Document Detail


The combined effect of high hydrostatic pressure and mild heat on inactivation of pathogens in milk and poultry.
MedLine Citation:
PMID:  9709206     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The combined effects of high hydrostatic pressure and heat on the inactivation of Escherichia coli O157:H7 NCTC 12079 and Staphylococcus aureus NCTC 10652 in poultry meat and ultra-high-temperature-treated (UHT) milk were investigated. The to have a significant effect on the survival of the pathogens during treatment. For E. coli O157:H7, a 15-min treatment of 400 MPa at 50 degrees C resulted in approximately a 6.0-log10 reduction in CFU/g in poultry meat and a 5.0-log10 reduction in UHT milk; however, a < 1-log10 reduction was achieved with either treatment alone. In contrast, for S. aureus, a 15-min treatment of 500 MPa at 50 degrees C was required to achieve a 5.0-log10 reduction in poultry meat and a 6.0-log10 reduction in UHT milk. As before, a < 1-log10 reduction in numbers was achieved with either treatment alone. The pressure-temperature inactivation curves of each organism, in each substrate, were fitted using the Gompertz equation. Polynomial expression derived from the Gompertz variables were used to devise simple models which predicted the inactivation of each pathogen at various pressure-temperature combinations. Thus, a number of different pressure-temperature conditions could be chosen to achieve a desired inactivation level. The use of such models will provide flexibility in selecting optimum pressure conditions without compromising microbiological safety.
Authors:
M F Patterson; D J Kilpatrick
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of food protection     Volume:  61     ISSN:  0362-028X     ISO Abbreviation:  J. Food Prot.     Publication Date:  1998 Apr 
Date Detail:
Created Date:  1998-09-17     Completed Date:  1998-09-17     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  7703944     Medline TA:  J Food Prot     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  432-6     Citation Subset:  IM    
Affiliation:
Department of Food Science, Queen's University of Belfast, Northern Ireland, UK. m.patterson@qub.ac.uk
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MeSH Terms
Descriptor/Qualifier:
Animals
Disinfection / methods*
Escherichia coli O157 / growth & development
Food Microbiology
Hot Temperature*
Hydrostatic Pressure*
Milk / microbiology*
Poultry Products / microbiology*
Staphylococcus aureus / growth & development
Time Factors

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


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