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首页> 外文期刊>Applied Microbiology >Plant-Pathogenic Oomycetes, Escherichia coli Strains, and Salmonella spp. Frequently Found in Surface Water Used for Irrigation of Fruit and Vegetable Crops in New York State
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Plant-Pathogenic Oomycetes, Escherichia coli Strains, and Salmonella spp. Frequently Found in Surface Water Used for Irrigation of Fruit and Vegetable Crops in New York State

机译：植物致病卵菌，大肠杆菌菌株和沙门氏菌属。纽约州常见于灌溉水果和蔬菜作物的地表水中

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In the United States, surface water is commonly used to irrigate a variety of produce crops and can harbor pathogens responsible for food-borne illnesses and plant diseases. Understanding when pathogens infest water sources is valuable information for produce growers to improve the food safety and production of these crops. In this study, prevalence data along with regression tree analyses were used to correlate water quality parameters (pH, temperature, turbidity), irrigation site properties (source, the presence of livestock or fowl nearby), and precipitation data to the presence and concentrations of Escherichia coli , Salmonella spp., and hymexazol-insensitive (HIS) oomycetes ( Phytophthora and Pythium spp.) in New York State surface waters. A total of 123 samples from 18 sites across New York State were tested for E. coli and Salmonella spp., of which 33% and 43% were positive, respectively. Additionally, 210 samples from 38 sites were tested for HIS oomycetes, and 88% were found to be positive, with 10 species of Phytophthora and 11 species of Pythium being identified from the samples. Regression analysis found no strong correlations between water quality parameters, site factors, or precipitation to the presence or concentration of E. coli in irrigation sources. For Salmonella , precipitation (≤0.64 cm) 3 days before sampling was correlated to both presence and the highest counts. Analyses for oomycetes found creeks to have higher average counts than ponds, and higher turbidity levels were associated with higher oomycete counts. Overall, information gathered from this study can be used to better understand the food safety and plant pathogen risks of using surface water for irrigation.
机译：在美国，地表水通常用于灌溉多种农作物，并可能藏有导致食源性疾病和植物病害的病原体。了解病原体何时会侵扰水源对于生产者提高食品安全性和这些作物的产量是有价值的信息。在这项研究中，流行率数据和回归树分析用于将水质参数（pH，温度，浊度），灌溉地点属性（来源，附近牲畜或家禽的存在）以及降水量数据与水的存在和浓度相关联。纽约州地表水域中的大肠杆菌，沙门氏菌属和对羟甲唑不敏感（HIS）的卵菌（疫霉菌和腐霉菌属）。来自纽约州18个地点的总共123个样本进行了大肠杆菌和沙门氏菌检测，其中33％和43％呈阳性。此外，对来自38个地点的210个样品进行了HIS卵菌的检测，发现88％为阳性，从样品中鉴定出10种疫霉菌和11种腐霉菌。回归分析发现，水质参数，站点因子或降水与灌溉源中大肠杆菌的存在或浓度之间没有强相关性。对于沙门氏菌，采样前3天的降水量（≤0.64cm）与存在和最高计数相关。卵菌的分析发现，小河的平均计数高于池塘，浊度较高的卵菌计数更高。总体而言，从这项研究中收集的信息可用于更好地了解使用地表水灌溉的食品安全性和植物病原体风险。

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