Document Detail


Development of a structure-based model for the competitive growth of Listeria innocua in minced chicken breasts.
MedLine Citation:
PMID:  20579759     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Most predictive models are based on planktonic microbial growth in broth and, therefore, do not deal with diffusional limitations generated by the solid-food structure. Recently, a few approaches have incorporated the diffusional component, but still on the basis of pure cultures growing in homogenous supports. In this work, a transport-phenomenon model that considers the complex and dynamic structure of real foods, as well as its background microflora, has been developed. This structure-based model was applied to the competitive growth of Listeria innocua in minced chicken breasts, considering oxygen as the limiting substrate. Physical structure and microbial growth in minced meat were compared to those reported for meat-based kappa-carrageenan gels by means of scanning electron microscopy (SEM) and viable counts. In both systems, microbial growth was affected by diffusional limitations, as compared with broth cultures. However, significant differences in their physical structure and a key effect of the indigenous microflora and the meat tissue itself, resulted in different extent and distribution of microbial growth. The approach here developed, useful for food safety purposes, has been shown to provide a reasonably good simulation of experimental data in minced breasts.
Authors:
E Noriega; A Laca; M Díaz
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-06-04
Journal Detail:
Title:  International journal of food microbiology     Volume:  142     ISSN:  1879-3460     ISO Abbreviation:  Int. J. Food Microbiol.     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-08-10     Completed Date:  2010-11-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8412849     Medline TA:  Int J Food Microbiol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  44-52     Citation Subset:  IM    
Copyright Information:
Copyright 2010 Elsevier B.V. All rights reserved.
Affiliation:
Department of Chemical Engineering and Environmental Technology, Faculty of Chemistry, University of Oviedo, Oviedo, Spain.
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MeSH Terms
Descriptor/Qualifier:
Animals
Chickens
Listeria / growth & development*,  metabolism
Meat / microbiology*
Models, Biological
Oxygen / metabolism
Chemical
Reg. No./Substance:
7782-44-7/Oxygen

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


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