animal and environmental impact on the presence and distribution of salmonella and escherichia coli in hydroponic tomato greenhouses.from 2003 to 2004, we studied the impact of environmental influences on the microbiological quality of a hydroponic tomato farm. the presence of salmonella was investigated on 906 samples of tomatoes and 714 environmental samples. the farm comprised 14 greenhouses and a technologically advanced packinghouse, and operated under a sanitary agricultural practices plan. the objective of the present study was to determine the operating sources of contamination. during the course of the study, two ind ...200818468019
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