The long-term effects of organic acid supplementation on the development of antimicrobial resistance in gut microbiota in poultry production

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5/5/20261 min read

The long-term effects of acid supplementation on the development of antimicrobial resistance (AMR) in gut microbiota of poultry are an area of emerging research. Acidifiers, such as organic acids, are commonly used as alternatives to antibiotics to promote gut health and improve growth performance (Kiarie et al., 2015). Studies suggest that organic acids can modulate microbial populations, potentially reducing pathogenic bacteria without exerting strong selective pressure associated with antibiotics (Gao et al., 2017). However, concerns remain that continuous acid supplementation may influence the resistance gene pool within gut microbiota over time. Some evidence indicates that acidification can alter microbial diversity and gene expression, potentially impacting horizontal gene transfer mechanisms (Kong et al., 2019). Despite their non-antibiotic nature, acids may indirectly select for resistant strains by creating environmental conditions favoring resistant bacteria (Liu et al., 2020). Long-term studies are limited, but existing data imply that persistent use of acidifiers does not significantly increase resistance gene prevalence in gut microbiota compared to antibiotic use (Zhang et al., 2018). Furthermore, acid supplementation may help mitigate the emergence of AMR by maintaining gut integrity and reducing pathogen load, thereby decreasing the need for antibiotic interventions (Kiarie et al., 2015). Nevertheless, the risk of resistance development through indirect mechanisms warrants cautious application and further investigation. Overall, acidifiers appear to have a lower propensity for fostering AMR development than traditional antibiotics, but their long-term impacts require comprehensive evaluation (Gao et al., 2017). Implementing integrated strategies that combine acid use with other management practices could help minimize resistance risks while promoting animal health. Continued surveillance and molecular studies are essential to understand the potential for resistance gene dissemination within poultry gut microbiota (Liu et al., 2020).

Promois International (www.promoisinternational.com) is one of the best-known manufacturers of encapsulated organic acids.