1. Uncovering the prevalence and drivers of antibiotic resistance genes in soils across different land-use types.
- Author
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Wu, Jie, Guo, Shumin, Lin, Haiyan, Li, Kejie, Li, Zhutao, Wang, Jinyang, Gaze, William H., and Zou, Jianwen
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DRUG resistance in bacteria , *MOBILE genetic elements , *AGRICULTURE , *FOREST soils , *ECOSYSTEM health - Abstract
The emergence and spread of antibiotic resistance genes (ARGs) in soil due to animal excreta and organic waste is a major threat to human health and ecosystems, and global efforts are required to tackle the issue. However, there is limited knowledge of the variation in ARG prevalence and diversity resulting from different land-use patterns and underlying driving factors in soils. This study aimed to comprehensively characterize the profile of ARGs and mobile genetic elements and their drivers in soil samples collected from 11 provinces across China, representing three different land-use types, using high-throughput quantitative polymerase chain reaction and 16S rRNA amplicon sequencing. Our results showed that agricultural soil had the highest abundance and diversity of ARGs, followed by tea plantation and forest land. A total of 124 unique ARGs were detected in all samples, with shared subtypes among different land-use patterns indicating a common origin or high transmission frequency. Moreover, significant differences in ARG distribution were observed among different geographical regions, with the greatest enrichment of ARGs found in southern China. Biotic and abiotic factors, including soil properties, climatic factors, and bacterial diversity, were identified as the primary drivers associated with ARG abundance, explaining 71.8% of total ARG variation. The findings of our study demonstrate that different land-use patterns are associated with variations in ARG abundance in soil, with agricultural practices posing the greatest risk to human health and ecosystems regarding ARGs. Our identification of biotic and abiotic drivers of ARG abundance provides valuable insights into strategies for mitigating the spread of these genes. This study emphasizes the need for coordinated and integrated approaches to address the global antimicrobial resistance crisis. [Display omitted] • The highest ARG abundance and diversity occurred in agricultural soil. • Forest soil showed high contamination trends owing to the spread of ARGs. • Large differences in ARG abundance across geographic regions in China. • Bacterial communities, soil properties, and climatic factors jointly to determine ARG profiles. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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