Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.3389/fmicb.2013.00130 |
Reclaimed water as a reservoir of antibiotic resistance genes: distribution system and irrigation implications | |
Fahrenfeld, Nicole1; Ma, Yanjun1; O’Brien, Maureen2; Pruden, Amy1 | |
通讯作者 | Pruden, Amy |
来源期刊 | FRONTIERS IN MICROBIOLOGY
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ISSN | 1664-302X |
出版年 | 2013 |
卷号 | 4 |
英文摘要 | Treated wastewater is increasingly being reused to achieve sustainable water management in arid regions. The objective of this study was to quantify the distribution of antibiotic resistance genes (ARGs) in recycled water, particularly after it has passed through the distribution system, and to consider point-of-use implications for soil irrigation. Three separate reclaimed wastewater distribution systems in the western U.S. were examined. Quantitative polymerase chain reaction (qPCR) was used to quantify ARGs corresponding to resistance to sulfonamides (sul1, sul2), macrolides (ermF), tetracycline [tet(A), tet(0)], glycopeptides (vanA), and methicillin (mecA), in addition to genes present in waterborne pathogens Legionella pneumophila (Lmip), Escherichia coli (gadAB), and Pseudomonas aeruginosa (ecfx, gyrB). In a parallel lab study, the effect of irrigating an agricultural soil with secondary, chlorinated, or dechlorinated wastewater effluent was examined in batch microcosms. A broader range of ARGs were detected after the reclaimed water passed through the distribution systems, highlighting the importance of considering bacterial re-growth and the overall water quality at the point of use (POU). Screening for pathogens with qPCR indicated presence of Lmip and gadAB genes, but not ecfx or gyrB. In the lab study, chlorination was observed to reduce 16S rRNA and sul2 gene copies in the wastewater effluent, while dechlorination had no apparent effect. ARGs levels did not change with time in soil slurries incubated after a single irrigation event with any of the effluents. However, when irrigated repeatedly with secondary wastewater effluent (not chlorinated or dechlorinated), elevated levels of sul1 and sul2 were observed. This study suggests that reclaimed water may be an important reservoir of ARGs, especially at the POU, and that attention should be directed toward the fate of ARGs in irrigation water and the implications for human health. |
英文关键词 | antibiotic resistance genes water reuse reclaimed water distribution systems irrigation |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000331125700002 |
WOS关键词 | WASTE-WATER ; TETRACYCLINE RESISTANCE ; PSEUDOMONAS-AERUGINOSA ; ACTIVATED-SLUDGE ; UNITED-STATES ; BACTERIA ; PCR ; QUANTIFICATION ; IDENTIFICATION ; DISINFECTION |
WOS类目 | Microbiology |
WOS研究方向 | Microbiology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/177227 |
作者单位 | 1.Virginia Tech, Dept Civil & Environm Engn, Blacksburg, VA 24060 USA; 2.Colorado Sch Mines, Dept Civil & Environm Engn, Golden, CO 80401 USA |
推荐引用方式 GB/T 7714 | Fahrenfeld, Nicole,Ma, Yanjun,O’Brien, Maureen,et al. Reclaimed water as a reservoir of antibiotic resistance genes: distribution system and irrigation implications[J],2013,4. |
APA | Fahrenfeld, Nicole,Ma, Yanjun,O’Brien, Maureen,&Pruden, Amy.(2013).Reclaimed water as a reservoir of antibiotic resistance genes: distribution system and irrigation implications.FRONTIERS IN MICROBIOLOGY,4. |
MLA | Fahrenfeld, Nicole,et al."Reclaimed water as a reservoir of antibiotic resistance genes: distribution system and irrigation implications".FRONTIERS IN MICROBIOLOGY 4(2013). |
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