Article (Scientific journals)
Study of the microbial diversity of a panel of Belgian artisanal cheeses associated with challenge studies for Listeria monocytogenes
Gerard, Amaury; El-Hajjaji, Soundous; Burteau, Sophie et al.
2021In Food Microbiology, 100, p. 103861
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Keywords :
Metagenetics; Cheese; Bacteria; 16S rRNA gene; Ecology; Challenge studies; Listeria monocytogenes; Métagénétique; Fromage; Bactéries; gène codant pour l'ARNr 16S; Ecologue; Tests de provocation
Abstract :
[en] High throughput sequencing could become a powerful tool in food safety. This study was the first to investigate artisanal cheeses from Belgium (31 batches) using metagenetics, in relation to Listeria monocytogenes growth data acquired during a previous project. Five cheese types were considered, namely unripened acid-curd cheeses, smear- and mold-ripened soft cheeses, and Gouda-type and Saint-Paulin-type cheeses. Each batch was analyzed in triplicate the first and the last days of storage at 8 °C. Globally, 2697 OTUs belonging to 277 genera and to 15 phyla were identified. Lactococcus was dominant in all types, but Streptococcus was co-dominant in smear-ripened soft cheeses and Saint-Paulin-type cheeses. The dominant population was not always associated with added starter cultures. Bacterial richness and diversity were significantly higher in both types of soft cheeses than in other categories, including particular genera like Prevotella, Faecalibacterium and Hafnia-Obesumbacterium in mold-ripened cheeses and Brevibacterium, Brachybacterium, Microbacterium, Bacteroides, Corynebacterium, Marinilactibacillus, Fusobacterium, Halomonas and Psychrobacter in smear-ripened soft cheeses. A strong correlation was observed between no growth of L. monocytogenes in a smear-ripened cheese and the presence of an unknown Fusobacterium (relative abundance around 10%). This in silico correlation should be confirmed by further experiments in vitro and in situ.
Disciplines :
Microbiology
Author, co-author :
Gerard, Amaury ;  Université de Liège - ULiège > Département GxABT > Chimie des agro-biosystèmes
El-Hajjaji, Soundous ;  Université de Liège - ULiège > TERRA Research Centre
Burteau, Sophie
Fall, Papa Abdoulaye
Pirard, Barbara ;  Université de Liège - ULiège > Département de sciences des denrées alimentaires (DDA) > Analyse des denrées alimentaires
Taminiau, Bernard  ;  Université de Liège - ULiège > Département de sciences des denrées alimentaires (DDA) > Microbiologie des denrées alimentaires
Daube, Georges  ;  Université de Liège - ULiège > Département de sciences des denrées alimentaires (DDA) > Microbiologie des denrées alimentaires
Sindic, Marianne  ;  Université de Liège - ULiège > Département GxABT > Chimie des agro-biosystèmes
Language :
English
Title :
Study of the microbial diversity of a panel of Belgian artisanal cheeses associated with challenge studies for Listeria monocytogenes
Alternative titles :
[fr] Etude de la diversité microbienne d'un panel de fromages artisanaux belges, en lien avec des tests de provocation pour Listeria monocytogenes
Publication date :
13 June 2021
Journal title :
Food Microbiology
ISSN :
0740-0020
eISSN :
1095-9998
Publisher :
Elsevier, United States
Volume :
100
Pages :
103861
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
Available on ORBi :
since 25 July 2021

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