McEwen, S A

Epidemiology and Infection (2009) 137: 1217–1232

DOI: 10.1017/s0950268809002635

Abstract

The prevalences of zoonotic and potentially zoonotic bacteria or bacteria resistant to antimicrobials in organic and conventional poultry, swine and beef production were compared using systematic review and meta-analysis methodology. Thirty-eight articles were included in the review. The prevalence of Campylobacter was higher in organic broiler chickens at slaughter, but no difference in prevalence was observed in retail chicken. Campylobacter isolates from conventional retail chicken were more likely to be ciprofloxacin-resistant (odds ratio 9.62, 95% confidence interval 5.67-16.35). Bacteria isolated from conventional animal production exhibited a higher prevalence of resistance to antimicrobials; however, the recovery of some resistant strains was also identified in organic animal production, where there is an apparent reduced antimicrobial selection pressure. Limited or inconsistent research was identified in studies examining the prevalence of zoonotic and potentially zoonotic bacteria in other food-animal species. There is a need for further research of sufficient quality in this area.

Citation

Young, I., Rajic, A., Wilhelm, B. J., Waddell, L., Parker, S., & McEwen, S. A. (2009). Comparison of the prevalence of bacterial enteropathogens, potentially zoonotic bacteria and bacterial resistance to antimicrobials in organic and conventional poultry, swine and beef production: a systematic review and meta-analysis. Epidemiology and Infection, 137(9), 1217–1232. https://doi.org/10.1017/s0950268809002635 Animals, Humans, Chickens, Swine, Cattle, Pigs, Poultry, Prevalence, Bacterial, Chickens/microbiology, Food Microbiology, Colony Count, Microbial, Drug Resistance, Multiple, Domestic/microbiology, Campylobacter/drug effects/isolation & purification, Enterobacteriaceae/drug effects/isolation & purification, Food Industry, Health Food/microbiology, Sus scrofa/microbiology, Turkeys, Turkeys/microbiology

Keywords

• Animals
• Humans
• Chickens
• Swine
• Cattle
• Pigs
• Poultry
• Prevalence
• Bacterial
• Chickens/microbiology
• Food Microbiology
• Colony Count
• Microbial
• Drug Resistance
• Multiple
• Domestic/microbiology
• Campylobacter/drug effects/isolation & purification
• Enterobacteriaceae/drug effects/isolation & purification
• Food Industry
• Health Food/microbiology
• Sus scrofa/microbiology
• Turkeys
• Turkeys/microbiology