Effects of Cultivating Years on Survival of Culturable Escherichia coli O157:H7 in Greenhouse Soils.
Effects of Cultivating Years on Survival of Culturable Escherichia coli O157:H7 in Greenhouse Soils.
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DOI：
10.4315/0362-028x.jfp-18-287
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发表时间：
2019-02
影响因子：
2
通讯作者：
Z. Yao;Hao Zhang;Chunling Liang;Yingzhe Wang;Yuping Wu
中科院分区：
文献类型：
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作者：
Z. Yao;Hao Zhang;Chunling Liang;Yingzhe Wang;Yuping Wu
从公共卫生的角度来看，大肠杆菌O 157：H7如何在土壤中存活以及决定其存活的主要因素是至关重要的问题。本研究探讨了E.大肠杆菌O 157：H7在南方大棚蔬菜土壤中的培养时间为0、1、4、8和12年。结果表明：5种供试土壤的存活时间（td）为9.00 ~ 21.11 d;总的来说，E.大肠杆菌O 157：H7在相同培养条件下，在露地土壤中的存活时间比在温室土壤中的存活时间长。TD值较大的土壤电导率较低的水平，较高水平的总氮，和较高水平的砂含量。相对于其他因素，电导率是影响E.大肠杆菌O 157：H7。E.大肠杆菌O 157：H7在不同种植模式下的蔬菜土壤中的污染突出了预防病原污染对食品安全的重要性。
The extent to how Escherichia coli O157:H7 can survive in soil and the predominant factors that determine its survival are crucial issues from a public health point of view. This study investigated the survival of E. coli O157:H7 in vegetable soils in plastic-greenhouse cultivation over 0, 1, 4, 8, and 12 years in southern China. Results showed that the survival times ( td) calculated from the Weibull model for the five tested soils ranged from 9.00 to 21.11 days. In general, E. coli O157:H7 survived longer in open-field soils than in greenhouse soils under the same incubation conditions. The td values were greater in soils with a lower level of electrical conductivity, a higher level of total nitrogen, and a higher level of sand content. Compared to other factors, electrical conductivity was the most important factor affecting the survival of E. coli O157:H7 in the tested soils. Different survival times of E. coli O157:H7 in vegetable soils under diverse cultivation patterns highlight the importance of preventing pathogenic contamination for the purpose of food safety.