2020

Water Research

Rocznik: 2020 | Tom: 170

artykuł naukowy

angielski

EN The emergence and spread of resistance to antibiotics among bacteria is the most serious global threat to public health in recent and coming decades. In this study, we characterized qualitatively and quantitatively beta-lactamase and carbapenemase genes in the wastewater resistome of Central Wastewater Treatment Plant in Kozieglowy, Poland. The research concerns determination of the frequency of genes conferring resistance to beta-lactam and carbapenem antibiotics in the genomes of culturable bacteria, as well as in the wastewater metagenome at three stages of treatment: raw sewage, aeration tank, and final effluent. In the final effluent we found bacteria with genes that pose the greatest threat to public health, including genes of extended spectrum beta-lactamases - bla(CTX-M) carbapenemases - bla(NDM), bla(VIM,) bla(GES), bla(OXA-48), and showed that during the wastewater treatment their frequency increased. Moreover, the wastewater treatment process leads to significant increase in the relative abundance of bla(TEM ) and bla(GES) genes and tend to increase the relative abundance of bla(CTX-M), bla(SHV) and bla(OXA-48) genes in the effluent metagenome. The biodiversity of bacterial populations increased during the wastewater treatment and there was a correlation between the change in the composition of bacterial populations and the variation of relative abundance of beta-lactamase and carbapenemase genes. PCR-based quantitative metagenomic analysis combined with analyses based on culture methods provided significant information on the routes of ARBs and ARGs spread through WWTP. The limited effectiveness of wastewater treatment processes in the elimination of antibiotic-resistant bacteria and resistance genes impose the need to develop an effective strategy and implement additional methods of wastewater disinfection, in order to limit the increase and the spread of antibiotic resistance in the environment. (C) 2019 Elsevier Ltd. All rights reserved.

115277

10.1016/j.watres.2019.115277

https://api.elsevier.com/content/article/PII:S0043135419310516?httpAccept=text/xml

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