Abstract
Massive antibiotic resistance genes (ARG) were detected in the soil modified by manure, which may affect human life safety through the food chain. However, the transmission of ARGs through the soil–plant-animal food chain is still unclear. Therefore, this study used high-throughput quantitative PCR technology to explore the effects of pig manure application on ARGs and bacterial communities in soil, lettuce phyllosphere, and snail excrement. The results showed that a total of 384 ARGs and 48 MEGs were detected in all samples after 75 days of incubation. The diversity of ARGs and MGEs in soil components increased significantly by 87.04% and 40% with the addition of pig manure. The absolute abundance of ARGs in the phyllosphere of lettuce was significantly higher than that of the control group, with a growth rate of 212.5%. Six common ARGs were detected between the three components of the fertilization group, indicating that there was internal transmission of fecal ARGs between the trophic levels of the food chain. Firmicutes and Proteobacteria were identified as the dominant host bacteria in the food chain system, which were more likely to be used as carriers of ARGs to promote the spread of resistance in the food chain. The results were used to assess the potential ecological risks of livestock and poultry manure. It provides theoretical basis and scientific support for the formulation of ARG prevention and control policies.
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The datasets used and/or analyzed during the current study are available from the corresponding author upon reasonable request.
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Acknowledgements
We are grateful to the Youth Program of the National Natural Science Foundation of China (41701564), Suzhou Science and Technology Plan Program (SNG201613), and the Natural Science Foundation of the Higher Education institutions of Jiangsu Province, China (17KJB610010) for providing financial support for this study. We would like to thank Editage (www.editage.cn) for English language editing.
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This research was funded by the Youth Program of the National Natural Science Foundation of China (41701564), Suzhou Science and Technology Plan Program (SNG201613), and Natural Science Foundation of the Higher Education Institutions of Jiangsu Province, China (17KJB610010).
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Conceptualization, Yuan Zhang; methodology, Yuan Zhang; software, Jiayi Zhao; validation, Minglong Chen, Xinyue Tang, Yijia Wang, and Yun Zou; formal analysis, Jiayi Zhao; investigation, Jiayi Zhao and Minglong Chen; resources, Minglong Chen; data curation, Jiayi Zhao; writing—original draft preparation, Jiayi Zhao; writing—review and editing, Yuan Zhang; visualization, Jiayi Zhao; supervision, Yuan Zhang; project administration, Yuan Zhang; funding acquisition, Yuan Zhang. All the authors have read and agreed to the published version of the manuscript.
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Zhang, Y., Zhao, J., Chen, M. et al. Fecal antibiotic resistance genes were transferred through the distribution of soil-lettuce-snail food chain. Environ Sci Pollut Res 30, 87793–87809 (2023). https://doi.org/10.1007/s11356-023-28606-6
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DOI: https://doi.org/10.1007/s11356-023-28606-6