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Fate of Escherichia coli O157: H7 in agricultural soils amended with different organic fertilizers.
- Source :
-
Journal of Hazardous Materials . Oct2015, Vol. 296, p30-36. 7p. - Publication Year :
- 2015
-
Abstract
- Five organic fertilizers (vermicompost, pig manure, chicken manure, peat and oil residue) were applied to agricultural soils to study their effects on the survival of Escherichia coli O157:H7 ( E. coli O157:H7). Results showed that E. coli O157:H7 survival changed greatly after organic fertilizers application, with shorter t d values (survival time needed to reach the detection limit of 100 CFU g −1 ) (12.57 ± 6.57 days) in soils amended with chicken manure and the longest (25.65 ± 7.12 days) in soils amended with pig manure. Soil pH, EC and free Fe/Al (hydro) oxides were significant explanatory factors for E. coli O157:H7 survival in the original soils. Soil constituents (minerals and organic matter) and changes in their surface charges with pH increased the effect of soil pH on E. coli O157:H7 survival. However, electrical conductivity played a more important role in regulating E. coli O157:H7 survival in fertilizer-amended soils. This study highlighted the importance of choosing appropriate organic fertilizers in the preharvest environment to reduce food-borne bacterial contamination. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03043894
- Volume :
- 296
- Database :
- Academic Search Index
- Journal :
- Journal of Hazardous Materials
- Publication Type :
- Academic Journal
- Accession number :
- 103087624
- Full Text :
- https://doi.org/10.1016/j.jhazmat.2015.04.023