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| Stohr, Valerie; Joffraud, Jean-jacques; Cardinal, Mireille; Leroi, Francoise. |
| Off-odours/flavours associated with cold-smoked salmon spoilage are due to the activity of microflora. This study evaluated the spoilage potential of nine bacterial groups (Shewanella putrefaciens, Brochothrix thermosphacta, Aeromonas spp., Lactobacillus alimentarius, Lactobacillus sake,Lactobacillus farciminis, Carnobacterium piscicola, Photobacterium phosphoreum and Serratia liquefaciens) isolated from cold-smoked salmon. Five different isolates from each group were inoculated into sterile cold-smoked salmon blocks, and chemical and sensory changes were studied after five weeks of storage in vacuum packs at 6 degreesC. Bacterial growth was monitored weekly during the storage period. A sensory profile was assigned to each group, Principal component... |
| Tipo: Text |
Palavras-chave: Sensory analysis; Spoilage potential; Bacteria; Cold smoked salmon. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/publication-578.pdf |
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| Brillet, Anne; Pilet, M; Prevost, H; Bouttefroy, A; Leroi, Francoise. |
| The aim of this study was to demonstrate the inhibitory capacity of Carnobacterium strains against a collection of Listeria monocytogenes strains in cold-smoked salmon (CSS). Methods and Results: Three bacteriocin-producing strains, Carnobacterium divergens V41, C. piscicola V1 and C. piscicola SF668, were screened for their antilisterial activity against a collection of 57 L. monocytogenes strains selected from the French smoked salmon industry, using an agar spot test. All the Listeria strains were inhibited but three different groups could be distinguished differing in sensitivity to the three Carnobacterium strains. However, C. divergens V41 always had the highest inhibitory effect. The antilisterial capacity was then tested in sterile CSS blocks... |
| Tipo: Text |
Palavras-chave: Listeria monocytogenes; Cold smoked salmon; Carnobacterium; Biopreservation; Bacteriocin. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/publication-610.pdf |
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| Leroi, Francoise; Joffraud, Jean-jacques; Chevalier, Frederique; Cardinal, Mireille. |
| Aims: The aim of the study was to assess the relationships between the remaining shelf-life (RSL) of cold-smoked salmon and various microbiological and physico-chemical parameters, using a multivariate data analysis in the form of stepwise forward multiple regression. Methods and Results: Thirteen batches of French cold-smoked salmon were analysed weekly during vacuum-packed storage at 5 degreesC for their lipid, water, salt, phenol, pH, total volatile basic nitrogen (TVBN) and trimethylamine contents, total psychrotrophic count, lactic acid bacteria, lactobacilli, B. thermosphacta, Enterobacteriaceae and yeast counts. At the sensory rejection time, the flora was dominated by lactobacilli, lactobacilli/Enterobacteriaceae or Carnobacteria/B. thermosphacta.... |
| Tipo: Text |
Palavras-chave: Microbiological; Parameters; Regression; Cold smoked salmon. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/publication-609.pdf |
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| Joffraud, Jean-jacques; Cardinal, Mireille; Cornet, Josiane; Chasles, Jean-sebastien; Leon, Sandrine; Gigout, Frederique; Leroi, Francoise. |
| Cold-smoked salmon is a lightly preserved fish product in which a mixed microbial flora develops during storage and where the interactive behaviour of micro-organisms may contribute to their growth and spoilage activity. The aim of this study was to assess the effect of the bacterial interactions between the main species contaminating the cold-smoked salmon on bacterial growth, chemical and sensory changes, and spoilage. First, Carnobacterium piscicola, Photobacterium phosphoreum, Lactobacillus sakei, Vibrio sp., Brochothrix thermosphacta and Serratia liquefaciens-like were inoculated as pure cultures on sterile cold-smoked salmon. All bacterial species grew well; Vibrio sp. was the fastest and L. sakei strains developed very rapidly as well with a high... |
| Tipo: Text |
Palavras-chave: Spoilage; Interaction; Microbial flora; Cold smoked salmon. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1727.pdf |
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| Richard, Christelle; Leroi, Francoise; Brillet-viel, Anne; Rachman, Cinta; Connil, Nathalie; Drider, Djamel; Pilet, Marie-france; Onno, Bernard; Dousset, Xavier; Prevost, Hervé. |
| The interest of biopreservation using lactic bacteria to improve the food security of smoked salmon was evaluated. Cold smoked salmon is a non-stable microbiological product whose physicochemical characteristics allow the development of Listeria monocytogenes which constitutes the major microbiological risk depending on the consumption of this product. Biodiversity of the microflora of smoked salmon and its evolution during conservation, the origin of the contamination by Listeria and its consequences, and the parameters of the manufacturing process allowing a better control of microbiological quality are discussed. The innovating concept of biopreservation of smoked salmon is developed. It consists of an inoculation of salmon by a competitive lactic flora... |
| Tipo: Text |
Palavras-chave: Saumon fumé; Bactérie lactique; Biopréservation; Listeria; Carnobacterium; Cold smoked salmon; Lactic acid bacteria; Biopreservation; Listeria; Carnobacterium. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/00000/10768/7509.pdf |
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| Giacomazzi, Sophie; Leroi, Francoise; Joffraud, Jean-jacques. |
| Aims: To compare three bacterial DNA extraction procedures on cold-smoked salmon (CSS) and assess the impact on their efficiency of two physical treatments of the food matrix, ionizing irradiation and freezing. Methods and Results: As molecular methods for bacterial detection have become an important analytical tool, we compared bacterial DNA extraction procedures on CSS. Working with frozen and irradiated CSS, we obtained negative responses from samples known to be highly contaminated. Thus, we decided to study the impact of these two physical treatments on bacterial DNA extraction procedures. The efficiency of bacterial DNA extraction directly from the fish matrix suspension was measured by an rpoB PCR-based reaction. The results demonstrated that the... |
| Tipo: Text |
Palavras-chave: RpoB gene; PCR; Ionizing irradiation; Freezing; DNA extraction; Cold smoked salmon. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-1106.pdf |
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| Joffraud, Jean-jacques; Leroi, Francoise; Roy, Caroline; Berdague, J. |
| This study investigated the volatile compounds produced by bacteria belonging to nine different bacterial groups: Lactobacillus sake, L. farciminis, L. alimentarius. Carnobacterium piscicola, Aeromonas sp., Shewanella putefaciens. Brochothrix thermosphacta, Photobacterium phosphoreum and Enterobacteriaceae isolated from cold-smoked salmon. Each bacterial group was represented by several strains. In addition, combinations of the groups were examined as well. Sterile blocks of cold-smoked salmon were inoculated, vacuum-packed and stored at 6 degreesC. After 40 days of storage at 6 degreesC, aerobic viable count and pH were recorded, the volatile fraction of the samples was analysed by gas chromatography-mass spectrometry (GC-MS). and spoilage was assessed by... |
| Tipo: Text |
Palavras-chave: Volatile compounds; Bacteria; Spoilage; Cold smoked salmon. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/publication-492.pdf |
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