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J Appl Microbiol


Title:Effects of Proteus vulgaris growth on the establishment of a cheese microbial community and on the production of volatile aroma compounds in a model cheese
Author(s):Deetae P; Mounier J; Bonnarme P; Spinnler HE; Irlinger F; Helinck S;
Address:"UMR 782 Genie et Microbiologie des Procedes Alimentaires, AgroParisTech/INRA, 78850 Thiverval-Grignon, France"
Journal Title:J Appl Microbiol
Year:2009
Volume:20090424
Issue:4
Page Number:1404 - 1413
DOI: 10.1111/j.1365-2672.2009.04315.x
ISSN/ISBN:1365-2672 (Electronic) 1364-5072 (Linking)
Abstract:"AIMS: To investigate the impact of Proteus vulgaris growth on a multispecies ecosystem and on volatile aroma compound production during cheese ripening. METHODS AND RESULTS: The microbial community dynamics and the production of volatile aroma compounds of a nine-species cheese ecosystem were compared with or without the presence of P. vulgaris in the initial inoculum. Proteus vulgaris was able to colonize the cheese surface and it was one of the dominant species, representing 37% of total isolates at the end of ripening with counts of 9.2 log(10) CFU g(-1). In the presence of P. vulgaris, counts of Arthrobacter arilaitensis, Brevibacterium aurantiacum and Hafnia alvei significantly decreased. Proteus vulgaris influenced the production of total volatile aroma compounds with branched-chain aldehydes and their corresponding alcohols being most abundant. CONCLUSIONS: Proteus vulgaris was able to successfully implant itself in a complex cheese ecosystem and significantly contributed to the organoleptic properties of cheese during ripening. This bacterium also interacted negatively with other bacteria in the ecosystem studied. SIGNIFICANCE AND IMPACT OF THE STUDY: This is the first time that the impact of a Gram-negative bacterium on cheese microbial ecology and functionality has been described"
Keywords:"Animals Bacteria/*growth & development/isolation & purification Cheese/*analysis/*microbiology Colony Count, Microbial Color Ecosystem Food Microbiology Gas Chromatography-Mass Spectrometry Hydrogen-Ion Concentration Organic Chemicals/*analysis Proteus vu;"
Notes:"MedlineDeetae, P Mounier, J Bonnarme, P Spinnler, H E Irlinger, F Helinck, S eng Research Support, Non-U.S. Gov't England 2009/05/12 J Appl Microbiol. 2009 Oct; 107(4):1404-13. doi: 10.1111/j.1365-2672.2009.04315.x. Epub 2009 Apr 24"

 
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