Arid
DOI10.3389/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
ISSN1664-302X
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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