Diversity and assessment of potential risk factors of Gram-negative isolates associated with French cheeses
| Autor: | Nathalie Desmasures, Emmanuel Coton, Monika Coton, Marie-Christine Montel, Anne Le Fleche, Valérie Stahl, Céline Delbès-Paus, Françoise Irlinger |
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| Přispěvatelé: | Unité Mixte de Recherche Fromagère (UMRF), Institut National de la Recherche Agronomique (INRA), Génie et Microbiologie des Procédés Alimentaires (GMPA), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, Microorganismes d'Intérêt Laitier et Alimentaire (MILA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU) |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
[SDV.SA]Life Sciences [q-bio]/Agricultural sciences
Biogenic amines Molecular Sequence Data Food Contamination fromage résistance aux antibiotiques Chryseobacterium Microbiology Serratia produit laitier biodiversité 03 medical and health sciences Cheese Drug Resistance Bacterial medicine Animals Psychrobacter Antibiotic resistances 030304 developmental biology 2. Zero hunger 0303 health sciences Halomonas biology 030306 microbiology Pseudomonas Enterobacter Biodiversity biology.organism_classification amine biogène Anti-Bacterial Agents Gram-negative bacteria Dairy products Risk factors Milk facteur de risque Consumer Product Safety bactérie gram négatif Colistin Cattle France Stenotrophomonas Food Science medicine.drug |
| Zdroj: | Food Microbiology Food Microbiology, Elsevier, 2012, 29 (1), pp.88-98. ⟨10.1016/j.fm.2011.08.020⟩ Food Microbiology 1 (29), 88-98. (2012) |
| ISSN: | 0740-0020 1095-9998 |
| DOI: | 10.1016/j.fm.2011.08.020⟩ |
| Popis: | The goal of this study was to identify at the species level a large collection of Gram-negative dairy bacteria isolated from milks or semi-hard and soft, smear-ripened cheeses (cheese core or surface samples) from different regions of France. The isolates were then assessed for two risk factors, antibiotic resistance and volatile and non-volatile biogenic amine production in vitro. In total, 173 Gram-negative isolates were identified by rrs and/or rpoB gene sequencing. A large biodiversity was observed with nearly half of all Gram-negative isolates belonging to the Enterobacteriaceae family. Overall, 26 different genera represented by 68 species including potential new species were identified among the studied Gram-negative isolates for both surface and milk or cheese core samples. The most frequently isolated genera corresponded to Pseudomonas, Proteus, Psychrobacter, Halomonas and Serratia and represented almost 54% of the dairy collection. After Pseudomonas, Chryseobacterium, Enterobacter and Stenotrophomonas were the most frequently isolated genera found in cheese core and milk samples while Proteus, Psychrobacter, Halomonas and Serratia were the most frequently isolated genera among surface samples. Antibiotic resistance profiles indicated that resistances to the aminosid, imipemen and quinolon were relatively low while more than half of all tested isolates were resistant to antibiotics belonging to the monobactam, cephem, fosfomycin, colistin, phenicol, sulfamid and some from the penam families. Thirty-six% of isolates were negative for in vitro biogenic amine production. Among biogenic amine-producers, cadaverine was the most frequently produced followed by isoamylamine, histamine and putrescine. Only low levels ( |
| Databáze: | OpenAIRE |
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