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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Fecal Contamination of Agricultural Soils Before and After Hurricane-Associated Flooding in North Carolina
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Fecal Contamination of Agricultural Soils Before and After Hurricane-Associated Flooding in North Carolina

机译：北卡罗来纳州飓风相关洪水前后农业土壤的粪便污染

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Hurricane Floyd and other storms in 1999 caused widespread and extensive flooding of eastern North Carolina and environmental contamination with fecal wastes from municipal wastewater and livestock operations. Because wastewater contains high levels of pathogenic micro-organisms, principal health risks to humans from flooding are consumption of crops grown in fecally contaminated soil and ingestion of contaminated water. Flood waters polluted with microbial and other contaminants also may be detrimental to the health of livestock and plant crops. In the present study, agricultural soils impacted by flood waters were analyzed for bacterial and viral indicators of fecal contamination. Total coliforms, fecal coliforms, Escherichia coli, spores of Clostrid-ium perfringens, and both male specific (F+) and somatic coliphages were recovered from soil and assayed in liquid culture media. A number of samples were positive for the presence of fecal coliforms, E. coli, and coliphages, indicating the presence of human or animal feces. Most samples were positive for total coliforms, and almost all samples contained high levels of Cl. perfringens spores. The levels of Cl. perfringens spores were significantly (P < 0.001) higher in flooded soil (post-Hurricane Floyd) compared to pre-flood soil. Persistent fecal contamination of soil, as demonstrated by the high levels of Cl. perfringens spores, suggests the need for additional or alternative measures to protect crop-growing areas, including prospective microbiological monitoring and improved protection of watersheds from incidents capable of releasing fecal material.
机译：1999年的弗洛伊德飓风和其他风暴造成北卡罗来纳州东部的洪水泛滥，城市污水和畜牧业产生的粪便浪费了环境。由于废水中含有高水平的病原微生物，洪水给人类造成的主要健康风险是食用在粪便污染土壤中生长的农作物和摄入污染水。被微生物和其他污染物污染的洪水也可能损害牲畜和植物的健康。在本研究中，分析了受洪水影响的农业土壤中粪便污染的细菌和病毒指标。从土壤中回收总大肠菌群，粪便大肠菌群，大肠杆菌，产气荚膜梭状芽孢杆菌的孢子以及雄性特异性（F +）和体细胞噬菌体，并在液体培养基中进行测定。许多样品的粪便大肠菌，大肠杆菌和噬菌体呈阳性，表明存在人类或动物粪便。大多数样品的总大肠菌群呈阳性，几乎所有样品均含有高水平的Cl。产气荚膜孢子。 Cl的水平。与淹水前土壤相比，淹水土壤（飓风后弗洛伊德）中产气荚膜孢子的孢子明显高（P <0.001）。持久的粪便污染土壤，如高水平的氯表明。产气孢子孢子表明，需要采取其他措施或其他措施来保护农作物种植区，包括前瞻性微生物监测和改进对流域的保护，使其免受能够释放粪便的事件的影响。

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