Document Detail

Reduction of Listeria on ready-to-eat sausages after exposure to a combination of pulsed light and nisin.
MedLine Citation:
PMID:  19350979     Owner:  NLM     Status:  MEDLINE    
The risk of listeriosis associated with ready-to-eat foods is a major concern in the United States. Pulsed light (PL) treatment has been effective for killing Listeria. The possibility of enhancing the antilisterial capability of PL treatment by combining PL with an additional hurdle, the natural antimicrobial nisin, was explored in this study. First, the ability of Listeria innocua to mimic the response of Listeria monocytogenes to PL treatment was demonstrated. Subsequently, a series of inoculation studies was performed in which canned sausages were surface inoculated with L. innocua as a surrogate for L. monocytogenes and then treated with a commercial preparation of nisin (Nisaplin), PL, or a combination of the two treatments. The application of a Nisaplin dip alone resulted in an immediate reduction of L. innocua by 2.35 +/- 0.09 log CFU. PL reduced L. innocua by 1.37 +/- 0.30 log CFU after exposure to 9.4 J/cm2. A total reduction of 4.03 +/- 0.15 log CFU was recorded after the combined treatment of Nisaplin and PL for 48 h at 4 degrees C. The long-term survival of L. innocua was evaluated on sausages stored at 4 degrees C. Treatment with Nisaplin and PL resulted in a 4- to 5-log reduction for two replicate studies. The combination treatment resulted in no significant microbial growth during 28 and 48 days of refrigerated storage in the first and second replicates, respectively. These results suggest that this combination treatment can be used as an effective antilisterial step in the production of ready-to-eat foods.
Aaron R Uesugi; Carmen I Moraru
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of food protection     Volume:  72     ISSN:  0362-028X     ISO Abbreviation:  J. Food Prot.     Publication Date:  2009 Feb 
Date Detail:
Created Date:  2009-04-08     Completed Date:  2009-04-27     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7703944     Medline TA:  J Food Prot     Country:  United States    
Other Details:
Languages:  eng     Pagination:  347-53     Citation Subset:  IM    
Department of Food Science, Cornell University, Stocking Hall, Ithaca, New York 14853, USA.
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MeSH Terms
Anti-Bacterial Agents / pharmacology*
Colony Count, Microbial
Consumer Product Safety
Food Irradiation*
Food Microbiology
Food Preservation / methods*
Listeria / drug effects,  growth & development*,  radiation effects
Meat Products / microbiology*
Nisin / pharmacology*
Time Factors
Ultraviolet Rays
Reg. No./Substance:
0/Anti-Bacterial Agents; 1414-45-5/Nisin

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

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