AI Article Synopsis

  • The study investigates the prevalence and mapping of antibiotic resistance genes (ARGs) in water and soil within small rural watersheds in Southwest China, highlighting inadequate existing data.
  • ARG profiles were analyzed using microbial metagenomics, with a focus on 209 ARGs linked to commonly used antibiotics, revealing consistent ARG abundance between water and soil but differing in subtypes.
  • The findings indicate that human activities, particularly livestock waste and agricultural practices, significantly influence the diversity and transport of ARGs, with Proteobacteria, Actinobacteria, and Bacteroidetes identified as key ARG hosts.

Article Abstract

The prevalence and spread of antibiotic resistance genes (ARGs) have been a significant concern for global public health in recent years. Small rural watersheds are the smallest units of factor mobility for agricultural production in China, and their ARG profiles are the best scale of the contamination status, but the mapping and the distribution and diffusion of ARGs in the water and soil of small rural watersheds are inadequate. In this study, based on microbial metagenomics, we invested prevalence maps of 209 ARGs corresponding to typical commonly used antibiotics (including multidrug, aminoglycoside, macrolide-lincosamide-streptogramin B (MLSB), and β-Lactamase) in water and soil in different agricultural types, as well as within water-soil interfaces in small rural watersheds in Southwest China. The results revealed that the most abundant ARGs in water and soil were consistent, but different in subtypes, and anthropogenic activities affect the transport of ARGs between water and soils. Livestock wastewater discharges influenced the diversity and abundance of ARGs in water, while in soil it is planting type and fertilizer management, and thus interfered with the co-occurrence patterns between bacteria and ARGs. Co-occurrence analysis revealed that Proteobacteria, Actinobacteria, and Bacteroidetes were the predominant ARG hosts in water and soil, but soil exhibited a more intricate ARG-bacterial association. Overall, this study provides integrated profiles of ARGs in water and soil influenced by anthropogenic activities at the small watershed scale in a typical rural area and provides a baseline for comparisons of ARGs.

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Source
http://dx.doi.org/10.1016/j.ecoenv.2024.117118DOI Listing

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