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首页> 美国卫生研究院文献>Pathogens >Fecal Source Tracking in A Wastewater Treatment and Reclamation System Using Multiple Waterborne Gastroenteritis Viruses
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Fecal Source Tracking in A Wastewater Treatment and Reclamation System Using Multiple Waterborne Gastroenteritis Viruses

机译：使用多种水源性胃肠炎病毒的废水处理和再生系统中的粪便来源跟踪

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Gastroenteritis viruses in wastewater reclamation systems can pose a major threat to public health. In this study, multiple gastroenteritis viruses were detected from wastewater to estimate the viral contamination sources in a wastewater treatment and reclamation system installed in a suburb of Xi’an city, China. Reverse transcription plus nested or semi-nested PCR, followed by sequencing and phylogenetic analysis, were used for detection and genotyping of noroviruses and rotaviruses. As a result, 91.7% (22/24) of raw sewage samples, 70.8% (17/24) of the wastewater samples treated by anaerobic/anoxic/oxic (A O) process and 62.5% (15/24) of lake water samples were positive for at least one of target gastroenteritis viruses while all samples collected from membrane bioreactor effluent after free chlorine disinfection were negative. Sequence analyses of the PCR products revealed that epidemiologically minor strains of norovirus GI (GI/14) and GII (GII/13) were frequently detected in the system. Considering virus concentration in the disinfected MBR effluent which is used as the source of lake water is below the detection limit, these results indicate that artificial lake may be contaminated from sources other than the wastewater reclamation system, which may include aerosols, and there is a possible norovirus infection risk by exposure through reclaimed water usage and by onshore winds transporting aerosols containing norovirus.
机译：废水回收系统中的胃肠炎病毒可能对公共健康构成重大威胁。在这项研究中，从废水中检测到多种胃肠炎病毒，以估算中国西安市郊区安装的废水处理和再生系统中的病毒污染源。反转录加上巢式或半巢式PCR，然后进行测序和系统发育分析，用于检测诺如病毒和轮状病毒并对其进行基因分型。结果，91.7％（22/24）的原污水样品，70.8％（17/24）的废水经厌氧/缺氧/氧化（AO）处理和62.5％（15/24）的湖水样品至少一种目标胃肠炎病毒呈阳性，而游离氯消毒后从膜生物反应器流出物中收集的所有样品均为阴性。 PCR产物的序列分析表明，在该系统中经常检测到流行病学上较小的诺如病毒GI（GI / 14）和GII（GII / 13）毒株。考虑到用作湖水水源的经过消毒的MBR废水中的病毒浓度低于检测极限，这些结果表明，人工湖可能受到废水回收系统以外的其他来源的污染，其中可能包括气溶胶，并且存在可能是诺沃病毒感染的风险，包括通过再生水的暴露和运输含有诺沃病毒的气溶胶的陆上风向。

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