Variations of Escherichia coli O157:H7 Survival in Purple Soils

International Journal of Environmental Research and Public Health

Taoxiang Zhang¹  Suping Hu¹  Wenhao Yang² 

[1] College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China;Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China;

关键词: Escherichia coli O157:H7 (E. coli O157:H7);    purple soils;    Weibull model;    soil nutrition;    iron and aluminum oxide;   

DOI  :  10.3390/ijerph14101246

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown