Annual trends and health risks of antibiotics and antibiotic resistance genes in a drinking water source in East China.

The Science of the Total Environment
Yaru HuChangzheng Cui

Abstract

The extensive pollution of antibiotics and antibiotic resistance genes (ARGs) in drinking water has aroused worldwide concern. Successive monitoring of these pollutants has noteworthy significance for drinking water safety. Accordingly, this study conducted successive monitoring of antibiotics and ARGs from 2015 to 2017 in a drinking water source in East China. The total antibiotic concentration ranged from 19.68 ng/L to 497.00 ng/L, and decreased slightly from 2015 to 2017. Eighteen out of forty-one ARG subtypes showing resistance to six antibiotic classes and one class I integrase gene intI1, were detected in the drinking water source at concentrations ranging from 6.5 × 104 copies/mL to 1.6 × 106 copies/mL. Importantly, the total ARG concentration increased on an annual basis from 2015 to 2017 with an average annual increment of 0.25 orders of magnitude, which was mainly attributed to the increase in specific ARG subtypes, such as sul1, sul2, sul3, tetA, qnrB, and ermB. Most ARGs was positively correlated with the intI1 genes (r = 0.47-0.55, P < 0.01). Furthermore, the variation of antibiotics and ARGs appeared to be related to the water indices, particularly of the values of COD, BOD5, NO2-N (P < 0.05). This study provides ...Continue Reading

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Citations

Aug 25, 2021·The Science of the Total Environment·Yaru HuChangzheng Cui
Oct 22, 2021·The Science of the Total Environment·Qiqi ZhouSizhuang Wang

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