Response of Escherichia coli O157:H7 survival to pH of cultivated soils
作者： Haizhen Z. Wang , Gang Wei , Zhiyuan Y. Yao , Jun Lou , Kongcao C. Xiao
DOI: 10.1007/S11368-014-0944-Y
关键词:
摘要: The Escherichia coli (E. coli) O157:H7 survival dynamics in original and pH-modified agricultural soils were investigated to determinate how E. responded the pH values of different soils, identify relationships between time (t d ) soil properties, assess potential pathogen contamination after changed. six samples collected from provinces China, 18 obtained by treating with direct electric current. cells inoculated into 24 incubated at moisture −33 kPa 25 °C. sampled for determining numbers given intervals over incubation. effects change other properties on t analyzed. test 7.1—24.7 days. Results indicate that pH, texture, free Fe2O3 (Fed) most important factors impacting soils. Further, response varied In acidic (shorter values), decreased as Fed increased, while neutral or alkaline (pH ≥ 6.45, longer did not significantly pH. changes amorphous sesquioxides induced might strengthen Closer attention should be paid long its environmental risk.
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