Document Detail


Inhibition of Listeria monocytogenes in cooked ham through active packaging with natural antimicrobials and high-pressure processing.
MedLine Citation:
PMID:  18044426     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Enterocins A and B and sakacin K at 200 and 2,000 activity units (AU)/cm2, nisin at 200 AU/cm2, 1.8% potassium lactate, and a combination of 200 AU/cm2 of nisin and 1.8% lactate were incorporated into interleavers, and their effectiveness against Listeria monocytogenes spiked in sliced, cooked ham was evaluated. Antimicrobial-packaged cooked ham was then subjected to high-pressure processing (HPP) at 400 MPa. In nonpressurized samples, nisin plus lactate-containing interleavers were the most effective, inhibiting L. monocytogenes growth for 30 days at 6 degrees C, with counts that were 1.9 log CFU/g lower than in the control after 3 months. In the other antimicrobial-containing interleavers, L. monocytogenes did not exhibit a lag phase and progressively grew to levels of about 8 log CFU/g. HPP of actively packaged ham slices reduced Listeria populations about 4 log CFU/g in all batches containing bacteriocins (i.e., nisin, sakacin, and enterocins). At the end of storage, L. monocytogenes levels in the bacteriocin-containing batches were the lowest, with counts below 1.51 log CFU/g. In contrast, HPP moderately reduced L. monocytogenes counts in the control and lactate batches, with populations gradually increasing to about 6.5 log CFU/g at the end of storage.
Authors:
Anna Jofré; Margarita Garriga; Teresa Aymerich
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of food protection     Volume:  70     ISSN:  0362-028X     ISO Abbreviation:  J. Food Prot.     Publication Date:  2007 Nov 
Date Detail:
Created Date:  2007-11-29     Completed Date:  2007-12-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7703944     Medline TA:  J Food Prot     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2498-502     Citation Subset:  IM    
Affiliation:
IRTA, Finca Camps i Armet, E-17121 Monells, Girona, Spain.
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MeSH Terms
Descriptor/Qualifier:
Animals
Anti-Bacterial Agents / pharmacology*
Bacteriocins / pharmacology
Bridged Compounds / pharmacology
Colony Count, Microbial
Dose-Response Relationship, Drug
Food Contamination / analysis,  prevention & control
Food Handling / methods*
Food Microbiology
Food Packaging / methods*
Food Preservation / methods*
Lactates / pharmacology
Listeria monocytogenes / drug effects,  growth & development*
Meat Products / microbiology*
Nisin / pharmacology
Pressure
Swine
Chemical
Reg. No./Substance:
0/Anti-Bacterial Agents; 0/Bacteriocins; 0/Bridged Compounds; 0/Lactates; 1414-45-5/Nisin; 59678-46-5/enterocin

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