Impact of treated wastewater irrigation on antibiotic resistance in the soil microbiome.
Impact of treated wastewater irrigation on antibiotic resistance in the soil microbiome.
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DOI：
10.1007/s11356-013-1505-4
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发表时间：
2013-06
期刊：
影响因子：
--
通讯作者：
Cytryn E
中科院分区：
文献类型：
--
作者：
Gatica J;Cytryn E
污水回用于灌溉是解决水资源短缺的一种切实可行的解决方案，特别是在世界干旱和半干旱地区。然而，与这种做法相关的几个潜在的环境和健康风险。其中一个风险来自于这样一个事实，即TWW灌溉可能会增加土壤细菌的抗生素耐药性(AR)水平，潜在地促进临床AR的全球传播。污水处理厂(WWTP)污水由于抗生素和其他化合物产生的选择性压力而被认为是重要的环境AR水库，这些化合物经常在污水中被检测到。本文综述了近几年来人类活动对环境细菌群落AR的影响，重点阐述了TWW灌溉对土壤微生物群落AR的潜在影响。根据目前的技术状况，我们得出的结论是，与淡水环境相反，TWW灌溉似乎不会影响土壤微生物群中的AR水平。在淡水环境中，污水处理厂的污水流入往往会扩大抗生素耐药性细菌(ARB)和抗生素耐药性基因的水平。尽管这一结论是对TWW灌溉未来实施持谨慎乐观态度的一个理由，但我们的结论是，在排除TWW灌溉对灌溉土壤中抗生素抗性水库的可能贡献之前，需要进一步进行旨在评估与污水相关的ARB和土壤细菌之间水平基因转移范围的进一步研究。
The reuse of treated wastewater (TWW) for irrigation is a practical solution for overcoming water scarcity, especially in arid and semiarid regions of the world. However, there are several potential environmental and health-related risks associated with this practice. One such risk stems from the fact that TWW irrigation may increase antibiotic resistance (AR) levels in soil bacteria, potentially contributing to the global propagation of clinical AR. Wastewater treatment plant (WWTP) effluents have been recognized as significant environmental AR reservoirs due to selective pressure generated by antibiotics and other compounds that are frequently detected in effluents. This review summarizes a myriad of recent studies that have assessed the impact of anthropogenic practices on AR in environmental bacterial communities, with specific emphasis on elucidating the potential effects of TWW irrigation on AR in the soil microbiome. Based on the current state of the art, we conclude that contradictory to freshwater environments where WWTP effluent influx tends to expand antibiotic-resistant bacteria (ARB) and antibiotic-resistant genes levels, TWW irrigation does not seem to impact AR levels in the soil microbiome. Although this conclusion is a cause for cautious optimism regarding the future implementation of TWW irrigation, we conclude that further studies aimed at assessing the scope of horizontal gene transfer between effluent-associated ARB and soil bacteria need to be further conducted before ruling out the possible contribution of TWW irrigation to antibiotic-resistant reservoirs in irrigated soils.
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