Dynamics of Campylobacter in Poultry Production: Research Reveals High Prevalence of Antibiotic Resistance and Hidden Reservoirs

Strategic Insights -

New research on Gram-Negative Bacteria - Campylobacter has shed light on the dynamics of contamination in the poultry production chain, providing crucial insights for improving prevention and control strategies. The study, conducted by a team of researchers from the University of British Columbia, utilized whole-genome sequencing to analyze 324 isolates sampled from a chicken abattoir in the Greater Vancouver area throughout 2020. The findings revealed a highly diverse and dynamic population of Campylobacter, with 27 distinct lineages identified, and a wide range of plasmids characterized.

Key Takeaways:

  • The study utilized whole-genome sequencing to analyze 324 isolates of Campylobacter sampled from a chicken abattoir in the Greater Vancouver area throughout 2020.
  • The analysis revealed a highly diverse and dynamic population of Campylobacter, with 27 distinct lineages identified.
  • A wide range of plasmids was characterized, and a high prevalence of antibiotic resistance was observed among these isolates.
  • Distinct subpopulations were identified in 10 lineages, suggesting that some populations may have diversified within the local agricultural environment.
  • Some lineages were frequently reintroduced to the abattoir, suggesting the potential presence of hidden reservoirs upstream of slaughter.
  • Comparisons between biological and environmental samples suggest a high probability of between-batch cross-contamination.
  • Locally sourced public isolates showed strong genomic correlations with the lineages identified in this study.
  • Two lineages, 1629a and 1629b, were identified to have persisted within the local poultry production ecosystem for several years, explaining their recurrent detection.

Statistics:

  • 324 isolates of Campylobacter were sampled from a chicken abattoir in the Greater Vancouver area throughout 2020.
  • 27 distinct lineages of Campylobacter were identified through whole-genome sequencing.
  • 10 lineages showed distinct subpopulations, suggesting diversified populations within the local agricultural environment.
  • 21 days was the longest period of persistence of Campylobacter in the abattoir environment previously understood.
  • A high prevalence of antibiotic resistance was observed among the isolates, with no clear indication of the extent of this issue.
  • 1529 isolates of Campylobacter 1641a were identified as a region (H and Hc) in western Rockies shared region.

Sources:

  • Longitudinal and cross-sectional sampling and whole genome sequencing of Campylobacter in a chicken abattoir reveal highly dynamic population structure. Applied and Environmental Microbiology, 2025.
  • Applied and Environmental Microbiology can be contacted at: Amer Soc Microbiology, 1752 N St NW, Washington, DC 20036-2904, USA.
  • Kaidi Wang, Food, Nutrition and Health Program, Faculty of Land and Food Systems, University of British Columbia, Vancouver, British Columbia, Canada.