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Diversity, heavy metals, and antibiotic resistance in culturable heterotrophic bacteria isolated from former lead–silver–zinc mine heap in Tarnowskie Gory (Silesia, Poland)

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Abstract

Mine tailings represent a great environmental concern due to their high contents of heavy metals. Cultivation analysis of microbiota of Tarnowskie Góry (Poland) mine tailing showed the occurrence of bacteria with colony-forming units as low as 5.7 × 104 per one gram of dried substrate. Among 110 bacterial isolates identified by a combination of MALDI-TOF mass spectrometry and 16S rRNA gene sequencing, phylum Actinobacteria was dominant, followed by Firmicutes and Proteobacteria. Extremely high levels of heavy-metal resistance were observed in Arthrobacter spp., particularly for zinc (500 mg/L), lead (1500 mg/L), and cadmium (1000 mg/L). On the other hand, Staphylococcus spp. showed high tolerance to several antibiotics tested, especially ampicillin, partly due to blaZ gene presence. Due to the occurrence of antibiotic-resistant bacteria, mine tailings are not the cause of heavy-metal contamination only, but also a source of antibiotic-resistant bacteria and thus may represent a serious risk for public health.

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Funding

This research was funded by Slovak Grant Agency VEGA (Grant No. 1/0779/21) and APVV (Slovak Research and Development Agency) Grant Agency (Grant No. SK-PL-18-0012). J.W., A.F., and S.M. acknowledge support from the Polish National Agency for Academic Exchange (Grant No. PPN/BIL/2018/1/00026/U/00001) and 11/020/BK_22/0088 Grant for Department of Metallurgy and Recycling, Silesian University of Technology, Poland.

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P.P., M.P. and J.S-K. designed the study and were responsible for project administration and funding acquisition. J.W., A.F. and M.S. performed the collection of samples and performed chemical analysis of substrate. L.N. and M.P. performed all biological experiments, L.N. and P.P. analyzed the sequence data. L.N., M.P. and P.P. wrote the paper with input from all authors. All authors discussed the results and contributed to the final manuscript.

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Correspondence to Peter Pristas.

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The authors declare no relevant financial or non-financial interests with respect to the work performed in the manuscript.

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Communicated by Erko Stackebrandt.

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Nosalova, L., Willner, J., Fornalczyk, A. et al. Diversity, heavy metals, and antibiotic resistance in culturable heterotrophic bacteria isolated from former lead–silver–zinc mine heap in Tarnowskie Gory (Silesia, Poland). Arch Microbiol 205, 26 (2023). https://doi.org/10.1007/s00203-022-03369-9

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  • DOI: https://doi.org/10.1007/s00203-022-03369-9

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