Document Detail


Survival and growth of Enterobacter sakazakii on fresh-cut fruits and vegetables and in unpasteurized juices as affected by storage temperature.
MedLine Citation:
PMID:  16355824     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Enterobacter sakazakii is an emerging foodborne pathogen that has caused illnesses and deaths in infants and elderly immunocompromised adults. Outbreaks of E. sakazakii infection have been associated with infant formulas, but the documented presence of this pathogen in a wide variety of ready-to-eat foods, including lettuce and other raw vegetables, makes it important to learn more about its behavior in these environments. We investigated the survival and growth characteristics of E. sakazakii on fresh-cut apple, cantaloupe, strawberry, watermelon, cabbage, carrot, cucumber, lettuce, and tomato and in juices prepared from these fruits and vegetables. Produce and juices were inoculated with E. sakazakii at 2 to 3 log CFU/g and 1 to 2 log CFU/ml, respectively, and stored at 4, 12, or 25 degrees C. Populations either did not change or gradually decreased in fresh-cut produce and juices stored at 4 degrees C but grew at 12 degrees C on fresh-cut apple, cantaloupe, watermelon, cucumber, and tomato and in all juices except apple, strawberry, cabbage, and tomato juices. All fresh-cut fruits and vegetables except strawberry supported growth of E. sakazakii at 25 degrees C. Growth occurred in all juices except apple, strawberry, and cabbage juices, followed by decreases in population to < 1 CFU/ml after 48 to 72 h, which coincided with decreases in pH and an increase in the population of lactic acid bacteria. Increases in total counts occurred in all juices except strawberry juice stored at 25 degrees C and apple and strawberry juices stored at 12 degrees C. Total counts increased in cantaloupe, carrot, cucumber, and lettuce juices stored at 4 degrees C. Populations of molds and yeasts increased in apple and tomato juices stored at 25 degrees C but decreased to <1 CFU/ml in cabbage, lettuce, and cucumber juices. Further characterization of the behavior of E. sakazakii on fresh produce and in unpasteurized juice as affected by commercial packaging and handling practices is needed.
Authors:
Hoikyung Kim; Larry R Beuchat
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of food protection     Volume:  68     ISSN:  0362-028X     ISO Abbreviation:  J. Food Prot.     Publication Date:  2005 Dec 
Date Detail:
Created Date:  2005-12-16     Completed Date:  2006-01-10     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7703944     Medline TA:  J Food Prot     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2541-52     Citation Subset:  IM    
Affiliation:
Center for Food Safety and Department of Food Science and Technology, University of Georgia, 1109 Experiment Street, Griffin, Georgia 30223-1797, USA.
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MeSH Terms
Descriptor/Qualifier:
Beverages / microbiology*
Colony Count, Microbial
Consumer Product Safety
Enterobacter sakazakii / growth & development*
Food Handling / methods*
Food Microbiology
Fruit / microbiology*
Humans
Temperature
Time Factors
Vegetables / microbiology*

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


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