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Persistence of Escherichia coli and Salmonella in Surface Soil following Application of Liquid Hog Manure for Production of Pickling Cucumbers
- Source :
- Journal of Food Protection. 68:900-905
- Publication Year :
- 2005
- Publisher :
- Elsevier BV, 2005.
-
Abstract
- Liquid hog manure is routinely applied to farm land as a crop fertilizer. However, this practice raises food safety concerns, especially when manure is used on fruit and vegetable crops. The objectives of this project were to evaluate the persistence of Escherichia coli and Salmonella in surface soil after application of liquid hog manure to fields where pickling cucumbers were grown and to verify the microbiological quality of harvested cucumbers. Mineral fertilizers were replaced by liquid hog manure at various ratios in the production of pickling cucumbers in a 3-year field study. The experimental design was a randomized complete block comprising four replicates in sandy loam (years 1, 2, and 3) and loamy sand (year 3). Soil samples were taken at a depth of 20 cm every 2 weeks after June application of organic and inorganic fertilizers. Vegetable samples were also taken at harvest time. Liquid hog manure, soil, and vegetable (washed and unwashed) samples were analyzed for the presence of Salmonella and E. coli. An exponential decrease of E. coli populations was observed in surface soil after the application of manure. The estimated average time required to reach undetectable concentrations of E. coli in sandy loam varied from 56 to 70 days, whereas the absence of E. coli was estimated at 77 days in loamy sand. The maximal Salmonella persistence in soil was 54 days. E. coli and Salmonella were not detected in any vegetable samples.
- Subjects :
- Salmonella
Time Factors
Soil test
Rain
Food Contamination
Biology
engineering.material
medicine.disease_cause
Microbiology
Crop
Escherichia coli
medicine
Animals
Humans
Longitudinal Studies
Soil Microbiology
Temperature
Manure
Horticulture
Consumer Product Safety
Loam
Soil water
Food Microbiology
engineering
Fertilizer
Cucumis sativus
Soil microbiology
Food Science
Subjects
Details
- ISSN :
- 0362028X
- Volume :
- 68
- Database :
- OpenAIRE
- Journal :
- Journal of Food Protection
- Accession number :
- edsair.doi.dedup.....cd143dcf0f14244e4c4803496a34ac02