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Absence of Listeria monocytogenes growth during raw milk cheesemaking: a modelling approach
Jordan, Kieran; Schvartzman Echenique, Maria Sol; Maffre, A et al.
2010ISOPOL XVII satellite event ~(International Symposium On Problems Of Listeriosis)
 

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Keywords :
Listeria monocytogenes; cheese; predictive microbiology
Abstract :
[en] The presence of Listeria monocytogenes in certain foods and the risk that this poses to public health and food quality is still a problem. Currently, the field of food mi- crobiology focuses on obtaining data on the behaviour of microorganisms in food, but the responses obtained provide little insight into the relationship between physiological processes and growth or survival. This link can be made through mathematical models. In a simple form, a mathematical model is a simple mathe- matical description of a process. The application of mathematical models to food microbiology has been developed in recent years and now constitutes a new disci- pline named as Predictive Microbiology. However, most predictive models are based on laboratory experiments in microbiological media under static conditions. As such models tend to be inaccurate, we have undertaken our experiments in a food system under dynamic conditions. Cheese was made with raw and pasteurised milk deliberately contaminated with L. monocytogenes . Listeria was monitored through the manufacture and ripening period of the cheese. The results showed that L. monocytogenes did not grow during manufacture of raw milk cheese, but did grow during manufacture of pasteurised milk cheese. The data obtained for growth, survival and inactivation was modelled. The application of models that can explain the behaviour of Listeria in cheese and the further predictions that can be obtained from these models are useful for the improvement of ongoing re- search on biotraceability and for the better understanding of the general behaviour of these microorganisms under dynamic conditions, such as in dairy products
Disciplines :
Food science
Author, co-author :
Jordan, Kieran
Schvartzman Echenique, Maria Sol ;  Université de Liège - ULiège > Département des sciences de la vie > Génomique fonctionnelle et imagerie moléculaire végétale
Maffre, A
Sanaa, M
Butler, F
Gonzales-Baron, U
Tenenhaus-Aziza, F
Language :
English
Title :
Absence of Listeria monocytogenes growth during raw milk cheesemaking: a modelling approach
Publication date :
May 2010
Event name :
ISOPOL XVII satellite event ~(International Symposium On Problems Of Listeriosis)
Event organizer :
niversidade Católica Portuguesa– Escola Superior de Biotecnologia
Event place :
Porto, Portugal
Event date :
05-05-2010 to 08-05-2010
Audience :
International
Available on ORBi :
since 14 January 2015

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