Behaviour of Listeria monocytogenes under combined chilling processes
Identifieur interne : 00C820 ( Main/Exploration ); précédent : 00C819; suivant : 00C821Behaviour of Listeria monocytogenes under combined chilling processes
Auteurs : J.-M. Membre [France] ; T. Ross [Australie] ; T. Mcmeekin [Australie]Source :
- Letters in applied microbiology [ 0266-8254 ] ; 1999.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Congélation.
English descriptors
- KwdEn :
Abstract
The behaviour of Lisleria monocytogenes under chilling processes was investigated. Growth kinetics were measured at 7 °C in TSBYE culture medium as a function of pH (7.2 and 6.2), pre-incubation temperatures (4 or 7 °C), cooling (0.05 or 0.1°C min-1) and freezing (0 and - 5°C) treatments. Growth curves generated were fitted by Gompertz and Baranyi functions. The Baranyi function gave better parameter estimation values than the Gompertz equation which over-estimated the specific growth rate values. Listeria monocytogenes grew at 7°C without a lag phase, except when the sub-culture was performed at 37°C, whereas the specific growth rate was affected by the chilling processes. In fact, L. monocytogenes grew slightly faster at 7 °C when a 4°C pre-incubation treatment was applied than with a 7 °C pre-incubation treatment. These results suggest that to mimic the processes of contamination in industry, predictive microbiology studies with L. monocytogenes should be performed with organisms cultured at low temperatures.
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Ross</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>School of Agricultural Science, University of Tasmania</s1><s2>Hobart, Tasmania</s2><s3>AUS</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Hobart, Tasmania</wicri:noRegion></affiliation></author><author><name sortKey="Mcmeekin, T" sort="Mcmeekin, T" uniqKey="Mcmeekin T" first="T." last="Mcmeekin">T. Mcmeekin</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>School of Agricultural Science, University of Tasmania</s1><s2>Hobart, Tasmania</s2><s3>AUS</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Hobart, Tasmania</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">99-0264869</idno><date when="1999">1999</date><idno type="stanalyst">PASCAL 99-0264869 INIST</idno><idno type="RBID">Pascal:99-0264869</idno><idno type="wicri:Area/PascalFrancis/Corpus">006367</idno><idno type="wicri:Area/PascalFrancis/Curation">006C87</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">006132</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">006132</idno><idno type="wicri:doubleKey">0266-8254:1999:Membre J:behaviour:of:listeria</idno><idno type="wicri:Area/Main/Merge">00D845</idno><idno type="wicri:Area/Main/Curation">00C820</idno><idno type="wicri:Area/Main/Exploration">00C820</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Behaviour of Listeria monocytogenes under combined chilling processes</title><author><name sortKey="Membre, J M" sort="Membre, J M" uniqKey="Membre J" first="J.-M." last="Membre">J.-M. Membre</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut National de la Recherche Agronomique</s1><s2>Villeneuve d'Asq</s2><s3>FRA</s3><sZ>1 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>Villeneuve d'Asq</wicri:noRegion><wicri:noRegion>Institut National de la Recherche Agronomique</wicri:noRegion><wicri:noRegion>Institut National de la Recherche Agronomique</wicri:noRegion></affiliation></author><author><name sortKey="Ross, T" sort="Ross, T" uniqKey="Ross T" first="T." last="Ross">T. Ross</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>School of Agricultural Science, University of Tasmania</s1><s2>Hobart, Tasmania</s2><s3>AUS</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Hobart, Tasmania</wicri:noRegion></affiliation></author><author><name sortKey="Mcmeekin, T" sort="Mcmeekin, T" uniqKey="Mcmeekin T" first="T." last="Mcmeekin">T. Mcmeekin</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>School of Agricultural Science, University of Tasmania</s1><s2>Hobart, Tasmania</s2><s3>AUS</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Hobart, Tasmania</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Letters in applied microbiology</title><title level="j" type="abbreviated">Lett. appl. microbiol.</title><idno type="ISSN">0266-8254</idno><imprint><date when="1999">1999</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Letters in applied microbiology</title><title level="j" type="abbreviated">Lett. appl. microbiol.</title><idno type="ISSN">0266-8254</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Biological contamination</term><term>Cooling</term><term>Freezing</term><term>Heat treatment</term><term>Impact study</term><term>Kinetics</term><term>Listeria monocytogenes</term><term>Microorganism growth</term><term>Pathogenic</term><term>Pretreatment</term><term>Prevention</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Etude impact</term><term>Listeria monocytogenes</term><term>Traitement thermique</term><term>Refroidissement</term><term>Congélation</term><term>Multiplication microorganisme</term><term>Cinétique</term><term>Prétraitement</term><term>Contamination biologique</term><term>Prévention</term><term>Pathogène</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Congélation</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The behaviour of Lisleria monocytogenes under chilling processes was investigated. Growth kinetics were measured at 7 °C in TSBYE culture medium as a function of pH (7.2 and 6.2), pre-incubation temperatures (4 or 7 °C), cooling (0.05 or 0.1°C min<sup>-1</sup>) and freezing (0 and - 5°C) treatments. Growth curves generated were fitted by Gompertz and Baranyi functions. The Baranyi function gave better parameter estimation values than the Gompertz equation which over-estimated the specific growth rate values. Listeria monocytogenes grew at 7°C without a lag phase, except when the sub-culture was performed at 37°C, whereas the specific growth rate was affected by the chilling processes. In fact, L. monocytogenes grew slightly faster at 7 °C when a 4°C pre-incubation treatment was applied than with a 7 °C pre-incubation treatment. These results suggest that to mimic the processes of contamination in industry, predictive microbiology studies with L. monocytogenes should be performed with organisms cultured at low temperatures.</div></front></TEI><affiliations><list><country><li>Australie</li><li>France</li></country></list><tree><country name="France"><noRegion><name sortKey="Membre, J M" sort="Membre, J M" uniqKey="Membre J" first="J.-M." last="Membre">J.-M. Membre</name></noRegion></country><country name="Australie"><noRegion><name sortKey="Ross, T" sort="Ross, T" uniqKey="Ross T" first="T." last="Ross">T. Ross</name></noRegion><name sortKey="Mcmeekin, T" sort="Mcmeekin, T" uniqKey="Mcmeekin T" first="T." last="Mcmeekin">T. Mcmeekin</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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