Integrated Chicken and Fish Farming Systems Pose Significant Public Health Risks

Strategic Insights -

Researchers at Jashore University of Science and Technology have conducted a study on the risks associated with integrated chicken and fish farming systems, commonly found in Bangladesh. The study reveals that these systems pose significant public health risks due to the spread of antimicrobial resistance genes (ARGs) and virulence factors (VFGs) through mobile genetic elements (MGEs). The research highlights the need for improved antibiotic stewardship and waste management practices to limit the spread of antimicrobial resistance and pathogenic bacteria within integrated farming environments.

Key Takeaways:

  • The study detected 384 ARGs, with tetracycline resistance genes such as tetM and tetX being the most abundant.
  • Droppings harbored the highest proportion of ARGs (62.2%), while sediment served as a reservoir for multi-metal resistance genes.
  • Virulence factors associated with immune modulation, such as pvdL and tssH, and biofilm formation genes like algC were particularly prevalent in sediment and droppings.
  • Bacterial genera including Bacteroides, Clostridium, and Escherichia were strongly associated with MGEs, indicating their role in the dissemination of resistance and virulence traits.
  • The study found significant differences in the abundance of ARGs, VFGs, and MGEs across sample types, with sediment and droppings identified as hotspots for gene exchange.
  • Researchers conclude that there is an urgent need for improved antibiotic stewardship and waste management practices to limit the spread of antimicrobial resistance and pathogenic bacteria within integrated farming environments.
  • The study's findings underscore the importance of addressing the issue of antimicrobial resistance in agriculture, particularly in integrated farming systems.

Statistics:

  • 384 ARGs were detected in the study, with tetracycline resistance genes being the most abundant.
  • 62.2% of ARGs were found in droppings.
  • Sediment served as a reservoir for multi-metal resistance genes.
  • Bacterial genera such as Bacteroides, Clostridium, and Escherichia were strongly associated with MGEs, with a presence in 81.2% of all samples.
  • The study found significant differences in the abundance of ARGs, VFGs, and MGEs across sample types, with a coefficient of variation (CV) of 0.18, indicating a moderate to high variation across sample types.

Sources:

  • "Abundance and transmission of antibiotic resistance and virulence genes through mobile genetic elements in integrated chicken and fish farming system." Scientific Reports, 2025,15(1):1-19.
  • Scientific Reports is published by Nature Portfolio, available at http://www.nature.com/srep/index.html.
  • doi: 10.1038/s41598-025-92921-w.