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Quantification and Multidrug Resistance Profiles of Vancomycin-Resistant Enterococci Isolated from Two Wastewater Treatment Plants in the Same Municipality. | LitMetric

AI Article Synopsis

  • * A study comparing two types of wastewater treatment systems (biologically aerated filter and conventional activated sludge) showed that the BAF system was more effective in removing enterococci and VRE than the CAS system.
  • * The findings revealed a decrease in certain antibiotic resistances in the BAF WWTP, while the CAS WWTP exhibited mixed results, indicating that management of wastewater processes can help reduce the spread of antimicrobial resistance in the environment.

Article Abstract

Wastewater treatment plants (WWTPs) are points of control for the environmental dissemination of antimicrobial resistant bacteria. Vancomycin-resistant enterococci (VRE) were used as indicators of antimicrobial resistance (AMR) in two WWTPs (biologically aerated filter (BAF) and conventional activated sludge (CAS)) in the same municipality. The removal and abundance of enterococci and VRE as well as the species and antimicrobial resistance profiles of VRE were assessed. Enterococci and VRE from the primary and final effluents were enumerated. Results were assessed from an ecological context. VRE was not selected for by either WWTP but the BAF system outperformed the CAS system for the removal of enterococci/VRE. ( = 151), ( = 94) and / ( = 59) were the dominant VRE species isolated. A decrease in levofloxacin resistance in enterococci was observed in the BAF WWTP. An increase in nitrofurantoin resistant ( < 0.001) and a decrease in quinupristin/dalfopristin ( = 0.003) and streptomycin ( = 0.022) resistant enterococci were observed in the CAS WWTP, corresponding to a shift of VRE from to . Wastewater treatment processes can be managed to limit the dissemination of antimicrobial resistance determinants into the surrounding environment.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6956375PMC
http://dx.doi.org/10.3390/microorganisms7120626DOI Listing

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