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| Content Provider | Springer Nature Link |
|---|---|
| Author | Wang, Haizhen Z. Wei, Gang Yao, Zhiyuan Y. Lou, Jun Xiao, Kongcao C. Wu, Laosheng S. Wu, Jianjun J. Xu, Jianming M. |
| Copyright Year | 2014 |
| Abstract | The Escherichia coli (E. coli) O157:H7 survival dynamics in original and pH-modified agricultural soils were investigated to determinate how E. coli O157:H7 survival responded to the pH values of different soils, identify the relationships between E. coli O157:H7 survival time (t $_{ d }$) and soil properties, and assess the potential pathogen contamination after soil pH changed.The six soil samples were collected from different provinces of China, and 18 pH-modified soil samples were obtained from original soils by treating the original soils with direct electric current. The E. coli O157:H7 cells were inoculated into 24 soils and incubated at soil moisture of −33 kPa and 25 °C. The soils were sampled for determining the numbers of E. coli O157:H7 at given time intervals over the incubation. The effects of soil pH change and other properties on the t $_{ d }$ values were analyzed.The t $_{ d }$ values in the test soils were between 7.1—24.7 days. Results indicate that soil pH, texture, and free Fe$_{2}$O$_{3}$ (Fe$_{d}$) were the most important factors impacting the t $_{ d }$ values in the test soils. Further, the response of E. coli O157:H7 survival to pH change varied with different soils. In the acidic soils (shorter t $_{ d }$ values), the t $_{ d }$ values decreased as the pH decreased and Fe$_{d}$ increased, while in the neutral or alkaline soils (pH ≥ 6.45, longer t $_{ d }$ values), the t $_{ d }$ values did not change significantly with pH.The changes of amorphous and free sesquioxides induced by pH change might strengthen the response of E. coli O157:H7 survival to soil pH. Closer attention should be paid to E. coli O157:H7 long survival in soils and its potential environmental contamination risk. |
| Starting Page | 1841 |
| Ending Page | 1849 |
| Page Count | 9 |
| File Format | |
| ISSN | 14390108 |
| Journal | Journal of Soils and Sediments |
| Volume Number | 14 |
| Issue Number | 11 |
| e-ISSN | 16147480 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2014-07-18 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Escherichia coli O157:H7 Survival Soil pH Clay free Fe$_{2}$O$_{3}$ Soil Science & Conservation Environment Environmental Physics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Stratigraphy Earth-Surface Processes |
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