Document Detail

Natural-light labeling of tomatoes does not facilitate growth or penetration of Salmonella into the fruit.
MedLine Citation:
PMID:  21219748     Owner:  NLM     Status:  MEDLINE    
The survival-growth capacity of Salmonella populations on tomato epidermis labeled by a natural-light labeling system was investigated after persistent fears of such marks serving as possible entryways for the pathogenic organisms, alone and in the presence of Pectobacterium carotovorum subsp. carotovorum, a soft-rot organism. Different treatments involving natural-light labeling, fruit waxing, and a five-strain cocktail of Salmonella were applied to mature green tomato surfaces in different sequences prior to storage at 4, 12, or 25°C. Fruit was sampled every 3 days, and Salmonella was enumerated from all treatments and unlabeled fruit, which served as controls. There were no significant differences between treatments or between treatments and controls throughout. The results indicate that the cuticle and epidermal interruptions caused by natural-light labeling do not facilitate the penetration and colonization of the tomato pericarp. In a separate set of experiments, the capacity of Salmonella to penetrate tomato in the presence of a potential synergism with P. carotovorum subsp. carotovorum was investigated. The addition of P. carotovorum at higher, lower, or equal population densities to Salmonella did not significantly alter the behavior of Salmonella on tomatoes stored at 25°C, regardless of natural-light labeling. The inability of P. carotovorum and Salmonella to colonize natural-light-etched surfaces of tomato fruit indicates that the use of this technology does not adversely compromise the surface of tomatoes.
Michelle D Danyluk; Lenin O Interiano Villeda; Loretta M Friedrich; Keith R Schneider; Ed Etxeberria
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of food protection     Volume:  73     ISSN:  1944-9097     ISO Abbreviation:  J. Food Prot.     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2011-01-11     Completed Date:  2011-01-31     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7703944     Medline TA:  J Food Prot     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2276-80     Citation Subset:  IM    
Citrus Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, 700 Experiment Station Road, Lake Alfred, Florida 33850, USA.
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MeSH Terms
Colony Count, Microbial
Food Microbiology
Food Preservation / methods*
Lycopersicon esculentum / microbiology*
Pectobacterium carotovorum / physiology*
Population Dynamics
Salmonella / growth & development*
Salmonella Food Poisoning / prevention & control

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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