Document Detail


Synergistic bactericidal effect of simultaneous near-infrared radiant heating and UV radiation against Cronobacter sakazakii in powdered infant formula.
MedLine Citation:
PMID:  24413596     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The aim of this study was to investigate the synergistic bactericidal effects of the simultaneous application of near-infrared (NIR) heating and UV irradiation against Cronobacter sakazakii in powdered infant formula and to determine the effect on quality by measuring color changes and performing sensory evaluation. A cocktail of C. sakazakii strains was inoculated into powdered infant formula, followed by NIR, UV, and NIR-UV combined treatment. The sum of NIR and UV inactivation was lower than that obtained by the simultaneous application of both technologies due to their synergism. Simultaneous NIR-UV combined treatment for 7 min achieved a 2.79-log CFU reduction of C. sakazakii. The underlying inactivation mechanisms of the NIR-UV combined treatment were evaluated by the propidium iodide (PI) uptake test, and we confirmed that disruption of the bacterial cell membrane was the main factor contributing to the synergistic lethal effect. Color values and sensory characteristics of NIR-UV simultaneously treated infant formula powder were not significantly (P > 0.05) different from the control. The results of this study suggest that a NIR-UV decontaminating system can be applied as an alternative to other interventions in powdered weaning foods.
Authors:
Jae-Won Ha; Dong-Hyun Kang
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-1-10
Journal Detail:
Title:  Applied and environmental microbiology     Volume:  -     ISSN:  1098-5336     ISO Abbreviation:  Appl. Environ. Microbiol.     Publication Date:  2014 Jan 
Date Detail:
Created Date:  2014-1-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7605801     Medline TA:  Appl Environ Microbiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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