| Effect of oxygen concentration and redox potential on recovery of sublethally heat-damaged cells of Escherichia coli O157:H7, Salmonella enteritidis and Listeria monocytogenes. | |
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MedLine Citation:
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PMID: 9674145 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The measured heat resistance of cells of Escherichia coli O157:H7, Salmonella enteritidis and Listeria monocytogenes was up to eightfold greater when they were grown, heated and recovered anaerobically rather than aerobically. Measured heat resistance was highest when anaerobic gas mixtures were used (time at 59 degrees C for a 6-decimal (6-D) reduction of E. coli O157:H7, 19-24 min); moderate when low concentrations of oxygen (0.5-1%) were included (time for a 6-D reduction, 5-17 min); and lowest when higher concentrations of oxygen (2-40%) were used (time for a 6-D reduction, 3 min). This effect was principally attributed to the recovery conditions, and a greater effect was noted at lower heating temperatures. The use of reduced oxygen concentration (< 2% O2), e.g. packing under an anaerobic gas mixture or a vacuum, might therefore increase the risk of these pathogens surviving heat treatments applied to food. It is also possible that foods that are packed in air but with a low redox potential might allow the survival of heated cells, and thus the anticipated level of safety might not be achieved. |
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Authors:
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S M George; L C Richardson; I E Pol; M W Peck |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of applied microbiology Volume: 84 ISSN: 1364-5072 ISO Abbreviation: J. Appl. Microbiol. Publication Date: 1998 May |
Date Detail:
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Created Date: 1998-09-03 Completed Date: 1998-09-03 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 9706280 Medline TA: J Appl Microbiol Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 903-9 Citation Subset: IM |
Affiliation:
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Institute of Food Research, Colney, Norwich, UK. susie.george@BBSRC.ac.uk |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Aerobiosis Anaerobiosis Escherichia coli O157 / growth & development* Food Microbiology Hot Temperature* Humans Listeria monocytogenes / growth & development* Oxidation-Reduction Oxygen / pharmacology* Salmonella enteritidis / growth & development* |
| Chemical | |
Reg. No./Substance:
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7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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