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Grizon A, Theil S, Callon C, Gerber P, Helinck S, Dugat-Bony E, Bonnarme P, Chassard C. Genetic and technological diversity of Streptococcus thermophilus isolated from the Saint-Nectaire PDO cheese-producing area. Front Microbiol 2023; 14:1245510. [PMID: 38487210 PMCID: PMC10939066 DOI: 10.3389/fmicb.2023.1245510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 10/03/2023] [Indexed: 03/17/2024] Open
Abstract
Streptococcus thermophilus is of major importance for cheese manufacturing to ensure rapid acidification; however, studies indicate that intensive use of commercial strains leads to the loss of typical characteristics of the products. To strengthen the link between the product and its geographical area and improve the sensory qualities of cheeses, cheese-producing protected designations of origin (PDO) are increasingly interested in the development of specific autochthonous starter cultures. The present study is therefore investigating the genetic and functional diversity of S. thermophilus strains isolated from a local cheese-producing PDO area. Putative S. thermophilus isolates were isolated and identified from milk collected in the Saint-Nectaire cheese-producing PDO area and from commercial starters. Whole genomes of isolates were sequenced, and a comparative analysis based on their pan-genome was carried out. Important functional properties were studied, including acidifying and proteolytic activities. Twenty-two isolates representative of the diversity of the geographical area and four commercial strains were selected for comparison. The resulting phylogenetic trees do not correspond to the geographical distribution of isolates. The clustering based on the pan-genome analysis indicates that isolates are divided into five distinct groups. A Kyoto Encyclopedia of Genes and Genomes (KEGG) functional annotation of the accessory genes indicates that the accessory gene contents of isolates are involved in different functional categories. High variability in acidifying activities and less diversity in proteolytic activities were also observed. These results indicate that high genetic and functional variabilities of the species S. thermophilus may arise from a small (1,800 km2) geographical area and may be exploited to meet demand for use as autochthonous starters.
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Affiliation(s)
- Anna Grizon
- UMR545 Fromage, INRAE, VetAgro Sup, Université Clermont Auvergne, Aurillac, France
| | - Sebastien Theil
- UMR545 Fromage, INRAE, VetAgro Sup, Université Clermont Auvergne, Aurillac, France
| | - Cecile Callon
- UMR545 Fromage, INRAE, VetAgro Sup, Université Clermont Auvergne, Aurillac, France
| | | | - Sandra Helinck
- Université Paris-Saclay, INRAE, AgroParisTech, UMR SayFood, Palaiseau, France
| | - Eric Dugat-Bony
- Université Paris-Saclay, INRAE, AgroParisTech, UMR SayFood, Palaiseau, France
| | - Pascal Bonnarme
- Université Paris-Saclay, INRAE, AgroParisTech, UMR SayFood, Palaiseau, France
| | - Christophe Chassard
- UMR545 Fromage, INRAE, VetAgro Sup, Université Clermont Auvergne, Aurillac, France
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Liu Q, Liu S, Ye Q, Hou X, Yang G, Lu J, Hai Y, Shen J, Fang Y. A Novel Streptococcus thermophilus FUA329 Isolated from Human Breast Milk Capable of Producing Urolithin A from Ellagic Acid. Foods 2022. [PMCID: PMC9601659 DOI: 10.3390/foods11203280] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Urolithin A, a metabolite of ellagic acid, has many beneficial biological activities for people. Strains capable of producing urolithin A from ellagic acid have the hope of becoming the next-generation probiotics. However, only a few species of these strains have been reported. In this study, FUA329, a strain capable of converting ellagic acid to urolithin A in vitro, was isolated from the breast milk of healthy Chinese women. The results of morphological observation, physiological and biochemical tests, and 16S rRNA gene sequence analysis confirmed that the strain FUA329 was Streptococcus thermophilus. In addition, the S. thermophilus FUA329 growth phase is consistent with the degradation of ellagic acid, and urolithin A was produced in the stationary phase, with a maximum concentration of 7.38 μM at 50 h. The corresponding conversion efficiency of urolithin A from ellagic acid was 82%. In summary, S. thermophilus FUA329, a novel urolithin A-producing bacterium, would be useful for the industrial production of urolithin A and may be developed as a next-generation probiotic.
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Affiliation(s)
- Qitong Liu
- Co-Innovation Center of Jiangsu Marine Bio-Industry Technology, Jiangsu Ocean University, Lianyungang 222005, China
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, Lianyungang 222005, China
- College of Food Science and Engineering, Jiangsu Ocean University, Lianyungang 222005, China
| | - Shu Liu
- Co-Innovation Center of Jiangsu Marine Bio-Industry Technology, Jiangsu Ocean University, Lianyungang 222005, China
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, Lianyungang 222005, China
- College of Food Science and Engineering, Jiangsu Ocean University, Lianyungang 222005, China
| | - Qinwen Ye
- Co-Innovation Center of Jiangsu Marine Bio-Industry Technology, Jiangsu Ocean University, Lianyungang 222005, China
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, Lianyungang 222005, China
- College of Food Science and Engineering, Jiangsu Ocean University, Lianyungang 222005, China
| | - Xiaoyue Hou
- Co-Innovation Center of Jiangsu Marine Bio-Industry Technology, Jiangsu Ocean University, Lianyungang 222005, China
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, Lianyungang 222005, China
- College of Food Science and Engineering, Jiangsu Ocean University, Lianyungang 222005, China
| | - Guang Yang
- Co-Innovation Center of Jiangsu Marine Bio-Industry Technology, Jiangsu Ocean University, Lianyungang 222005, China
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, Lianyungang 222005, China
| | - Jing Lu
- Co-Innovation Center of Jiangsu Marine Bio-Industry Technology, Jiangsu Ocean University, Lianyungang 222005, China
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, Lianyungang 222005, China
- College of Food Science and Engineering, Jiangsu Ocean University, Lianyungang 222005, China
| | - Yang Hai
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Juan Shen
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yaowei Fang
- Co-Innovation Center of Jiangsu Marine Bio-Industry Technology, Jiangsu Ocean University, Lianyungang 222005, China
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, Lianyungang 222005, China
- College of Food Science and Engineering, Jiangsu Ocean University, Lianyungang 222005, China
- Correspondence:
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Kamilari E, Tsaltas D, Stanton C, Ross RP. Metataxonomic Mapping of the Microbial Diversity of Irish and Eastern Mediterranean Cheeses. Foods 2022; 11:2483. [PMID: 36010485 PMCID: PMC9407514 DOI: 10.3390/foods11162483] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 07/29/2022] [Accepted: 08/03/2022] [Indexed: 11/17/2022] Open
Abstract
The distinct sensorial characteristics of local cheeses influence consumer preferences, and make an essential contribution to the local economy. Microbial diversity in cheese is among the fundamental contributors to sensorial and qualitative characteristics. However, knowledge regarding the existence of microbial patterns associated with regional production practices in ripened cheeses remains limited. The present research was conducted to test the hypothesis that the background metagenome of cheeses could be used as a marker of their origin. We compared Irish versus Eastern Mediterranean cheeses-namely Greek and Cypriot-using High Throughput Sequencing (HTS). The study identified a significantly distinct separation among cheeses originating from the three different countries, in terms of the total microbial community composition. The use of machine learning and biomarkers discovery algorithms defined key microbes that differentiate each geographic region. Finally, the development of interaction networks revealed that the key species developed mostly negative interactions with the other members of the communities, highlighting their dominance in the community. The findings of the present research demonstrate that metagenome could indeed be used as a biological marker of the origin of mature cheeses, and could provide further insight into the dynamics of microbial community composition in ripened cheeses.
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Affiliation(s)
- Eleni Kamilari
- APC Microbiome Ireland, University College Cork, T12 YT20 Cork, Ireland or
- School of Microbiology, University College Cork, T12 K8AF Cork, Ireland
| | - Dimitrios Tsaltas
- Department of Agricultural Sciences, Biotechnology and Food Science, Cyprus University of Technology, Lemesos 3036, Cyprus
| | - Catherine Stanton
- APC Microbiome Ireland, University College Cork, T12 YT20 Cork, Ireland or
- School of Microbiology, University College Cork, T12 K8AF Cork, Ireland
- Department of Biosciences, Teagasc Food Research Centre, Moorepark, Fermoy, Co., P61 C996 Cork, Ireland
| | - R. Paul Ross
- APC Microbiome Ireland, University College Cork, T12 YT20 Cork, Ireland or
- School of Microbiology, University College Cork, T12 K8AF Cork, Ireland
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Garofalo G, Busetta G, Maniaci G, Sardina MT, Portolano B, Badalamenti N, Maggio A, Bruno M, Gaglio R, Settanni L. Development of "Quadrello di Ovino", a Novel Fresh Ewe's Cheese. Foods 2021; 11:25. [PMID: 35010151 PMCID: PMC8750039 DOI: 10.3390/foods11010025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 12/20/2021] [Accepted: 12/21/2021] [Indexed: 11/16/2022] Open
Abstract
This work was performed to produce a new soft ewe's milk cheese, namely "Quadrello di ovino" (QdO) cheese, to enlarge ewe's dairy product portfolio of South Italy, barely limited to Pecorino cheese typology. Cheese making was performed applying the technology for "Crescenza" cheese typology with some modifications. In particular, pasteurized ewes' milk was inoculated with two commercial starter formulations (SF1 and SF2) of Streptococcus thermophilus to obtain two different productions (QdO-P1 and QdO-P2, respectively). Plate counts demonstrated the ability of both starter formulations to drive the fermentation process, since S. thermophilus counts reached 109 CFU/g in both productions. Generally, the two starter formulations did not affect the chemical composition of QdO cheeses that contained, on average, 64.08% dry matter of which approximately 54.99% were fats and 36.39% proteins. Among chemical parameters, significant differences were registered for secondary lipid oxidation state (significantly lower for QdO-P2), fatty acids and volatile organic compounds (VOCs). However, the differences registered among cheese VOCs from were not perceived by the panelists who recognized both cheese productions highly similar, although QdO-P2 cheeses were mostly appreciated by the judges. This study allowed to produce a novel fresh ovine cheese with specific chemical and sensorial characteristics well appreciated by consumers.
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Affiliation(s)
- Giuliana Garofalo
- Dipartimento Scienze Agrarie, Alimentari e Forestali, Università degli Studi di Palermo, Viale delle Scienze, Ed. 5, 90128 Palermo, Italy; (G.G.); (G.B.); (G.M.); (M.T.S.); (B.P.); (R.G.)
| | - Gabriele Busetta
- Dipartimento Scienze Agrarie, Alimentari e Forestali, Università degli Studi di Palermo, Viale delle Scienze, Ed. 5, 90128 Palermo, Italy; (G.G.); (G.B.); (G.M.); (M.T.S.); (B.P.); (R.G.)
| | - Giuseppe Maniaci
- Dipartimento Scienze Agrarie, Alimentari e Forestali, Università degli Studi di Palermo, Viale delle Scienze, Ed. 5, 90128 Palermo, Italy; (G.G.); (G.B.); (G.M.); (M.T.S.); (B.P.); (R.G.)
| | - Maria Teresa Sardina
- Dipartimento Scienze Agrarie, Alimentari e Forestali, Università degli Studi di Palermo, Viale delle Scienze, Ed. 5, 90128 Palermo, Italy; (G.G.); (G.B.); (G.M.); (M.T.S.); (B.P.); (R.G.)
| | - Baldassare Portolano
- Dipartimento Scienze Agrarie, Alimentari e Forestali, Università degli Studi di Palermo, Viale delle Scienze, Ed. 5, 90128 Palermo, Italy; (G.G.); (G.B.); (G.M.); (M.T.S.); (B.P.); (R.G.)
| | - Natale Badalamenti
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche, Università degli Studi di Palermo, Viale delle Scienze, Ed. 17, 90128 Palermo, Italy; (N.B.); (A.M.); (M.B.)
| | - Antonella Maggio
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche, Università degli Studi di Palermo, Viale delle Scienze, Ed. 17, 90128 Palermo, Italy; (N.B.); (A.M.); (M.B.)
| | - Maurizio Bruno
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche, Università degli Studi di Palermo, Viale delle Scienze, Ed. 17, 90128 Palermo, Italy; (N.B.); (A.M.); (M.B.)
| | - Raimondo Gaglio
- Dipartimento Scienze Agrarie, Alimentari e Forestali, Università degli Studi di Palermo, Viale delle Scienze, Ed. 5, 90128 Palermo, Italy; (G.G.); (G.B.); (G.M.); (M.T.S.); (B.P.); (R.G.)
| | - Luca Settanni
- Dipartimento Scienze Agrarie, Alimentari e Forestali, Università degli Studi di Palermo, Viale delle Scienze, Ed. 5, 90128 Palermo, Italy; (G.G.); (G.B.); (G.M.); (M.T.S.); (B.P.); (R.G.)
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Bacterial Succession through the Artisanal Process and Seasonal Effects Defining Bacterial Communities of Raw-Milk Adobera Cheese Revealed by High Throughput DNA Sequencing. Microorganisms 2020; 9:microorganisms9010024. [PMID: 33374626 PMCID: PMC7822463 DOI: 10.3390/microorganisms9010024] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 12/16/2020] [Accepted: 12/18/2020] [Indexed: 12/15/2022] Open
Abstract
The bacterial community of the artisanal Adobera cheese from Los Altos de Jalisco was described through high-throughput sequencing of 16S rRNA gene libraries. Samples were collected in two different seasons (dry and rainy) during four key steps of the manufacturing process (raw milk, fresh curd, matured curd, and cheese). Bacterial diversity was higher in early steps in comparison with the final elaboration stages. Firmicutes and Proteobacteria were the most abundant phyla, strongly represented by the Streptococcaceae, Enterobacteriaceae and Lactobacillaceae families, and core bacteria genera such as Streptococcus spp., Lactococcus spp., and Lactobacillus spp. Undesirable bacteria, including Pseudomonas spp. and Acinetobacter spp., were also detected in raw milk but almost undetectable at the end of the cheese manufacturing process, and seemed to be displaced by lactic-acid bacteria-related genera. Seasonal effects were observed on the community structure but did not define the core microbiota composition. Predictive metabolism was related to membrane transport, and amino-acid, lipid, and carbohydrate metabolism pathways. Our results contribute to deduce the role of bacteria involved in Adobera cheese manufacturing in terms of the metabolism involved, cheese microbial safety, and how undesirable bacterial populations could be regulated by process standardization as a potential tool to improve safety.
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