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The correlation between antibiotic resistance gene abundance and microbial community resistance in pig farm wastewater and surrounding rivers

文献类型： 外文期刊

作者： Yang, Yiwen 1 ; Liv, Zixiao 1 ; Xing, Sicheng 1 ; Liao, Xindi 1 ;

作者机构： 1.South China Agr Univ, Coll Anim Sci, Guangzhou 510642, Guangdong, Peoples R China

2.South China Agr Univ, Minist Agr, Key Lab Trop Agr Environm, Guangzhou 510642, Guangdong, Peoples R China

3.South China Agr Univ, Guangdong Prov Key Lab Agroanim Genom & Mol Breed, Guangzhou 510642, Guangdong, Peoples R China

关键词： Antimicrobial resistance gene (ARG); Microbial resistance (MR); Wastewater; Pig farm

期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.291； 五年影响因子：6.393 ）

ISSN： 0147-6513

年卷期： 2019 年 182 卷

页码：

收录情况： SCI

摘要： Antimicrobial resistance gene (ARG) abundance and microbial resistance (MR) are often used as important indicators of pollution risk; however, the relationship between ARGs abundance and MR in pig farm wastewater remains unknown. In this study, the raw pig farm wastewater, effluent water, upstream river water, domestic wastewater and downstream river water samples were collected. The concentration of 20 subtypes of ARGs and 2 integrons, minimal inhibit concentration (MIC), and bacterial communities were investigated. In this study, 20 subtypes of ARGs and integrons were detected in all sampling sites. The highest abundance of 17 of the 20 subtypes of ARGs was detected in raw pig farm wastewater, and ermA had the maximum average abundance of 108 copies/mL, with up to 2.41 +/- 0.12 x 10(8) copies/mL. There was no significant correlation between MR to three antibiotics (ciprofloxacin, streptomycin and tetracycline hydrochloride) and the abundance of their corresponding ARGs (P > 0.05), and a large difference was detected between the types of ARGs co-occur bacteria and resistance co-occur bacteria in the 5 sampling sites. And the pig farm wastewater treatment (WWT) could effectively reduce the ARGs and MR to the 3 antibiotics. The results presented here show that there may be no obvious correlation between ARGs and MCR in pig farm wastewater and surrounding rivers, which may be due to various environmental factors, highlighting the urgent need for a comprehensive evaluation of relationship between ARGs abundance and MR.

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