Amoxicillin effects on functional microbial community and spread of antibiotic resistance genes in amoxicillin manufacture wastewater treatment system  

作　　者：Lingwei Meng Xiangkun Li Xinran Wang Kaili Ma Gaige Liu Jie Zhang 

机构地区：[1]School of Municipal and Environmental Engineering, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China

出　　处：《Journal of Environmental Sciences》2017年第11期110-117,共8页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.51478138);the State Key Lab of Urban Water Resource and Environment (No.HIT ES200902)

摘　　要：This study aimed to reveal how amoxicillin（AMX） affected the microbial community and the spread mechanism of antibiotic resistance genes（ARGs） in the AMX manufacture wastewater treatment system. For this purpose, a 1.47 L expanded granular sludge bed（EGSB） reactor was designed and run for 241 days treating artificial AMX manufacture wastewater. 454 pyrosequencing was applied to analyze functional microorganisms in the system. The antibiotic genes OXA_（-1）, OXA_（-2）, OXA_（-10）, TEM_（-1）, CTX-M_（-1）, class I integrons（intI1） and 16 SrRNA genes were also examined in sludge samples. The results showed that the genera Ignavibacterium, Phocoenobacter,Spirochaeta, Aminobacterium and Cloacibacillus contributed to the degradation of different organic compounds（such as various sugars and amines）. And the relative quantification of eachβ-lactam resistance gene in the study was changed with the increasing of AMX concentration.Furthermore the vertical gene transfer was the main driver for the spread of ARGs rather than horizontal transfer pathways in the system.This study aimed to reveal how amoxicillin（AMX） affected the microbial community and the spread mechanism of antibiotic resistance genes（ARGs） in the AMX manufacture wastewater treatment system. For this purpose, a 1.47 L expanded granular sludge bed（EGSB） reactor was designed and run for 241 days treating artificial AMX manufacture wastewater. 454 pyrosequencing was applied to analyze functional microorganisms in the system. The antibiotic genes OXA_（-1）, OXA_（-2）, OXA_（-10）, TEM_（-1）, CTX-M_（-1）, class I integrons（intI1） and 16 SrRNA genes were also examined in sludge samples. The results showed that the genera Ignavibacterium, Phocoenobacter,Spirochaeta, Aminobacterium and Cloacibacillus contributed to the degradation of different organic compounds（such as various sugars and amines）. And the relative quantification of eachβ-lactam resistance gene in the study was changed with the increasing of AMX concentration.Furthermore the vertical gene transfer was the main driver for the spread of ARGs rather than horizontal transfer pathways in the system.

关 键 词：Amoxicillin（AMX） Expanded granular sludge bed（EGSB） 454 pyrosequencing Antibiotic resistance genes（ARGs） 

分 类 号：X787[环境科学与工程—环境工程]