Modelling the competitive growth between Listeria monocytogenes and biofilm microflora of smear cheese wooden shelves

The aim of this study was to investigate the mechanism of the observed inhibition of Listeria monocytogenes by the natural biofilm microflora (BM) on wooden shelves used in the ripening of a soft and smear cheese. For this, BM was harvested and we conducted a series of experiments in which two strai...

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Bibliographic Details
Published in:International journal of food microbiology 2008-11, Vol.128 (1), p.51-57
Main Authors: Guillier, L., Stahl, V., Hezard, B., Notz, E., Briandet, R.
Format: Article
Language:English
Subjects:
Antibiosis
bacterial colonization
Biofilm
Biofilms - growth & development
Biological and medical sciences
Cheese - microbiology
Cheese ripening
Coculture Techniques
Food Contamination - analysis
Food Contamination - prevention & control
Food Handling - methods
Food industries
Food Microbiology
food pathogens
Fundamental and applied biological sciences. Psychology
intraspecific competition
Jameson effect
Kinetics
Life Sciences
Listeria monocytogenes
Listeria monocytogenes - growth & development
Listeria monocytogenes - pathogenicity
Listeria monocytogenes - physiology
microbial competition
microbial growth
Microbial interaction
Milk and cheese industries. Ice creams
model food systems
Population Density
smear cheese
soft cheeses
statistical models
Wood - microbiology
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Summary:The aim of this study was to investigate the mechanism of the observed inhibition of Listeria monocytogenes by the natural biofilm microflora (BM) on wooden shelves used in the ripening of a soft and smear cheese. For this, BM was harvested and we conducted a series of experiments in which two strains of L. monocytogenes were co-cultured with BM on glass fiber filters deposited on model cheeses. Compared to monoculture, L. monocytogenes growth rate in co-culture was not reduced but the growth of the pathogen stopped as soon as BM entered the stationary phase. This reduction in maximum population density can be explained by nutrient consumption and exhaustion by BM as no production of inhibitors by BM has been detected. This mechanism of pathogen inhibition has been previously described as the “Jameson effect”.
ISSN:0168-1605
1879-3460
DOI:10.1016/j.ijfoodmicro.2008.06.028