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Variations of Escherichia coli O157:H7 Survival in Purple Soils

1
College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
2
Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2017, 14(10), 1246; https://doi.org/10.3390/ijerph14101246
Received: 27 September 2017 / Revised: 3 October 2017 / Accepted: 3 October 2017 / Published: 18 October 2017
(This article belongs to the Section Environmental Health)
Escherichia coli O157:H7 is a well-recognized cause of human illness. Survival of Escherichia coli O157:H7 in five purple soils from Sichuan Province was investigated. The dynamics of E. coli O157:H7 survival in purple soils were described by the Weibull model. Results showed that this model is suitable to fit survival curves of E. coli O157:H7 in purple soils, with the calculated td value (survival time needed to reach the detection limit of 100 CFU·g−1) ranging from 2.99 days to 26.36 days. The longest survival time of E. coli O157:H7 was observed in neutral purple soils (24.49 days), followed by alkalescent purple soil (18.62 days) and acid purple soil (3.48 days). The redundancy analysis (RDA) revealed that td values were significantly enhanced by soil nutrition (total organic carbon (OC), total nitrogen (TN), available potassium (AK) and the ratio of humic acid to fulvic acid (Ha/Fa)), but were significantly suppressed by iron and aluminum oxide. View Full-Text
Keywords: Escherichia coli O157:H7 (E. coli O157:H7); purple soils; Weibull model; soil nutrition; iron and aluminum oxide Escherichia coli O157:H7 (E. coli O157:H7); purple soils; Weibull model; soil nutrition; iron and aluminum oxide
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Zhang, T.; Hu, S.; Yang, W. Variations of Escherichia coli O157:H7 Survival in Purple Soils. Int. J. Environ. Res. Public Health 2017, 14, 1246.

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