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Effects of a Mining Dam Disaster on Antimicrobial-Resistant and Metal-Tolerant Bacterial Strains Recovered from Environmental Samples

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Abstract

Anthropogenic activities are closely related to the emergence, spread, and evolution of antimicrobial resistance (AMR). In addition to the introduction of chemical pollutants into the environment, dam failure may contribute to the selection of AMR and metal tolerance, and horizontal gene transfer. In this context, environmental samples from unaffected and affected sites were analyzed to obtain bacterial strains and investigate AMR and metal tolerance, as well as antimicrobial resistance genes (ARGs) and metal tolerance genes (MTGs). A wide diversity of emerging bacterial pathogens has been detected, which are often associated with multidrug resistance and multimetal tolerance. Intrinsic and acquired ARGs and MTGs were identified in clinically important bacteria. Extended-spectrum β-lactamase-encoding genes were exclusive of Pseudomonas aeruginosa and Escherichia coli from sediments and soils of affected sites. Overall, P. aeruginosa, E. coli, and Klebsiella pneumoniae were the ones that presented ARGs and/or MTGs, as well as the coexistence of them, which increased in the affected sites. These findings support that mining pollution increased the amount of MTGs and that they co-occur with different ARGs in a great diversity of bacterial species.

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All data generated or analyzed during this study are included in this published article and its supplementary information files.

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Acknowledgments

The authors thank the FAPESP [grant no. 2018/01890-3], the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) [grant no. 88882.180855/2018-01, 88887.314388/2019-00, 88882.332034/2019-01, 88882.332036/2019-01, 88882.332039/2019-01, 88887.361231/2019-00, 88887.519091/2020-00, and Finance Code 001] and the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) [grant no. 150712/2022-7, 130086/2021-5, 141016/2021-3, 308914/2019-8, 304905/2022-4, and 143965/2015-8] for fellowships.

Funding

This study was supported by Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) [grant no. 2018/19539-0, 2021/01655-7, and 2018/24069-3].

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Correspondence to Eliana Guedes Stehling.

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Furlan, J.P.R., Ramos, M.S., dos Santos, L.D.R. et al. Effects of a Mining Dam Disaster on Antimicrobial-Resistant and Metal-Tolerant Bacterial Strains Recovered from Environmental Samples. Water Air Soil Pollut 235, 333 (2024). https://doi.org/10.1007/s11270-024-07171-9

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  • DOI: https://doi.org/10.1007/s11270-024-07171-9

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