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- W2917777748 abstract "Urban wastewater treatment plants (UWTPs) are considered hot spots for the accumulation and transfer of antibiotic resistant bacteria and their genes. We investigated the prevalence, diversity, and genomic localization of β-lactamase resistance genes in wastewater from different parts of an UWTP, such as raw wastewater, wastewater from biological reactor, and treated wastewater, collected from the UWTP of Warsaw, Poland. In this study, we focused on gram-negative rods, mainly Enterobacteriaceae, and used Multiplex PCR to identify various β-lactamase resistance genes (bla). Susceptibility to a number of antibiotics and genomic localization of β-lactamase resistance genes were then determined using disc-diffusion and Southern hybridization methods, respectively. No differences in the frequency of different types of bla genes between the sampling points were discerned. Three new variants of β-lactamase genes (blaCMY-157, blaMOX-13, and blaFOX-15) were identified. Four bla genes (blaTEM-12, blaTEM-30, blaTEM-47/68, blaACT) that had never been found in UWTPs were identified in this study. Nine of the identified bla genes had been found in the same environment previously. The blaFOX-15 variant on a Kluyvera sp. plasmid and blaGES type on Raoultella spp. plasmids were observed for the first time in these genera. There was a decrease in the number of multidrug resistant strains in the effluent compared to the influent. Finally, a significantly higher number of cefotaxime and carbapenem unsusceptible strains were detected in the influent than in the effluent. The results strongly support the hypothesis of UWTPs as a hot spot for antibiotic resistant genes (ARGs) and antibiotic resistant bacteria (ARB) accumulation and indicate that β-lactamase genes are widely disseminated among gram-negative rods isolated from this environment." @default.
- W2917777748 created "2019-03-02" @default.
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- W2917777748 date "2019-02-26" @default.
- W2917777748 modified "2023-10-06" @default.
- W2917777748 title "Diversity of β-lactam resistance genes in gram-negative rods isolated from a municipal wastewater treatment plant" @default.
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- W2917777748 doi "https://doi.org/10.1007/s13213-019-01450-1" @default.
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