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Zheng SS, Wang CY, Hu YY, Yang L, Xu BC. Enhancement of fermented sausage quality driven by mixed starter cultures: Elucidating the perspective of flavor profile and microbial communities. Food Res Int 2024; 178:113951. [PMID: 38309873 DOI: 10.1016/j.foodres.2024.113951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 12/20/2023] [Accepted: 01/02/2024] [Indexed: 02/05/2024]
Abstract
The metabolic activities of microorganisms play a crucial role in the quality development of fermented sausage. This study investigated the effect of inoculation with different combinations of starter cultures (Lactiplantibacillus plantarum YR07, Latilactobacillus sakei L.48, Staphylococcus xylosus S.14, and Mammaliicoccus sciuri S.18) on the quality of sausages. Inoculation with mixed starter cultures promoted protein degradation to generate amino acids and the conversion to volatile compounds, which enhanced the flavor development in fermented sausages. The bacterial community analyses demonstrated that the inoculation of mixed starter cultures could inhibit the growth of spoilage and pathogenic bacteria, thereby reducing the total content of biogenic amines. The correlation analysis between the core bacteria and characteristic volatile compounds revealed that fermented sausages inoculated with Lactobacillus and coagulase negative staphylococci exhibited significant positive correlations with the majority of key characteristic volatile compounds. In four treatments, inoculation with L. plantarum YR07 and M. sciuri S.18 greatly promoted the formation of characteristic volatile compounds (3-hydroxy-2-butanone, hexanal, and 1- octen-3ol). Therefore, the combined inoculation of L. plantarum YR07 and M. sciuri S.18 is promising to enhance fermented sausage's flavor profile and safety.
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Affiliation(s)
- Sha-Sha Zheng
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China; Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China
| | - Chun-Yu Wang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China; College of Food Science and Light Industry, Nanjing Tech University, Nanjing, 211816, China
| | - Ying-Ying Hu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China; Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China
| | - Liu Yang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China; Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China
| | - Bao-Cai Xu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China; Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China.
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Galante N, Palavecino Prpich N, Campos C, Cayré ME, Castro M. Alternative culture medium design for biomass production of autochthonous meat starter Latilactobacillus sakei sp. sakei ACU-2. Sci Rep 2023; 13:5205. [PMID: 36997546 PMCID: PMC10063532 DOI: 10.1038/s41598-023-29502-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 02/06/2023] [Indexed: 04/03/2023] Open
Abstract
The autochthonous strain Latilactobacillus sakei sp. sakei ACU-2 was selected as a meat starter culture for dry sausage production. Transferring this strain from laboratory scale to industry requires an increase in biomass production, while lowering process costs. In this study, a combination of techniques was applied in order to optimize the culture medium composition to enhance biomass production of L. sakei ACU-2. One variable at a time experiments, Plackett-Burman design, and mixture design were performed to fulfill the strain nutritional requirements. Eventually, the optimized formulation contained 19.46 g/L yeast extract; 8.28 g/L whey protein concentrate; 2.26 g/L soy peptone; 30 g/L cerelose; 1 g/L Tween 80; 5 g/L sodium acetate; 0.2 g/L magnesium sulfate and 0.05 g/L manganese sulfate. When L. sakei ACU-2 was cultivated in a bioreactor using the alternative medium, an enhancement of 75.5% of biomass production was achieved, in comparison to its growth in the commercial de Man, Rogosa, and Sharpe medium. Furthermore, a reduction of 62-86% of the cost was also attained. These results support a promising large-scale application of the designed medium for high biomass yields of the starter culture at minor costs.
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Affiliation(s)
- Nadia Galante
- Laboratorio de Microbiología de Alimentos, Instituto de Investigaciones en Procesos Tecnológicos Avanzados (INIPTA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Chaco Austral (UNCAus), Comandante Fernández 755, (3700), Sáenz Peña, Chaco, Argentina
| | - Noelia Palavecino Prpich
- Laboratorio de Microbiología de Alimentos, Instituto de Investigaciones en Procesos Tecnológicos Avanzados (INIPTA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Chaco Austral (UNCAus), Comandante Fernández 755, (3700), Sáenz Peña, Chaco, Argentina.
| | - Carmen Campos
- Departamento de Industrias, Instituto de Tecnología de Alimentos y Procesos Químicos (ITAPROQ), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Int. Güiraldes s/n, (1428), Ciudad Autónoma de Buenos Aires, Argentina
| | - María Elisa Cayré
- Laboratorio de Microbiología de Alimentos, Instituto de Investigaciones en Procesos Tecnológicos Avanzados (INIPTA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Chaco Austral (UNCAus), Comandante Fernández 755, (3700), Sáenz Peña, Chaco, Argentina
| | - Marcela Castro
- Laboratorio de Microbiología de Alimentos, Instituto de Investigaciones en Procesos Tecnológicos Avanzados (INIPTA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Chaco Austral (UNCAus), Comandante Fernández 755, (3700), Sáenz Peña, Chaco, Argentina
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Škaljac S, Jokanović M, Tomović V, Kartalović B, Ikonić P, Ćućević N, Vranešević J, Ivić M, Šojić B, Peulić T. Influence of traditional smoking on the content of polycyclic aromatic hydrocarbons in dry fermented beef sausage from Serbia. Food Control 2023. [DOI: 10.1016/j.foodcont.2023.109766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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Palavecino Prpich N, Sanabria E, Gliemmo MF, Cayré ME, Castro MP. Yacon juice as culture and cryoprotectant medium for Latilactobacillus sakei and Staphylococcus vitulinus autochthonous strains. BRAZILIAN JOURNAL OF FOOD TECHNOLOGY 2023. [DOI: 10.1590/1981-6723.11922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Abstract Yacon is mainly constituted of water and carbohydrates [single sugars and fructooligosaccharides (FOS)], thus being an excellent alternative for the growth and preservation of bacterial culture. Latilactobacillus sakei ACU-2 and Staphylococcus vitulinus ACU-10 comprised the autochthonous starter culture SAS-1 designed for the manufacture of dry sausages. This study evaluated the use of yacon juice as a potential growth medium and cryoprotectant for these bacteria. The growth medium was prepared with yacon juice supplemented with peptone and dipotassium phosphate. After growing, cells were resuspended in yacon juice (5, 10 and 25 mL/100 mL) and lyophilized. Viable cells were count before, immediately after lyophilization, and along 6 months of refrigerated storage. Both bacteria grew in every yacon concentration tested; however, juice concentration affected their growth. Latilactobacillus sakei grew at μ = 0.256 ± 0.01 giving the highest bacterial density at 10 mL/100 mL (Log DOmax 0.33 ± 0.01). While 5 mL/100 mL yacon juice provided the best conditions for S. vitulinus growth (μ = 0.215 ± 0.016; Log DOmax 0.32 ± 0.01). After lyophilization, the survival rate was 91.1% for L. sakei and 65.8% for S. vitulinus. Throughout storage, high cell counts suggested good stability of both bacteria. Results revealed that yacon juice comprises a nutritive substrate for the growth and cryopreservation of tested strains from the genus Latilactobacillus and Staphylococcus.
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Affiliation(s)
- Noelia Palavecino Prpich
- Universidad Nacional del Chaco Austral, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina
| | | | - María Fernanda Gliemmo
- Universidad de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina
| | - María Elisa Cayré
- Universidad Nacional del Chaco Austral, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina
| | - Marcela Paola Castro
- Universidad Nacional del Chaco Austral, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina
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Martín I, Alía A, Rodríguez A, Gómez F, Córdoba JJ. Growth and Expression of Virulence Genes of Listeria monocytogenes during the Processing of Dry-Cured Fermented "Salchichón" Manufactured with a Selected Lactilactobacillus sakei. BIOLOGY 2021; 10:1258. [PMID: 34943173 PMCID: PMC8698599 DOI: 10.3390/biology10121258] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 11/11/2021] [Accepted: 11/30/2021] [Indexed: 01/13/2023]
Abstract
The effect of the dry-cured fermented processing of "salchichón" inoculated with a selected strain of Lactilactobacillus sakei (205) on the growth and transcriptional response of three virulence genes (plcA, hly, and iap) of Listeria monocytogenes was evaluated. For this, three different batches of "salchichón" were analyzed: batch B (inoculated only with L. sakei), batch L (inoculated only with L. monocytogenes), and batch L + B (inoculated with both microorganisms). Sausages were ripened for 90 days according to a traditional industrial process. The processing of "salchichón" provoked a reduction in L. monocytogenes counts of around 2 log CFU/g. The downregulation of the expression of the three genes was found at the end of ripening when the water activity (aw) of "salchichón" was <0.85 aw. The combined effect on the reduction in L. monocytogenes counts together with the downregulation in the expression of the virulence genes throughout the "salchichón" processing could be of great interest to control the hazard caused by the presence of this pathogenic bacterium.
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Affiliation(s)
| | | | - Alicia Rodríguez
- Food Hygiene and Safety, Meat and Meat Products Research Institute, Faculty of Veterinary Science, University of Extremadura, Avda. de las Ciencias, s/n, 10003 Cáceres, Spain; (I.M.); (A.A.); (F.G.); (J.J.C.)
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Palavecino Prpich NZ, Camprubí GE, Cayré ME, Castro MP. Indigenous Microbiota to Leverage Traditional Dry Sausage Production. INTERNATIONAL JOURNAL OF FOOD SCIENCE 2021; 2021:6696856. [PMID: 33604370 PMCID: PMC7868150 DOI: 10.1155/2021/6696856] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 01/19/2021] [Indexed: 12/24/2022]
Abstract
The main issue addressed in this review is the need for innovation in the artisanal production of dry fermented sausages-leveraging rather than discarding tradition, together with some practical strategies available to achieve it. Throughout the text, emphasis is placed on the autochthonous microbiota responsible for the identity and unique sensory characteristics of these products. The available strategies to introduce innovation in this manufacturing process rely on metabolic flexibility of microbial strains. In this sense, this review evaluates the application of several tools aimed at improving the quality and safety of artisanal dry fermented sausages focusing on the microbial community role. The most studied alternatives to enhance dry sausage production comprise the use of autochthonous starter cultures-including functional and/or probiotic strains, the production of bacteriocins, and the generation of bioactive peptides, which have been thoroughly covered herein. The purpose of this work is to review recent research about novel different strategies available for food technologists to improve safety and quality in the manufacture of dry fermented sausages. Additional support strategies-quality product registers and innovation through tradition-have been suggested as complementary actions towards a successful introduction of indigenous microbial communities into traditional dry sausage production.
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Affiliation(s)
- Noelia Zulema Palavecino Prpich
- Laboratorio de Microbiología de Alimentos, Universidad Nacional del Chaco Austral (UNCAus), Comandante Fernández 755, Presidencia Roque Sáenz Peña, 3700 Chaco, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), C1425FQB Buenos Aires, Argentina
| | - Germán Edgardo Camprubí
- Facultad de Ingeniería, Universidad Nacional del Nordeste (UNNE), Las Heras 727, Resistencia, 3500 Chaco, Argentina
| | - María Elisa Cayré
- Laboratorio de Microbiología de Alimentos, Universidad Nacional del Chaco Austral (UNCAus), Comandante Fernández 755, Presidencia Roque Sáenz Peña, 3700 Chaco, Argentina
| | - Marcela Paola Castro
- Laboratorio de Microbiología de Alimentos, Universidad Nacional del Chaco Austral (UNCAus), Comandante Fernández 755, Presidencia Roque Sáenz Peña, 3700 Chaco, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), C1425FQB Buenos Aires, Argentina
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Škaljac S, Jokanović M, Tomović V, Šojić B, Ikonić P, Peulić T, Ivić M, Vranešević J, Kartalović B. Color Characteristics and Content of Polycyclic Aromatic Hydrocarbons of Traditional Dry Fermented Sausages Throughout Processing in Controlled Conditions. Polycycl Aromat Compd 2020. [DOI: 10.1080/10406638.2020.1853183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Snežana Škaljac
- Faculty of Technology Novi Sad, University of Novi Sad, Bulevar cara Lazara 1, Novi Sad, Serbia
| | - Marija Jokanović
- Faculty of Technology Novi Sad, University of Novi Sad, Bulevar cara Lazara 1, Novi Sad, Serbia
| | - Vladimir Tomović
- Faculty of Technology Novi Sad, University of Novi Sad, Bulevar cara Lazara 1, Novi Sad, Serbia
| | - Branislav Šojić
- Faculty of Technology Novi Sad, University of Novi Sad, Bulevar cara Lazara 1, Novi Sad, Serbia
| | - Predrag Ikonić
- Institute of Food Technology in Novi Sad, University of Novi Sad, Bulevar cara Lazara 1, Novi Sad, Serbia
| | - Tatjana Peulić
- Institute of Food Technology in Novi Sad, University of Novi Sad, Bulevar cara Lazara 1, Novi Sad, Serbia
| | - Maja Ivić
- Faculty of Technology Novi Sad, University of Novi Sad, Bulevar cara Lazara 1, Novi Sad, Serbia
| | - Jelena Vranešević
- Scientific Veterinary Institute "Novi Sad", Rumenački put 20, Novi Sad, Serbia
| | - Brankica Kartalović
- Scientific Veterinary Institute "Novi Sad", Rumenački put 20, Novi Sad, Serbia
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Technological properties of autochthonous Lactobacillus plantarum strains isolated from sucuk (Turkish dry-fermented sausage). Braz J Microbiol 2020; 51:1279-1287. [PMID: 32338340 DOI: 10.1007/s42770-020-00262-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Accepted: 03/11/2020] [Indexed: 10/24/2022] Open
Abstract
PURPOSE Five Lactobacillus strains isolated from sucuk (Turkish dry-fermented sausage) were studied for their genetic and technological properties. METHODS For genotypic identification, strains 16S rRNA gene sequences were used. To determine the antimicrobial activity of strains, seven foodborne pathogens were tested. Strains technological properties were characterized. RESULTS These strains were identified as Lactobacillus plantarum by 16S rRNA gene sequence analysis and the phylogenetic tree obtained by neighbor-joining method allowed grouping of these strains into three subgroups. L. plantarum strains showed antagonistic activities against Staphylococcus aureus, Listeria monocytogenes, Bacillus cereus, and Micrococcus luteus strains. PCR assay, using specific primers, showed the presence of bacteriocin (plantaricin) encoding genes in all L. plantarum strains tested. Antimicrobial metabolite production of these strains started at log phase and reached the maximum level at the end of the stationary phase. Regarding their technological properties, better growth was observed at 25 °C compared with 15 °C and 45 °C. The isolates which grown well within the pH scale pH 4.5-6.5 range additionally showed a decent growth at 6.5% salt concentration. It has been found that strains do not exhibit lipolytic and proteolytic activities nor have lysine, ornithine, and arginine decarboxylase activity. On the other hand, one strain showed weak nitrate reductase activity, and four strains produced acetoin from glucose. In addition, all strains were DL-lactic acid producers. Consequently, L. plantarum strains isolated exhibited some biochemical properties required for a starter culture in sucuk and similar products. CONCLUSIONS All identified strains may be a protective culture in the production of fermented meat products. In particular, L. plantarum S51 was distinguished from other isolates due to the inability to form acetoin from glucose. Further work will be needed to characterize L. plantarum strains as starter culture.
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Väkeväinen K, Hernández J, Simontaival AI, Severiano-Pérez P, Díaz-Ruiz G, von Wright A, Wacher-Rodarte C, Plumed-Ferrer C. Effect of different starter cultures on the sensory properties and microbiological quality of Atole agrio, a fermented maize product. Food Control 2020. [DOI: 10.1016/j.foodcont.2019.106907] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Stavropoulou DA, De Maere H, Berardo A, Janssens B, Filippou P, De Vuyst L, De Smet S, Leroy F. Species Pervasiveness Within the Group of Coagulase-Negative Staphylococci Associated With Meat Fermentation Is Modulated by pH. Front Microbiol 2018; 9:2232. [PMID: 30283431 PMCID: PMC6156374 DOI: 10.3389/fmicb.2018.02232] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 08/31/2018] [Indexed: 11/13/2022] Open
Abstract
During spontaneous meat fermentations, Staphylococcus equorum, Staphylococcus saprophyticus, and Staphylococcus xylosus are generally the most prevailing species within the communities of coagulase-negative staphylococci (CNS). There is an interest to introduce CNS isolates from artisan-style spontaneous meat fermentations as starter cultures in more industrialized processes, as to confer additional quality benefits. However, staphylococcal competitiveness within the meat matrix is affected by the processing conditions, which vary considerably among product types. A major factor of variability relates to the intensity of acidification, driven by the concentration of added carbohydrates. The effect of pH on CNS prevalence was studied in both a mince-based meat fermentation model and in fermented sausages produced on pilot scale. Roughly, from all experiments combined, it appeared that a pH of 5.3 corresponded with a breakpoint for CNS selection. Above this value, a general prevalence by S. xylosus was found, even overruling the addition of starter cultures consisting of S. equorum and S. saprophyticus strains. At pH values below 5.3, S. xylosus was also accompanied by S. equorum (following a mild pH drop) and S. saprophyticus (following a stronger pH drop). Still, addition of starter cultures affected the volatile profile compared to the control batch, even if those starter cultures were not able to dominate during the ripening process. This study nonetheless provides a warning for an overly confident use of specific CNS species as starter cultures, especially when in a given processing context the prevailing conditions do not allow superior growth compared to the CNS from the background microbiota.
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Affiliation(s)
- Despoina Angeliki Stavropoulou
- Research Group of Industrial Microbiology and Food Biotechnology, Faculty of Sciences and Bioengineering Sciences, Vrije Universiteit Brussel, Brussels, Belgium
| | - Hannelore De Maere
- Research Group for Technology and Quality of Animal Products, KU Leuven, Technology Campus Ghent, Ghent, Belgium
| | - Alberto Berardo
- Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Production, Ghent University, Ghent, Belgium
| | - Bente Janssens
- Research Group of Industrial Microbiology and Food Biotechnology, Faculty of Sciences and Bioengineering Sciences, Vrije Universiteit Brussel, Brussels, Belgium
| | - Panagiota Filippou
- Research Group of Industrial Microbiology and Food Biotechnology, Faculty of Sciences and Bioengineering Sciences, Vrije Universiteit Brussel, Brussels, Belgium
| | - Luc De Vuyst
- Research Group of Industrial Microbiology and Food Biotechnology, Faculty of Sciences and Bioengineering Sciences, Vrije Universiteit Brussel, Brussels, Belgium
| | - Stefaan De Smet
- Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Production, Ghent University, Ghent, Belgium
| | - Frédéric Leroy
- Research Group of Industrial Microbiology and Food Biotechnology, Faculty of Sciences and Bioengineering Sciences, Vrije Universiteit Brussel, Brussels, Belgium
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Quality properties and formation of α-dicarbonyl compounds in abalone muscle (Haliotis discus) as affected by tenderization and baking processes. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2018. [DOI: 10.1007/s11694-018-9765-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Stavropoulou DA, Van Reckem E, De Smet S, De Vuyst L, Leroy F. The narrowing down of inoculated communities of coagulase-negative staphylococci in fermented meat models is modulated by temperature and pH. Int J Food Microbiol 2018; 274:52-59. [PMID: 29551445 DOI: 10.1016/j.ijfoodmicro.2018.03.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 02/27/2018] [Accepted: 03/11/2018] [Indexed: 11/12/2022]
Abstract
Coagulase-negative staphylococci (CNS) are involved in colour and flavour formation of fermented meats. Their communities are established either spontaneously, as in some artisan-type products, or using a starter culture. The latter usually consists of Staphylococcus carnosus and/or Staphylococcus xylosus strains, although strains from other CNS species also have potential for application. However, it is not entirely clear how the fitness of alternative starter cultures within a fermented meat matrix compares to conventional ones and how this may be affected by processing conditions. Therefore, the aim of this study was to assess the influence of two key processing conditions, namely temperature and acidity, on the competitiveness of a cocktail of five different strains of CNS belonging to species that are potentially important for meat fermentation (Staphylococcus xylosus 2S7-2, S. carnosus 833, Staphylococcus epidermidis ATCC 12228, Staphylococcus equorum DFL-S19, and Staphylococcus saprophyticus FPS1). To this end, fermented meat models consisting of cured meat batters with initial pH values of 5.3, 5.5, or 5.7 were inoculated with these strains, stuffed in containers, and incubated at 23, 30, or 37 °C. Both the pH level and the temperature influenced the composition of the CNS communities, giving a competitive advantage to the best adapted species. Staphylococcus xylosus preferred low temperature and mild acidity, whereas an elevated temperature selected for S. epidermidis and a low pH for S. carnosus. Under the conditions tested, S. saprophyticus and S. equorum were outcompeted by the three other CNS species. Hence, CNS communities in fermented meats are not only established based on the initial presence of specific species in the meat batter but also by their subsequent adaptation to the processing conditions during fermentation, potentially overruling the use of starter cultures.
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Affiliation(s)
- Despoina Angeliki Stavropoulou
- Research Group of Industrial Microbiology and Food Biotechnology (IMDO), Faculty of Sciences and Bioengineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
| | - Emiel Van Reckem
- Research Group of Industrial Microbiology and Food Biotechnology (IMDO), Faculty of Sciences and Bioengineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
| | - Stefaan De Smet
- Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Production, Ghent University, Ghent, Belgium
| | - Luc De Vuyst
- Research Group of Industrial Microbiology and Food Biotechnology (IMDO), Faculty of Sciences and Bioengineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
| | - Frédéric Leroy
- Research Group of Industrial Microbiology and Food Biotechnology (IMDO), Faculty of Sciences and Bioengineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium.
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