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How micro-/nano-plastics influence the horizontal transfer of antibiotic resistance genes - A review
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This review examines how micro- and nanoplastics help spread antibiotic resistance genes between bacteria -- a major global health threat. The tiny plastic particles can act as platforms where bacteria exchange DNA carrying drug-resistance instructions, potentially making infections harder to treat. The effect depends on the type, size, and concentration of plastics, and has been documented in sewage, livestock farms, and landfills.
Plastic debris such as microplastics (MPs) and nanoplastics (NPTs), along with antibiotic resistance genes (ARGs), are pervasive in the environment and are recognized as significant global health and ecological concerns. Micro-/nano-plastics (MNPs) have been demonstrated to favor the spread of ARGs by enhancing the frequency of horizontal gene transfer (HGT) through various pathways. This paper comprehensively and systematically reviews the current study with focus on the influence of plastics on the HGT of ARGs. The critical role of MNPs in the HGT of ARGs has been well illustrated in sewage sludge, livestock farms, constructed wetlands and landfill leachate. A summary of the performed HGT assay and the underlying mechanism of plastic-mediated transfer of ARGs is presented in the paper. MNPs could facilitate or inhibit HGT of ARGs, and their effects depend on the type, size, and concentration. This review provides a comprehensive insight into the effects of MNPs on the HGT of ARGs, and offers suggestions for further study. Further research should attempt to develop a standard HGT assay and focus on investigating the impact of different plastics, including the oligomers they released, under real environmental conditions on the HGT of ARGs.
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This review examines how micro- and nanoplastics act as vectors for antibiotic resistance genes, facilitating their spread through environmental and biological systems by creating selective pressure and hosting microbial communities that exchange resistance determinants.
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This review summarizes existing research on tiny plastic particles (microplastics) in environments like wastewater, rivers, and farms, finding they can host bacteria that carry antibiotic-resistance genes and may help spread these genes. The paper notes that while studies show enrichment of resistant bacteria on plastics, it remains unclear whether this translates into actual disease risk for humans or animals.
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