Authors
Duncan Ongeng, Charles Muyanja, Jaak Ryckeboer, Annemie H Geeraerd, Dirk Springael
Publication date
2011/9/15
Journal
International Journal of Food Microbiology
Volume
149
Issue
2
Pages
133-142
Publisher
Elsevier
Description
The effect of cabbage (Brassica oleracea) rhizosphere on survival of Escherichia coli O157:H7 and Salmonella Typhimurium in manure-amended soils under tropical field conditions was investigated in the Central Agro-Ecological Zone of Uganda. Three-week old cabbage seedlings were transplanted and cultivated for 120days on manure-amended soil inoculated with 4 or 7log CFU/g non-virulent E. coli O157:H7 and S. Typhimurium. Cabbage rhizosphere did not affect survival of the 4log CFU/g inocula in manure-amended soil and the two enteric bacteria were not detected on/in cabbage leaves at harvest. The 7log CFU/g E. coli O157:H7 and S. Typhimurium survived in bulk soil for a maximum of 80 and 96days, respectively, but the organisms remained culturable in cabbage rhizosphere up to the time of harvest. At 7log CFU/g inoculum, E. coli O157:H7 and S. Typhimurium contamination on cabbage leaves …
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