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• W3175997978 endingPage "148552" @default.
• W3175997978 startingPage "148552" @default.
• W3175997978 abstract "Water is the main resource for maintaining life. Anthropic activities influence the microbial epidemiological chain in watersheds, which can act as ways of disseminating microorganisms resistant to antimicrobial drugs, with impacts on human, animal, and environmental health. Here, we characterized aquatic microbial communities and their resistomes in samples collected along Rio das Ostras watershed during two seasons. Surface water samples were collected at eleven sites from the Jundiá, Iriry, and Rio das Ostras rivers in two seasons (dry and wet season). Microbial DNA was extracted, high-throughput sequenced and screened for antimicrobial resistance genetic (ARG) markers. The physicochemical characteristics and the microbiota data confirmed that Rio das Ostras watershed can be divided into three well defined portions: rural, urban, and marine. Rural areas were enriched by bacteria typically found in limnic environments and Patescibacteria phyla. The urban portion was characterized by sites with low pH and groups associated with iron oxidation. Some genera of clinical relevance were also identified, though in relatively low abundance. The marine site was enriched mainly by Cyanobacteria and bacteria that showed strong correlation with conductivity, salinity, and chloride. Twenty-six ARG markers were identified on the resistome, being found most frequently in the urban area, despite being present in rural sites. Among them were some related to classes of great clinical concern, such as genes coding for extended-spectrum beta-lactamase (blaCTX-M and blaTEM), resistance to carbapenems (blaKPC) and to methicillin by Staphylococcus aureus (mecA). These results broaden our understanding of the microbial community of a watershed impacted by anthropogenic actions. The large number of ARGs detected along the Rio das Ostras watershed contrasts with the small number of microorganisms of clinical relevance observed, suggesting that antimicrobial resistance has arisen from non-clinical environments and microbes. Our results corroborate that freshwater acts as a reservoir of antimicrobial resistance genes." @default.
• W3175997978 created "2021-07-05" @default.
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• W3175997978 date "2021-11-01" @default.
• W3175997978 modified "2023-10-14" @default.
• W3175997978 title "A watershed impacted by anthropogenic activities: Microbial community alterations and reservoir of antimicrobial resistance genes" @default.
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• W3175997978 doi "https://doi.org/10.1016/j.scitotenv.2021.148552" @default.
• W3175997978 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34328962" @default.
• W3175997978 hasPublicationYear "2021" @default.
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