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Domingues Galli B, Trossolo E, Carafa I, Squara S, Caratti A, Filannino P, Cordero C, Gobbetti M, Di Cagno R. Effectiveness of modified atmosphere and vacuum packaging in preserving the volatilome of Stelvio PDO cheese over time. Food Chem 2024; 444:138544. [PMID: 38310777 DOI: 10.1016/j.foodchem.2024.138544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 01/16/2024] [Accepted: 01/21/2024] [Indexed: 02/06/2024]
Abstract
We aimed to assay the effectiveness of vacuum or modified atmosphere packaging in preserving the organoleptic characteristics of already ripened slices of Stelvio Protected Designation of Origin cheese during 3 months of storage. A multi-omics panel, including metagenomic and metabolomic analyses, was implemented together with physicochemical and sensory analyses. Among the 177 volatiles identified, 30 out of the 50 potent odorants were found to be prevalent, regardless of packaging. Isovaleric acid showed the highest relative intensity in all samples. Caproic and caprylic acids always increased during storage, while metabolites such as dodecane and 2,3-butanediol always decreased. Slow proteolysis occurred during storage, but did not differentiate cheese samples. The type of packaging differentiated the microbiota and volatile profile, with modified atmosphere packaging keeping the volatilome more stable. Out of the 50 potent odorants, 9 were relevant to sample discrimination, with 8-nonen-2-one, 2-nonanone, and caproic acid being more abundant in stored samples.
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Affiliation(s)
- Bruno Domingues Galli
- Libera Università di Bolzano, Faculty of Agriculture, Environmental and Food Sciences, Bolzano, BZ, Italy
| | - Elisabetta Trossolo
- Libera Università di Bolzano, Faculty of Agriculture, Environmental and Food Sciences, Bolzano, BZ, Italy
| | - Ilaria Carafa
- Libera Università di Bolzano, Faculty of Agriculture, Environmental and Food Sciences, Bolzano, BZ, Italy
| | - Simone Squara
- Università di Torino, Dipartimento di Scienza e Tecnologia del Farmaco, Turin, TO, Italy
| | - Andrea Caratti
- Università di Torino, Dipartimento di Scienza e Tecnologia del Farmaco, Turin, TO, Italy
| | - Pasquale Filannino
- University of Bari Aldo Moro, Department of Soil, Plant and Food Sciences, Bari, BA, Italy
| | - Chiara Cordero
- Università di Torino, Dipartimento di Scienza e Tecnologia del Farmaco, Turin, TO, Italy
| | - Marco Gobbetti
- Libera Università di Bolzano, Faculty of Agriculture, Environmental and Food Sciences, Bolzano, BZ, Italy
| | - Raffaella Di Cagno
- Libera Università di Bolzano, Faculty of Agriculture, Environmental and Food Sciences, Bolzano, BZ, Italy.
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2
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Dong Y, Ronholm J, Fliss I, Karboune S. Screening of Lactic Acid Bacteria Strains for Potential Sourdough and Bread Applications: Enzyme Expression and Exopolysaccharide Production. Probiotics Antimicrob Proteins 2024:10.1007/s12602-024-10270-y. [PMID: 38733464 DOI: 10.1007/s12602-024-10270-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/20/2024] [Indexed: 05/13/2024]
Abstract
Twenty-eight strains of lactic acid bacteria (LAB) were characterized for the ability to express enzymes of interest (including protease, xylanase, α-amylase, laccase, and glucose oxidase) as well as the ability to produce exopolysaccharide (EPS). The screening of enzyme capability for all LAB strains proceeded in a progressive 3-stage manner that helps to profile the efficiency of LAB strains in expressing chosen enzymes (Stage 1), highlights the strains with affinity for flour as the substrate (Stage 2), and discerns strains that can adapt well in a simulated starter environment (Stage 3). The theoretical ability of LAB to express these enzymes was also assessed using Basic Local Alignment Search Tool (BLAST) analysis to identify the underlying genes in the whole genome sequence. By consolidating both experimental data and information obtained from BLAST, three LAB strains were deemed optimal in expressing enzymes, namely, Lb. delbrueckii subsp. bulgaricus (RBL 52), Lb. rhamnosus (RBL 102), and Lb. plantarum (ATCC 10241). Meanwhile, EPS-producing capabilities were observed for 10 out of 28 LAB strains, among which, Lactococcus lactis subsp. diacetylactis (RBL 37) had the highest total EPS yield (274.15 mg polysaccharide/L culture) and produced 46.2% polysaccharide with a molecular mass of more than 100 kDa.
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Affiliation(s)
- YiNing Dong
- Department of Food Science and Agricultural Chemistry, Macdonald Campus, McGill University, Montreal, QC, Canada
| | - Jennifer Ronholm
- Department of Food Science and Agricultural Chemistry, Macdonald Campus, McGill University, Montreal, QC, Canada
| | - Ismail Fliss
- Department of Food Science, Faculty of Agriculture and Food Sciences, Laval University, Quebec City, QC, Canada
| | - Salwa Karboune
- Department of Food Science and Agricultural Chemistry, Macdonald Campus, McGill University, Montreal, QC, Canada.
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Vacca M, Celano G, Serale N, Costantino G, Calabrese FM, Calasso M, De Angelis M. Dynamic microbial and metabolic changes during Apulian Caciocavallo cheese-making and ripening produced according to a standardized protocol. J Dairy Sci 2024:S0022-0302(24)00750-1. [PMID: 38642657 DOI: 10.3168/jds.2023-24049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 03/12/2024] [Indexed: 04/22/2024]
Abstract
The cheese microbiota plays a critical role in influencing its sensory and physicochemical properties. In this study, traditional Apulian Caciocavallo cheese coming from 4 different dairies in the same area and produced following standardized procedures have been examined, as well as the different bulk milks and natural whey starter cultures used. Moreover, considering the cheese wheels as the blocks of Caciocavallo cheeses as whole, these were characterized at different layers (i.e., core, under-rind, and rind) of the block using a multi-omics approach. In addition to physical-chemical characterization, culturomics, quantitative PCR, metagenomics, and metabolomics analysis, have been carried out post-salting and throughout ripening time (2 mo) to investigate the major shifts in the succession of the microbiota and flavor development. Culture-dependent and 16S rRNA metataxonomics results clearly clustered samples based on the microbiota biodiversity related to the production dairy plant as the result of the use of different NWS or intrinsic conditions of each production site. At the beginning of the ripening, cheeses were dominated by the Lactobacillus and, in 2 dairies (Art and SdC), Streptococcus genera associated with the NWS. The analysis allowed us to show that, although the diversity of identified genera did not change significantly between the rind, under-rind and core fractions of the same samples, there was an evolution in the relative abundance and absolute quantification, modifying and differentiating profiles during ripening. The qPCR mainly differentiated the temporal adaptation of those species originating from bulk milks and those provided by NWSs. The primary starter detected in NWS and cheese reassured the high relative concentration of 1-butanol, 2-butanol, 2-heptanol, 2-butanone, acetoin, delta-dodecalactone, hexanoic acid ethyl ester, octanoic acid ethyl ester, and VFFA during ripening, while cheeses displaying low abundances of Streptococcus and Lactococcus (dairy Del) have a lower total concentration of acetoin compared with Art and SdC. However, the sub-dominant strains and NSLAB present in cheeses are responsible for the production of secondary metabolites belonging to the chemical classes of ketones, alcohols, and organic acids, reaffirming the importance and relevance of autochthonous strains of each dairy plant although considering a delimited production area.
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Affiliation(s)
- Mirco Vacca
- Dept. of Soil, Plant and Food Science (DiSSPA), University of Bari Aldo Moro, via G. Amendola 165/A, 70126, Bari, Italy
| | - Giuseppe Celano
- Dept. of Soil, Plant and Food Science (DiSSPA), University of Bari Aldo Moro, via G. Amendola 165/A, 70126, Bari, Italy.
| | - Nadia Serale
- Dept. of Soil, Plant and Food Science (DiSSPA), University of Bari Aldo Moro, via G. Amendola 165/A, 70126, Bari, Italy
| | - Giuseppe Costantino
- Dept. of Soil, Plant and Food Science (DiSSPA), University of Bari Aldo Moro, via G. Amendola 165/A, 70126, Bari, Italy
| | - Francesco Maria Calabrese
- Dept. of Soil, Plant and Food Science (DiSSPA), University of Bari Aldo Moro, via G. Amendola 165/A, 70126, Bari, Italy
| | - Maria Calasso
- Dept. of Soil, Plant and Food Science (DiSSPA), University of Bari Aldo Moro, via G. Amendola 165/A, 70126, Bari, Italy.
| | - Maria De Angelis
- Dept. of Soil, Plant and Food Science (DiSSPA), University of Bari Aldo Moro, via G. Amendola 165/A, 70126, Bari, Italy
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Barreto Pinilla CM, da Silva Oliveira W, de Oliveira Garcia A, Spadoti LM, Redruello B, Del Rio B, Alvarez MA, Torres Silva E Alves A. Brazilian indigenous nonstarter lactic acid bacteria enhance the diversification of volatile compounds in short-aged cheese. Lett Appl Microbiol 2024; 77:ovae036. [PMID: 38573828 DOI: 10.1093/lambio/ovae036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 03/14/2024] [Accepted: 04/02/2024] [Indexed: 04/06/2024]
Abstract
There is growing interest in using autochthonous lactic acid bacteria (LAB) that provide unique sensory characteristics to dairy products without affecting their safety and quality. This work studied the capacity of three Brazilian indigenous nonstarter LABs (NSLAB) to produce biogenic amines (BAs) and evaluated their effect on the volatile organic compounds (VOCs), microbial LAB communities, and physicochemical profile of short-aged cheese. Initially, the strain's potential for biosynthesis of BAs was assessed by PCR and in vitro assays. Then, a pilot-scale cheese was produced, including the NSLAB, and the microbial and VOC profiles were analyzed after 25 and 45 days of ripening. As a results, the strains did not present genes related to relevant BAs and did not produce them in vitro. During cheese ripening, the Lactococci counts were reduced, probably in the production of alcohols and acid compounds by the NSLAB. Each strain produces a unique VOC profile that changes over the ripening time without the main VOCs related to rancid or old cheese. Particularly, the use of the strain Lacticaseibacillus. paracasei ItalPN16 resulted in production of ester compounds with fruity notes. Thus, indigenous NSLAB could be a valuable tool for the enhancement and diversification of flavor in short-aged cheese.
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Affiliation(s)
| | - Wellington da Silva Oliveira
- Reference Laboratory for Physical, Sensory and Statistics Analysis, Science and Food Quality Center, Food Technology Institute (ITAL), Avenida Brasil 2880, 13070-178 Campinas, SP, Brazil
| | - Aline de Oliveira Garcia
- Reference Laboratory for Physical, Sensory and Statistics Analysis, Science and Food Quality Center, Food Technology Institute (ITAL), Avenida Brasil 2880, 13070-178 Campinas, SP, Brazil
| | - Leila Maria Spadoti
- Dairy Technology Center (TECNOLAT) of the Food Technology Institute (ITAL), SP 13070-178, Campinas, São Paulo , Brazil
| | - Begoña Redruello
- Molecular Microbiology Group, Dairy Research Institute (IPLA, CSIC), Paseo Río Linares, s/n, 33300 Villaviciosa, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Av. del Hospital Universitario, s/n, 33011, Oviedo, Spain
| | - Beatriz Del Rio
- Molecular Microbiology Group, Dairy Research Institute (IPLA, CSIC), Paseo Río Linares, s/n, 33300 Villaviciosa, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Av. del Hospital Universitario, s/n, 33011, Oviedo, Spain
| | - Miguel Angel Alvarez
- Molecular Microbiology Group, Dairy Research Institute (IPLA, CSIC), Paseo Río Linares, s/n, 33300 Villaviciosa, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Av. del Hospital Universitario, s/n, 33011, Oviedo, Spain
| | - Adriana Torres Silva E Alves
- Dairy Technology Center (TECNOLAT) of the Food Technology Institute (ITAL), SP 13070-178, Campinas, São Paulo , Brazil
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Nataraj BH, Jeevan K, Dang AK, Nagpal R, Ali SA, Behare PV. Pre-clinical safety and toxicity assessment of Limosilactobacillus fermentum NCDC 400 in murine model. Microb Pathog 2024; 189:106589. [PMID: 38382627 DOI: 10.1016/j.micpath.2024.106589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 02/01/2024] [Accepted: 02/16/2024] [Indexed: 02/23/2024]
Abstract
Comprehensive safety assessment of potential probiotic strains is crucial in the selection of risk-free strains for clinical translation. This study aimed to evaluate the biosafety of Limosilactobacillus fermentum NCDC 400, a potential probiotic strain, using oral toxicity tests in a Swiss albino mouse model. Mice were orally gavaged with low (108 CFU/mouse/day) and high (1010 CFU/mouse/day) doses of NCDC 400 for 14 (acute), 28 (subacute), and 90 (subchronic) days to assess behavioral, hematological, biochemical, immunological, and histological effects. The administration of NCDC 400 did not result in any observable adverse effects on general health parameters, including body weight, feed and water intake, and organ indices. Hematological and biochemical parameters, such as glucose, serum enzymes, urea, creatinine, serum minerals, total serum proteins, and lipid profile, remained largely unaffected by the test strain. Notably, NCDC 400 administration led to a significant reduction in harmful intestinal enzymes and improvement in gut health indices, as indicated by fecal pH, lactate, ammonia, and short-chain fatty acids. There were no instances of bacterial translocation of NCDC 400 to blood or extra-intestinal organs. Immune homeostasis was not adversely affected by repeated exposure to NCDC 400 in all three oral toxicity studies. Histopathological examination revealed no strain-related changes in various tissues. Based on these findings, a dose of 1010 CFU/mouse/day was considered as the No Observable Effect Level (NOEL) in healthy mice. In conclusion, this study demonstrates the safe and non-toxic behavior of L. fermentum NCDC 400. The results support and ensure the safety and suitability for clinical trials and eventual translation into clinical practice as potential probiotic.
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Affiliation(s)
- Basavaprabhu Haranahalli Nataraj
- Techno-functional Starter Lab, National Collection of Dairy Cultures (NCDC), Dairy Microbiology Division, ICAR-National Dairy Research Institute, Karnal, 132001, Haryana, India; Dairy Chemistry and Bacteriology Section, Southern Regional Station (SRS), ICAR-National Dairy Research Institute, Adugodi, Bengaluru, 560030, Karnataka, India.
| | - K Jeevan
- Regional Ayurveda Research Institute, Central Council for Research in Ayurvedic Sciences, Aamkho, Gwalior, 474009, Madhya Pradesh, India.
| | - Ajay Kumar Dang
- Animal Physiology Division, ICAR-NDRI, Karnal, 132001, Haryana, India.
| | - Ravinder Nagpal
- Department of Nutrition and Integrative Physiology, Florida State University, Tallahassee, FL, 32306, USA
| | - Syed Azmal Ali
- Proteomics of Stem Cells and Cancer, German Cancer Research Center (DKFZ), Heidelberg, 69121, Germany.
| | - Pradip V Behare
- Techno-functional Starter Lab, National Collection of Dairy Cultures (NCDC), Dairy Microbiology Division, ICAR-National Dairy Research Institute, Karnal, 132001, Haryana, India.
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Zanzan M, Ezzaky Y, Achemchem F, Hamadi F, Valero A, Mamouni R. Fermentative optimization and characterization of exopolysaccharides from Enterococcus faecium F58 isolated from traditional fresh goat cheese. Food Sci Biotechnol 2024; 33:1195-1205. [PMID: 38440680 PMCID: PMC10909037 DOI: 10.1007/s10068-023-01424-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 08/06/2023] [Accepted: 08/23/2023] [Indexed: 03/06/2024] Open
Abstract
This study focused on optimizing the fermentation-based production of Exopolysaccharides (EPS) from Enterococcus faecium F58 initially isolated from traditional Moroccan Jben, a fresh goat cheese. Using the central composite design, yeast extract, MnSO4, and time affect EPS concentration. The highest experimental and predicted EPS production yields were 2.46 g/L ± 0.38 and 2.86 g/L, respectively. Optimal concentrations of yeast extract (4.46 g/L) and MnSO4 (0.011 g/L) were identified after 26 h at 30 °C. Characterization of EPS was conducted using SEM with EDX, XRD, and FTIR analyses. These tests revealed a specific morphology and an amorphous structure. Additionally, thermogravimetric analysis indicated adequate EPS stability up to 200 °C with anti-adhesion properties against different pathogens. This study offers valuable insights into the optimized production of EPS from Enterococcus faecium F58, which exhibits significant structural and functional properties for various applications in the food and biotechnology industries. Supplementary Information The online version contains supplementary material available at 10.1007/s10068-023-01424-9.
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Affiliation(s)
- Mariem Zanzan
- LASIME Research Laboratory, Bioprocess and Environment Team, Agadir Superior School of Technology, Ibn Zohr University, BP 33/S, 80150 Agadir, Morocco
- Laboratory of Microbial Biotechnology and Vegetal Protection, Faculty of Sciences, University Ibn Zohr, BP 32/S, 80000 Agadir, Morocco
| | - Youssef Ezzaky
- LASIME Research Laboratory, Bioprocess and Environment Team, Agadir Superior School of Technology, Ibn Zohr University, BP 33/S, 80150 Agadir, Morocco
| | - Fouad Achemchem
- LASIME Research Laboratory, Bioprocess and Environment Team, Agadir Superior School of Technology, Ibn Zohr University, BP 33/S, 80150 Agadir, Morocco
| | - Fatima Hamadi
- Laboratory of Microbial Biotechnology and Vegetal Protection, Faculty of Sciences, University Ibn Zohr, BP 32/S, 80000 Agadir, Morocco
| | - Antonio Valero
- Department of Food Science and Technology, UIC Zoonosis y Enfermedades Emergentes (ENZOEM), CeiA3, Universidad de Córdoba, Campus Rabanales, 14014 Córdoba, Spain
| | - Rachid Mamouni
- Biotechnology, Materials & Environment Team, Faculty of Sciences, University Ibn Zohr, BP 32/S, 80000 Agadir, Morocco
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Tsouggou N, Slavko A, Tsipidou O, Georgoulis A, Dimov SG, Yin J, Vorgias CE, Kapolos J, Papadelli M, Papadimitriou K. Investigation of the Microbiome of Industrial PDO Sfela Cheese and Its Artisanal Variants Using 16S rDNA Amplicon Sequencing and Shotgun Metagenomics. Foods 2024; 13:1023. [PMID: 38611328 PMCID: PMC11011710 DOI: 10.3390/foods13071023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 03/17/2024] [Accepted: 03/21/2024] [Indexed: 04/14/2024] Open
Abstract
Sfela is a white brined Greek cheese of protected designation of origin (PDO) produced in the Peloponnese region from ovine, caprine milk, or a mixture of the two. Despite the PDO status of Sfela, very few studies have addressed its properties, including its microbiology. For this reason, we decided to investigate the microbiome of two PDO industrial Sfela cheese samples along with two non-PDO variants, namely Sfela touloumotiri and Xerosfeli. Matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF MS), 16S rDNA amplicon sequencing and shotgun metagenomics analysis were used to identify the microbiome of these traditional cheeses. Cultured-based analysis showed that the most frequent species that could be isolated from Sfela cheese were Enterococcus faecium, Lactiplantibacillus plantarum, Levilactobacillus brevis, Pediococcus pentosaceus and Streptococcus thermophilus. Shotgun analysis suggested that in industrial Sfela 1, Str. thermophilus dominated, while industrial Sfela 2 contained high levels of Lactococcus lactis. The two artisanal samples, Sfela touloumotiri and Xerosfeli, were dominated by Tetragenococcus halophilus and Str. thermophilus, respectively. Debaryomyces hansenii was the only yeast species with abundance > 1% present exclusively in the Sfela touloumotiri sample. Identifying additional yeast species in the shotgun data was challenging, possibly due to their low abundance. Sfela cheese appears to contain a rather complex microbial ecosystem and thus needs to be further studied and understood. This might be crucial for improving and standardizing both its production and safety measures.
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Affiliation(s)
- Natalia Tsouggou
- Department of Food Science and Technology, University of the Peloponnese, 24100 Kalamata, Greece; (N.T.); (A.S.); (J.K.); (M.P.)
| | - Aleksandra Slavko
- Department of Food Science and Technology, University of the Peloponnese, 24100 Kalamata, Greece; (N.T.); (A.S.); (J.K.); (M.P.)
| | - Olympia Tsipidou
- Laboratory of Food Quality Control and Hygiene, Department of Food Science and Human Nutrition, 18855 Athens, Greece;
| | - Anastasios Georgoulis
- Department of Biochemistry and Molecular Biology, National and Kapodistrian University of Athens, Panepistimioupolis-Zographou, 15784 Athens, Greece; (A.G.); (C.E.V.)
| | - Svetoslav G. Dimov
- Faculty of Biology, Sofia University “St. Kliment Ohridski”, 8, Dragan Tzankov Blvd., 1164 Sofia, Bulgaria;
| | - Jia Yin
- Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, College of Life Sciences, Hunan Normal University, Changsha 410081, China;
- Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, College of Life Science, Hunan Normal University, Changsha 410081, China
| | - Constantinos E. Vorgias
- Department of Biochemistry and Molecular Biology, National and Kapodistrian University of Athens, Panepistimioupolis-Zographou, 15784 Athens, Greece; (A.G.); (C.E.V.)
| | - John Kapolos
- Department of Food Science and Technology, University of the Peloponnese, 24100 Kalamata, Greece; (N.T.); (A.S.); (J.K.); (M.P.)
| | - Marina Papadelli
- Department of Food Science and Technology, University of the Peloponnese, 24100 Kalamata, Greece; (N.T.); (A.S.); (J.K.); (M.P.)
| | - Konstantinos Papadimitriou
- Laboratory of Food Quality Control and Hygiene, Department of Food Science and Human Nutrition, 18855 Athens, Greece;
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Yang S, Peng Z, Hardie WJ, Huang T, Tang H, Liu Z, Liu Q, Xiao M, Xiong T, Xie M. Screening of probiotic Lactobacillus to reduce peanut allergy and with potential anti-allergic activity. J Sci Food Agric 2024; 104:2006-2014. [PMID: 37909354 DOI: 10.1002/jsfa.13089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 10/19/2023] [Accepted: 11/01/2023] [Indexed: 11/03/2023]
Abstract
BACKGROUND Peanut is a significant source of nutrition and a valuable oilseed crop. It is also a serious allergy source, which poses a threat to 1.1% of the population. This study aimed to screen lactic acid bacteria (LAB) with the capacity to alleviate peanut allergenicity and exhibit anti-allergic properties. RESULT The results show that LAB can make use of substances in peanuts to reduce the pH of peanut milk from 6.603 to 3.593-4.500 by acid production and that it can utilize the protein in peanuts to reduce the allergenic content (especially Ara h 1) and improve biological activity in peanut pulp. The content of Ara h 1 peanut-sensitizing protein was reduced by 74.65% after fermentation. The protein extracted from fermented peanut pulp is more readily digestible by gastrointestinal juices. The inhibitory activity assay of hyaluronidase (an enzyme with strong correlation to allergy) increased from 46.65% to a maximum of 90.57% to reveal that LAB fermentation of peanut pulp exhibited a robust anti-allergic response. CONCLUSION The strains identified in this study exhibited the ability to mitigate peanut allergenicity partially and to possess potential anti-allergic properties. Lactobacillus plantarum P1 and Lactobacillus salivarius C24 were identified as the most promising strains and were selected for further research. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Shiyu Yang
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang, China
- School of Food Science and Technology, Nanchang University, Nanchang, China
| | - Zhen Peng
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang, China
- School of Food Science and Technology, Nanchang University, Nanchang, China
| | | | - Tao Huang
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang, China
- School of Food Science and Technology, Nanchang University, Nanchang, China
- International Institute of Food Innovation, Nanchang University, Nanchang, China
| | - Hui Tang
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang, China
- School of Food Science and Technology, Nanchang University, Nanchang, China
| | - Zhuo Liu
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang, China
- School of Food Science and Technology, Nanchang University, Nanchang, China
| | - Qiaozhen Liu
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang, China
- School of Food Science and Technology, Nanchang University, Nanchang, China
| | - Muyan Xiao
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang, China
- School of Food Science and Technology, Nanchang University, Nanchang, China
- International Institute of Food Innovation, Nanchang University, Nanchang, China
| | - Tao Xiong
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang, China
- School of Food Science and Technology, Nanchang University, Nanchang, China
| | - Mingyong Xie
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang, China
- School of Food Science and Technology, Nanchang University, Nanchang, China
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9
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Valenzuela JA, Vázquez L, Rodríguez J, Flórez AB, Vasek OM, Mayo B. Phenotypic, Technological, Safety, and Genomic Profiles of Gamma-Aminobutyric Acid-Producing Lactococcus lactis and Streptococcus thermophilus Strains Isolated from Cow's Milk. Int J Mol Sci 2024; 25:2328. [PMID: 38397005 PMCID: PMC10889254 DOI: 10.3390/ijms25042328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 02/09/2024] [Accepted: 02/14/2024] [Indexed: 02/25/2024] Open
Abstract
Gamma-aminobutyric acid (GABA)-producing lactic acid bacteria (LAB) can be used as starters in the development of GABA-enriched functional fermented foods. In this work, four GABA-producing strains each of Lactococcus lactis and Streptococcus thermophilus species were isolated from cow's milk, and their phenotypic, technological, and safety profiles determined. Genome analysis provided genetic support for the majority of the analyzed traits, namely, GABA production, growth in milk, and the absence of genes of concern. The operon harboring the glutamate decarboxylase gene (gadB) was chromosomally encoded in all strains and showed the same gene content and gene order as those reported, respectively, for L. lactis and S. thermophilus. In the latter species, the operon was flanked (as in most strains of this species) by complete or truncated copies of insertion sequences (IS), suggesting recent acquisition through horizontal gene transfer. The genomes of three L. lactis and two S. thermophilus strains showed a gene encoding a caseinolytic proteinase (PrtP in L. lactis and PrtS in S. thermophilus). Of these, all but one grew in milk, forming a coagulum of good appearance and an appealing acidic flavor and taste. They also produced GABA in milk supplemented with monosodium glutamate. Two L. lactis strains were identified as belonging to the biovar. diacetylactis, utilized citrate from milk, and produced significant amounts of acetoin. None of the strains showed any noticeable antibiotic resistance, nor did their genomes harbor transferable antibiotic resistance genes or genes involved in toxicity, virulence, or pathogenicity. Altogether these results suggest that all eight strains may be considered candidates for use as starters or components of mixed LAB cultures for the manufacture of GABA-enriched fermented dairy products.
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Affiliation(s)
- José Alejandro Valenzuela
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias (IPLA), Consejo Superior de Investigaciones Científicas (CSIC), Paseo Río Linares s/n, 33300 Villaviciosa, Spain; (J.A.V.); (L.V.); (J.R.); (A.B.F.)
- Biotecnología Microbiana para la Innovación Alimentaria, Instituto de Modelado e Innovación Tecnológica-Universidad Nacional del Nordeste (CONICET-UNNE), Campus UNNE, Corrientes 3400, Argentina;
| | - Lucía Vázquez
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias (IPLA), Consejo Superior de Investigaciones Científicas (CSIC), Paseo Río Linares s/n, 33300 Villaviciosa, Spain; (J.A.V.); (L.V.); (J.R.); (A.B.F.)
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Avenida de Roma s/n, 33011 Oviedo, Spain
| | - Javier Rodríguez
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias (IPLA), Consejo Superior de Investigaciones Científicas (CSIC), Paseo Río Linares s/n, 33300 Villaviciosa, Spain; (J.A.V.); (L.V.); (J.R.); (A.B.F.)
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Avenida de Roma s/n, 33011 Oviedo, Spain
| | - Ana Belén Flórez
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias (IPLA), Consejo Superior de Investigaciones Científicas (CSIC), Paseo Río Linares s/n, 33300 Villaviciosa, Spain; (J.A.V.); (L.V.); (J.R.); (A.B.F.)
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Avenida de Roma s/n, 33011 Oviedo, Spain
| | - Olga M. Vasek
- Biotecnología Microbiana para la Innovación Alimentaria, Instituto de Modelado e Innovación Tecnológica-Universidad Nacional del Nordeste (CONICET-UNNE), Campus UNNE, Corrientes 3400, Argentina;
| | - Baltasar Mayo
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias (IPLA), Consejo Superior de Investigaciones Científicas (CSIC), Paseo Río Linares s/n, 33300 Villaviciosa, Spain; (J.A.V.); (L.V.); (J.R.); (A.B.F.)
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Avenida de Roma s/n, 33011 Oviedo, Spain
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Paul S, Hossain TJ, Ali F, Hossain ME, Chowdhury T, Faisal IK, Ferdouse J. Assessment of the in-vitro probiotic efficacy and safety of Pediococcus pentosaceus L1 and Streptococcus thermophilus L3 isolated from Laban, a popular fermented milk product. Arch Microbiol 2024; 206:82. [PMID: 38294545 DOI: 10.1007/s00203-023-03812-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 12/21/2023] [Indexed: 02/01/2024]
Abstract
Probiotics are beneficial microorganisms, mostly lactic acid bacteria (LAB), that offer health benefits to the host when consumed in adequate amounts. This study assessed the probiotic efficacy and safety of LAB strains isolated from Laban, a traditional fermented milk product. Seven primarily selected Gram-positive, catalase-negative, non-spore-forming isolates were examined for their antimicrobial activity against the bacterial pathogens Bacillus cereus, Salmonella typhi, Staphylococcus aureus, and Vibrio cholera, and the fungal pathogen Candida albicans. Two isolates, identified as Pediococcus pentosaceus L1 and Streptococcus thermophilus L3, which showed antimicrobial activity against all pathogens, were further evaluated for their probiotic competence. The selected isolates demonstrated strong resistance to low pH, bile salts, and phenol, indicating their potential for gastric endurance. They also exhibited high cell surface hydrophobicity to various hydrocarbons, autoaggregation, and coaggregation properties, demonstrating strong adhesion abilities. In addition, both isolates showed strong antioxidant activity and were non-hemolytic. Although the isolates had some resistance to certain antibiotics, they were generally susceptible to commonly used antibiotics. The two LAB strains also exhibited promising technological properties, such as milk coagulation and exopolysaccharide production, indicating their potential to enhance the quality of dairy products. The results suggest that the LAB strains isolated from Laban have strong potential as probiotics, and due to their food origin, they are highly likely to exhibit maximal efficacy in food and pharmaceutical products for human consumption.
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Affiliation(s)
- Shanta Paul
- Department of Microbiology, University of Chittagong, Chattogram, 4331, Bangladesh
| | - Tanim Jabid Hossain
- Department of Biochemistry and Molecular Biology, University of Chittagong, Chattogram, 4331, Bangladesh.
- Biochemistry and Pathogenesis of Microbes - BPM Research Group, Chattogram, 4331, Bangladesh.
| | - Ferdausi Ali
- Department of Microbiology, University of Chittagong, Chattogram, 4331, Bangladesh
| | - Md Elias Hossain
- Department of Microbiology, University of Chittagong, Chattogram, 4331, Bangladesh
| | - Tasneem Chowdhury
- Department of Microbiology, University of Chittagong, Chattogram, 4331, Bangladesh
| | - Ibrahim Khalil Faisal
- Department of Biochemistry and Molecular Biology, University of Chittagong, Chattogram, 4331, Bangladesh
- Biochemistry and Pathogenesis of Microbes - BPM Research Group, Chattogram, 4331, Bangladesh
| | - Jannatul Ferdouse
- Department of Microbiology, University of Chittagong, Chattogram, 4331, Bangladesh.
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11
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Altin C, Kabwanga TI, Kiran F, Ozturkoglu-Budak S. Evaluation of autochthonous Lactococcus lactis subsp. lactis strain as a candidate starter culture in white-brined cheese. Food Sci Biotechnol 2024; 33:115-127. [PMID: 38186618 PMCID: PMC10766922 DOI: 10.1007/s10068-023-01332-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 04/19/2023] [Accepted: 05/03/2023] [Indexed: 01/09/2024] Open
Abstract
Lactococcus lactis subsp. lactis NCCB100539 isolated from an artisanal raw ewe's milk cheese was evaluated as a potential starter culture in white-brined cheese. As a safety criteria, the cytotoxicity of the viable and heat-killed cells and CFE of this strain were determined on Caco-2 cell line by MTT assay. The antibiotic sensitivity of the strain to nine different antibiotics was also investigated. Cheeses produced using this strain were compared with control cheese in terms of physicochemical, microbiological, sensory properties as well as the peptide and volatile profiles during the 90-days of ripening period. Experimental cheeses had more extensive proteolysis as well as higher sensory scores. Incorporated L. lactis also led to an improvement in the microbial cheese quality. Neither living nor the dead cells and CFE of the strain showed cytotoxicity on Caco-2 cells. Therefore, L. lactis NCCB100539 strain could be a good starter candidate for the industrial white-brined cheeses. Graphical abstract Supplementary Information The online version contains supplementary material available at 10.1007/s10068-023-01332-y.
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Affiliation(s)
- Cansu Altin
- Department of Dairy Technology, Faculty of Agriculture, Ankara University, Ankara, Turkey
| | | | - Fadime Kiran
- Pharmabiotic Technologies Research Laboratory, Department of Biology, Faculty of Science, Ankara University, Ankara, Turkey
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12
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Tondhoush A, Soltani M, Azarikia F, Homayouni‐Rad A, Karami M. Fabrication of UF-white cheese: Obtaining a different proteolysis rate, texture, and flavor via using combinations of mesophilic starter culture and Lactobacillus helveticus. Food Sci Nutr 2024; 12:328-339. [PMID: 38268878 PMCID: PMC10804073 DOI: 10.1002/fsn3.3769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 09/30/2023] [Accepted: 10/06/2023] [Indexed: 01/26/2024] Open
Abstract
The effect of using mesophilic starter culture (Lactococcus lactis ssp. lactis and Lactococcus lactis ssp. cremoris) and Lactobacillus helveticus (L. helveticus) at different ratios (100:0, 75:25, 50:50, 25:75, and 0:100) on the quality properties of UF-white cheese during 90 days of ripening was studied. The results revealed that an increase in L. helveticus ratio caused a significant decrease in the pH and total protein contents of the cheeses (p < .05). No significant changes were observed in the dry matter content of the cheeses (p > .05). The use of higher ratios of L. helveticus led to a noticeable increase in proteolysis and lipolysis indices in the cheeses (p < .05). The cheese produced with higher ratios of L. helveticus had less storage (G') and loss (G″) moduli compared to other cheeses. The more open structure was seen in the cheeses produced using higher ratios of L. helveticus. Regarding sensory properties, lower scores of body and texture, and higher scores of odor and flavor were assigned to the cheeses produced using higher ratios of L. helveticus. In conclusion, the use of combinations of mesophilic starter culture and L. helveticus at specific ratios (75:25 and 25:75) led to improve quality characteristics of UF-white cheese.
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Affiliation(s)
- Arash Tondhoush
- Department of Food Sciences and Technology, Faculty of Pharmacy, Tehran Medical SciencesIslamic Azad UniversityTehranIran
| | - Mostafa Soltani
- Department of Food Sciences and Technology, Faculty of Pharmacy, Tehran Medical SciencesIslamic Azad UniversityTehranIran
- Nutrition and Food Sciences Research Center, Tehran Medical SciencesIslamic Azad UniversityTehranIran
| | - Fatemeh Azarikia
- Department of Food Technology, Faculty of Agricultural Technology (Aburaihan)University of TehranTehranIran
| | - Aziz Homayouni‐Rad
- Department of Food Science and Technology, Faculty of Nutrition & Food SciencesTabriz University of Medical SciencesTabrizIran
| | - Mostafa Karami
- Department of Food Science and Technology, College of Food IndustryBu‐Ali Sina UniversityHamedanIran
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13
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Sioziou E, Kakouri A, Bosnea L, Samelis J. Antilisterial activity of raw sheep milk from two native Epirus breeds: Culture-dependent identification, bacteriocin gene detection and primary safety evaluation of the antagonistic LAB biota. Curr Res Microb Sci 2023; 6:100209. [PMID: 38116185 PMCID: PMC10727937 DOI: 10.1016/j.crmicr.2023.100209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023] Open
Abstract
Raw milk from native small ruminant breeds in Epirus, Greece, is a valuable natural source of autochthonous lactic acid bacteria (LAB) strains with superior biotechnological properties. In this study, two bulk milks (RM1, RM2) from two local sheep yards, intended for traditional Kefalotyri cheese production, were preselected for bacteriocin-like antilisterial activity by in vitro tests. Their antagonistic LAB biota was quantified followed by polyphasic (16S rRNA gene sequencing; IGS for Enterococcus; a multiplex-PCR for Leuconostoc) identification of 42 LAB (RM1/18; RM2/24) isolates further evaluated for bacteriocin encoding genes and primary safety traits. Representative isolates of the numerically dominant mesophilic LAB were Leuconostoc mesenteroides (10) in both RMs, Streptococcus parauberis (7) in RM2, and Lactococcus lactis (1) in RM1; the subdominant thermophilic LAB isolates were Enterococcus durans (8), E. faecium (6), E. faecalis (3), E. hirae (1), E. hermanniensis (1), Streptococcus lutetiensis (2), S. equinus (1) and S. gallolyticus (1). Based on their rpoB, araA, dsr and sorA profiles, six Ln. mesenteroides strains (8 isolates) were atypical lying between the subspecies mesenteroides and dextranicum, whereas two strains profiled with Ln. mesenteroides subsp. jonggajibkimchi that is first-time reported in Greek dairy food. Two RM1 E. faecium strain biotypes (3 isolates) showed strong, enterocin-mediated antilisterial activity due to entA/entB/entP possession. One E. durans from RM1 possessed entA and entP, while additional nine RM2 isolates of the E. faecium/durans group processed entA or entP singly. All showed direct (cell-associated) antilisterial activity only, as also both S. lutetiensis strains from RM2 did strongly. Desirably, no LAB isolate was β-hemolyrtic, or cytolysin-positive, or possessed vanA, vanB for vancomycin resistance, or agg, espA, hyl, and IS16 virulence genes. However, all three E. faecalis from RM2 possessed gelE and/or ace virulence genes. In conclusion, all Ln. mesenteroides strains, the two safe, enterocin A-B-P-producing E. faecium strains, and the two antilisterial S. lutetiensis strains should be validated further as potential costarter or adjunct cultures in Kefalotyri cheese. The prevalence of α-hemolytic pyogenic streptococci in raw milk, mainly S. parauberis in RM2, requires consideration in respect to subclinical mastitis in sheep and the farm hygiene overall.
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Affiliation(s)
- Eleni Sioziou
- Department of Dairy Research, Institute of Technology of Agricultural Products, Hellenic Agricultural Organization – DIMITRA, Ethnikis Antistaseos 3, Katsikas, Ioannina 45221, Greece
| | - Athanasia Kakouri
- Department of Dairy Research, Institute of Technology of Agricultural Products, Hellenic Agricultural Organization – DIMITRA, Ethnikis Antistaseos 3, Katsikas, Ioannina 45221, Greece
| | - Loulouda Bosnea
- Department of Dairy Research, Institute of Technology of Agricultural Products, Hellenic Agricultural Organization – DIMITRA, Ethnikis Antistaseos 3, Katsikas, Ioannina 45221, Greece
| | - John Samelis
- Department of Dairy Research, Institute of Technology of Agricultural Products, Hellenic Agricultural Organization – DIMITRA, Ethnikis Antistaseos 3, Katsikas, Ioannina 45221, Greece
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14
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Das A, Behera RN, Kapoor A, Ambatipudi K. The Potential of Meta-Proteomics and Artificial Intelligence to Establish the Next Generation of Probiotics for Personalized Healthcare. J Agric Food Chem 2023; 71:17528-17542. [PMID: 37955263 DOI: 10.1021/acs.jafc.3c03834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
The symbiosis of probiotic bacteria with humans has rendered various health benefits while providing nutrition and a suitable environment for their survival. However, the probiotics must survive unfavorable gut conditions to exert beneficial effects. The intrinsic resistance of probiotics to survive harsh conditions results from a myriad of proteins. Interaction of microbial proteins with the host is indispensable for modulating the gut microbiome, such as interaction with cell receptors and protective action against pathogens. The complex interplay of proteins should be unraveled by utilizing metaproteomic strategies. The contribution of probiotics to health is now widely accepted. However, due to the inconsistency of generalized probiotics, contemporary research toward precision probiotics has gained momentum for customized treatment. This review explores the application of metaproteomics and AI/ML algorithms in resolving multiomics data analysis and in silico prediction of microbial features for screening specific beneficial probiotic organisms. Implementing these integrative strategies could augment the potential of precision probiotics for personalized healthcare.
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Affiliation(s)
- Arpita Das
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Rama N Behera
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Ayushi Kapoor
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Kiran Ambatipudi
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
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15
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Silva BN, Fernandes N, Carvalho L, Faria AS, Teixeira JA, Rodrigues C, Gonzales-Barron U, Cadavez V. Lactic acid bacteria from artisanal raw goat milk cheeses: technological properties and antimicrobial potential. Ital J Food Saf 2023; 12:11559. [PMID: 38116370 PMCID: PMC10726393 DOI: 10.4081/ijfs.2023.11559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Accepted: 09/11/2023] [Indexed: 12/21/2023] Open
Abstract
In cheese-making, a starter culture composed of adequately chosen lactic acid bacteria (LAB) may be suitable to ensure the rapid acidification of milk, improve textural and sensory characteristics, and avoid pathogen proliferation. In this work, 232 LAB isolates collected from artisanal goat's raw milk cheeses produced in Portugal were evaluated for their antimicrobial capacity (at 10 and 37°C), as well as their acidifying and proteolytic properties. Among the 232 isolates, at least 98% of those isolated in De Man- Rogosa-Sharpe (MRS) agar presented antagonism against Listeria monocytogenes, Salmonella Typhimurium, or Staphylococcus aureus, whereas less than 28.1% of M17-isolated LAB showed antagonism against these pathogens. M17-isolated LAB displayed better results than MRS ones in terms of acidifying capacity. As for the proteolytic assay, only 2 MRS isolates showed casein hydrolysis capacity. Principal component analyses and molecular characterization of a subset of selected isolates were conducted to identify those with promising capacities and to correlate the identified LAB genera and species with their antimicrobial, acidifying, and/or proteolytic properties. Lactococcus strains were associated with the highest acidifying capacity, whereas Leuconostoc and Lacticaseibacillus strains were more related to antimicrobial capacities. Leuconostoc mesenteroides, Lactococcus lactis, and Lacticaseibacillus paracasei were the predominant organisms found. The results of this work highlight various strains with pathogen inhibition capacity and suitable technological properties to be included in a customized starter culture. In future work, it is necessary to appropriately define the starter culture and implement it in the cheese-making process to evaluate if the in-vitro capacities are observable in a real food system.
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Affiliation(s)
| | - Nathália Fernandes
- Mountain Research Center, Campus of Santa Apolónia, Polytechnic Institute of Bragança
- Laboratory for Sustainability and Technology in Mountain Regions, Campus of Santa Apolónia, Polytechnic Institute of Bragança
| | - Laís Carvalho
- Mountain Research Center, Campus of Santa Apolónia, Polytechnic Institute of Bragança
- Laboratory for Sustainability and Technology in Mountain Regions, Campus of Santa Apolónia, Polytechnic Institute of Bragança
| | - Ana Sofia Faria
- Mountain Research Center, Campus of Santa Apolónia, Polytechnic Institute of Bragança
- Laboratory for Sustainability and Technology in Mountain Regions, Campus of Santa Apolónia, Polytechnic Institute of Bragança
| | - José António Teixeira
- Center of Biological Engineering, University of Minho, Braga
- Labbels - Associate Laboratory, Braga, Guimarães, Portugal
| | - Carina Rodrigues
- Mountain Research Center, Campus of Santa Apolónia, Polytechnic Institute of Bragança
- Laboratory for Sustainability and Technology in Mountain Regions, Campus of Santa Apolónia, Polytechnic Institute of Bragança
| | - Ursula Gonzales-Barron
- Mountain Research Center, Campus of Santa Apolónia, Polytechnic Institute of Bragança
- Laboratory for Sustainability and Technology in Mountain Regions, Campus of Santa Apolónia, Polytechnic Institute of Bragança
| | - Vasco Cadavez
- Mountain Research Center, Campus of Santa Apolónia, Polytechnic Institute of Bragança
- Laboratory for Sustainability and Technology in Mountain Regions, Campus of Santa Apolónia, Polytechnic Institute of Bragança
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Silva LF, Sunakozawa TN, Monteiro DA, Casella T, Conti AC, Todorov SD, Barretto Penna AL. Potential of Cheese-Associated Lactic Acid Bacteria to Metabolize Citrate and Produce Organic Acids and Acetoin. Metabolites 2023; 13:1134. [PMID: 37999230 PMCID: PMC10673126 DOI: 10.3390/metabo13111134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 10/29/2023] [Accepted: 11/01/2023] [Indexed: 11/25/2023] Open
Abstract
Lactic acid bacteria (LAB) are pivotal in shaping the technological, sensory, and safety aspects of dairy products. The evaluation of proteolytic activity, citrate utilization, milk pH reduction, and the production of organic compounds, acetoin, and diacetyl by cheese associated LAB strains was carried out, followed by Principal Component Analysis (PCA). Citrate utilization was observed in all Leuconostoc (Le.) mesenteroides, Le. citreum, Lactococcus (Lc.) lactis, Lc. garvieae, and Limosilactobacillus (Lm.) fermentum strains, and in some Lacticaseibacillus (Lact.) casei strains. Most strains exhibited proteolytic activity, reduced pH, and generated organic compounds. Multivariate PCA revealed Le. mesenteroides as a prolific producer of acetic, lactic, formic, and pyruvic acids and acetoin at 30 °C. Enterococcus sp. was distinguished from Lact. casei based on acetic, formic, and pyruvic acid production, while Lact. casei primarily produced lactic acid at 37 °C. At 42 °C, Lactobacillus (L.) helveticus and some L. delbrueckii subsp. bulgaricus strains excelled in acetoin production, whereas L. delbrueckii subsp. bulgaricus and Streptococcus (S.) thermophilus strains primarily produced lactic acid. Lm. fermentum stood out with its production of acetic, formic, and pyruvic acids. Overall, cheese-associated LAB strains exhibited diverse metabolic capabilities which contribute to desirable aroma, flavor, and safety of dairy products.
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Affiliation(s)
- Luana Faria Silva
- Institute of Biosciences, Humanities and Exact Sciences, Food Engineering and Technology Department, UNESP—São Paulo State University, São José do Rio Preto 15054-000, SP, Brazil; (L.F.S.); (T.N.S.); (D.A.M.); (A.C.C.)
| | - Tássila Nakata Sunakozawa
- Institute of Biosciences, Humanities and Exact Sciences, Food Engineering and Technology Department, UNESP—São Paulo State University, São José do Rio Preto 15054-000, SP, Brazil; (L.F.S.); (T.N.S.); (D.A.M.); (A.C.C.)
| | - Diego Alves Monteiro
- Institute of Biosciences, Humanities and Exact Sciences, Food Engineering and Technology Department, UNESP—São Paulo State University, São José do Rio Preto 15054-000, SP, Brazil; (L.F.S.); (T.N.S.); (D.A.M.); (A.C.C.)
| | - Tiago Casella
- Department of Dermatological, Infectious and Parasitic Diseases, FAMERP—São José do Rio Preto Medical School, São José do Rio Preto 15090-000, SP, Brazil;
| | - Ana Carolina Conti
- Institute of Biosciences, Humanities and Exact Sciences, Food Engineering and Technology Department, UNESP—São Paulo State University, São José do Rio Preto 15054-000, SP, Brazil; (L.F.S.); (T.N.S.); (D.A.M.); (A.C.C.)
| | - Svetoslav Dimitrov Todorov
- ProBacLab, Department of Food Science and Experimental Nutrition, Faculty of Pharmaceutical Sciences, USP—São Paulo University, São Paulo 05508-000, SP, Brazil;
- CISAS—Center for Research and Development in Agrifood Systems and Sustainability, Escola Superior de Tecnologia e Gestão, Instituto Politécnico de Viana do Castelo, 4900-347 Viana do Castelo, Portugal
| | - Ana Lúcia Barretto Penna
- Institute of Biosciences, Humanities and Exact Sciences, Food Engineering and Technology Department, UNESP—São Paulo State University, São José do Rio Preto 15054-000, SP, Brazil; (L.F.S.); (T.N.S.); (D.A.M.); (A.C.C.)
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Roldán-Pérez S, Gómez Rodríguez SL, Sepúlveda-Valencia JU, Ruiz Villadiego OS, Márquez Fernández ME, Montoya Campuzano OI, Durango-Zuleta MM. Assessment of probiotic properties of lactic acid bacteria isolated from an artisanal Colombian cheese. Heliyon 2023; 9:e21558. [PMID: 38027952 PMCID: PMC10658276 DOI: 10.1016/j.heliyon.2023.e21558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 10/18/2023] [Accepted: 10/24/2023] [Indexed: 12/01/2023] Open
Abstract
Lactic Acid Bacteria play an important role in the milk fermentation processes of traditional cheeses and have become an important target for the development of novel cheese cultures because of their ability to confer health benefits. This study aimed to evaluate the probiotic potential of 12 Lactic Acid Bacteria (LAB) strains previously isolated and molecularly identified from an artisanal Colombian Double-Cream Cheese. Probiotic properties, including safety (hemolysis and sensibility to antibiotics), pH and bile salt tolerance, auto-aggregation, cell surface hydrophobicity, antibacterial activity, and exopolysaccharide production, were examined. None of the strains were hemolytic, and Pediococcus (16, 18) and Lactobacillus (28, 29) were found to be sensitive to all antibiotics. Moreover, all the strains tolerated pH (3.0, 6.5 and 8.0) and bile salt conditions (0.3, 0.6 and 1.0 % w/v). Pediococcus pentosaceus (16), Leuconostoc citreum (17), Pediococcus acidilactici (18), Enterococcus faecium (21,22), Enterococcus faecalis (24) and Limosilactobacillus fermentum (29) exhibited medium autoaggregation and affinity to chloroform. Six of the strains exhibited a ropy exopolysaccharide phenotype. Antibacterial activity against foodborne pathogens, Salmonella Typhimurium ATCC 14028, Listeria monocytogenes ATCC 19111, Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC 25923, was found to be strain dependent, with the strains 16, 18, 21, 26, 28 and 29 presenting a higher inhibition (>4 mm) against all of them. According to Principal Component Analysis, P. pentosaceus (16), Leu. mesenteroides (26), L. casei (28), L. fermentum (29), and E. faecium (21) showed strong probiotic properties. Our findings suggest that five strains out of the 12 sampled strains are potential probiotics that could be used in the processing of traditional dairy products on an industrial scale to improve their quality.
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Affiliation(s)
- Samantha Roldán-Pérez
- Universidad Nacional de Colombia sede Medellín, Faculty of Agricultural Sciences, Medellín, Colombia
| | | | | | | | | | - Olga I. Montoya Campuzano
- Universidad Nacional de Colombia sede Medellín, Faculty of Agricultural Sciences, Medellín, Colombia
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Salamandane A, Cahango G, Muetanene BA, Malfeito-Ferreira M, Brito L. Multidrug Resistance in Enterococci Isolated from Cheese and Capable of Producing Benzalkonium Chloride-Resistant Biofilms. Biology (Basel) 2023; 12:1353. [PMID: 37887063 PMCID: PMC10604254 DOI: 10.3390/biology12101353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 10/16/2023] [Accepted: 10/20/2023] [Indexed: 10/28/2023]
Abstract
This study aimed to investigate enterococci recovered from eight Portuguese cheeses made with raw ewe's milk, regarding antibiotic resistance, virulence genes, minimum inhibitory concentration (MIC) of benzalkonium chloride (BAC), biofilm formation capacity, and biofilm eradication (MBEC) by BAC. Antimicrobial resistance against seven antibiotics of five groups was evaluated using the disk diffusion method. The presence of the genes that encode resistance to the antibiotics penicillin (blaZ), erythromycin (ermA, ermB, and ermC), vancomycin (vanA and vanB), aminoglycoside (aac(6')-Ie-aph(2″)-Ia), and β-lactam (pbp5) and the genes that encode virulence factors, frsB, cylA, gelE, esp, and agg, were investigated via multiplex PCR. The susceptibility of planktonic cells to BAC was evaluated by the MIC and MBC values of the isolates, using the broth microdilution method. To assess the biofilm-forming ability and resistance of biofilms to BAC, biofilms were produced on stainless steel coupons, followed by exposure to BAC. The results showed a high resistance to the antibiotics vancomycin (87.5%), erythromycin (75%), tetracycline (50%), and penicillin (37.5%). Multidrug resistance was observed in 68.8% of the isolates. Genes encoding the virulence factors FrsB (frsB) and gelatinase E (gelE) were detected in all isolates. The esp and cylA genes were found in 56.3% and 37.5% of the isolates, respectively. All isolates exhibited a biofilm-forming ability, regardless of incubation time and temperature tested. However, after 72 h at 37 °C, E. faecium and E. faecalis biofilms showed significant differences (p ≤ 0.05). Although most isolates (62.5%) were susceptible to BAC (MIC ≤ 10 mg/L), biofilms of the same isolates were, generally, resistant to the higher concentration of BAC (80 mg/mL) tested. This study using Enterococcus isolates from a ready-to-eat food, such as cheese, reveals the high percentages of vancomycin resistance and multidrug resistance, associated with the presence of virulence genes, in isolates also capable of producing biofilms resistant to BAC, an important active ingredient of many disinfectants. These results emphasize the need for effective control measures to ensure the safety and quality of dairy products.
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Affiliation(s)
- Acácio Salamandane
- LEAF—Linking Landscape, Environment, Agriculture and Food Research Center, Associate Laboratory TERRA, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisbon, Portugal; (G.C.); (M.M.-F.); (L.B.)
- Faculdade de Ciências de Saúde, Universidade Lúrio, Campus Universitário de Marrere, Nampula 4250, Mozambique
| | - Gomes Cahango
- LEAF—Linking Landscape, Environment, Agriculture and Food Research Center, Associate Laboratory TERRA, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisbon, Portugal; (G.C.); (M.M.-F.); (L.B.)
- CNIC—Centro Nacional de Investigação Científica, Avenida Ho Chi Min, Luanda 201, Angola
| | - Belo Afonso Muetanene
- Faculdade de Ciências Agrárias, Universidade Lúrio, Campus Universitário de Unango, Sanga 3300, Mozambique;
| | - Manuel Malfeito-Ferreira
- LEAF—Linking Landscape, Environment, Agriculture and Food Research Center, Associate Laboratory TERRA, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisbon, Portugal; (G.C.); (M.M.-F.); (L.B.)
| | - Luísa Brito
- LEAF—Linking Landscape, Environment, Agriculture and Food Research Center, Associate Laboratory TERRA, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisbon, Portugal; (G.C.); (M.M.-F.); (L.B.)
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19
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D'Incecco P, Bettera L, Bancalari E, Rosi V, Sindaco M, Gobbi S, Candotti P, Nazzicari N, Limbo S, Gatti M, Pellegrino L. High-speed cold centrifugation of milk modifies the microbiota, the ripening process and the sensory characteristics of raw-milk hard cheeses. Food Res Int 2023; 172:113102. [PMID: 37689872 DOI: 10.1016/j.foodres.2023.113102] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 06/01/2023] [Accepted: 06/09/2023] [Indexed: 09/11/2023]
Abstract
The microbial population of raw milk plays a crucial role in the development of distinctive traits of raw-milk cheeses particularly appreciated by consumers. It was previously demonstrated that the microbial population of raw milk is modified by a high-speed centrifugation (also called bactofugation) conducted at 39 °C. The aim of the present study was to evaluate the effects of this process, performed once or twice, on the microbial, compositional, biochemical, and sensory characteristics of the derived hard cheeses. Experimental and control cheesemaking were conducted in parallel at a cheese factory during a 13-month period. Cheeses were analysed after 9, 15 and 20 months of ripening for microbial count, composition, proteolysis extent, volatile compounds, and sensory profile. Results evidenced that experimental cheeses were characterized by lower numbers of viable lactobacilli respect to control. Experimental cheeses also showed differences in the progress of primary and secondary proteolysis which, in turn, caused different patterns of free amino acids at all ripening times. Experimental cheeses had significantly lower content of esters and were differentiated from control for some traits by assessors. In conclusion, use of high-speed centrifugation of milk shall be discouraged if characteristic traits of raw-milk cheeses, particularly PDO cheeses, want to be retained.
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Affiliation(s)
- Paolo D'Incecco
- Department of Food, Environmental and Nutritional Sciences, University of Milan, 20133 Milan, Italy.
| | - Luca Bettera
- Department of Food and Drug, University of Parma, Parma 43124, Italy
| | - Elena Bancalari
- Department of Food and Drug, University of Parma, Parma 43124, Italy
| | - Veronica Rosi
- Department of Food, Environmental and Nutritional Sciences, University of Milan, 20133 Milan, Italy
| | - Marta Sindaco
- Department of Food, Environmental and Nutritional Sciences, University of Milan, 20133 Milan, Italy
| | - Serena Gobbi
- Department of Food, Environmental and Nutritional Sciences, University of Milan, 20133 Milan, Italy
| | - Paolo Candotti
- National Reference Centre for Animal Welfare, IZSLER, 25124 Brescia, Italy
| | - Nelson Nazzicari
- Council for Agricultural Research and Economics (CREA), Research Centre for Fodder Crops and Dairy Productions, 26900 Lodi, Italy
| | - Sara Limbo
- Department of Food, Environmental and Nutritional Sciences, University of Milan, 20133 Milan, Italy
| | - Monica Gatti
- Department of Food and Drug, University of Parma, Parma 43124, Italy
| | - Luisa Pellegrino
- Department of Food, Environmental and Nutritional Sciences, University of Milan, 20133 Milan, Italy
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20
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Silva BN, Teixeira JA, Cadavez V, Gonzales-Barron U. Mild Heat Treatment and Biopreservatives for Artisanal Raw Milk Cheeses: Reducing Microbial Spoilage and Extending Shelf-Life through Thermisation, Plant Extracts and Lactic Acid Bacteria. Foods 2023; 12:3206. [PMID: 37685139 PMCID: PMC10486694 DOI: 10.3390/foods12173206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 08/22/2023] [Accepted: 08/24/2023] [Indexed: 09/10/2023] Open
Abstract
The microbial quality of raw milk artisanal cheeses is not always guaranteed due to the possible presence of pathogens in raw milk that can survive during manufacture and maturation. In this work, an overview of the existing information concerning lactic acid bacteria and plant extracts as antimicrobial agents is provided, as well as thermisation as a strategy to avoid pasteurisation and its negative impact on the sensory characteristics of artisanal cheeses. The mechanisms of antimicrobial action, advantages, limitations and, when applicable, relevant commercial applications are discussed. Plant extracts and lactic acid bacteria appear to be effective approaches to reduce microbial contamination in artisanal raw milk cheeses as a result of their constituents (for example, phenolic compounds in plant extracts), production of antimicrobial substances (such as organic acids and bacteriocins, in the case of lactic acid bacteria), or other mechanisms and their combinations. Thermisation was also confirmed as an effective heat inactivation strategy, causing the impairment of cellular structures and functions. This review also provides insight into the potential constraints of each of the approaches, hence pointing towards the direction of future research.
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Affiliation(s)
- Beatriz Nunes Silva
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal; (V.C.); (U.G.-B.)
- Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
- CEB—Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal;
| | - José António Teixeira
- CEB—Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal;
- LABBELS—Associate Laboratory, 4710-057 Braga, Portugal
| | - Vasco Cadavez
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal; (V.C.); (U.G.-B.)
- Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
| | - Ursula Gonzales-Barron
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal; (V.C.); (U.G.-B.)
- Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
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21
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Egbune EO, Ezedom T, Orororo OC, Egbune OU, Avwioroko OJ, Aganbi E, Anigboro AA, Tonukari NJ. Solid-state fermentation of cassava (Manihot esculenta Crantz): a review. World J Microbiol Biotechnol 2023; 39:259. [PMID: 37493900 DOI: 10.1007/s11274-023-03706-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 07/18/2023] [Indexed: 07/27/2023]
Abstract
Solid-state fermentation (SSF) is a promising technology for producing value-added products from cassava (Manihot esculenta Crantz). In this process, microorganisms are grown on cassava biomass without the presence of free-flowing liquid. Compared to other processing methods, SSF has several advantages, such as lower costs, reduced water usage, and higher product yields. By enhancing the content of bioactive compounds like antioxidants and phenolic compounds, SSF can also improve the nutritional value of cassava-based products. Various products, including enzymes, organic acids, and biofuels, have been produced using SSF of cassava. Additionally, SSF can help minimize waste generated during cassava processing by utilizing cassava waste as a substrate, which can reduce environmental pollution. The process has also been explored for the production of feed and food products such as tempeh and cassava flour. However, optimizing the process conditions, selecting suitable microbial strains, and developing cost-effective production processes are essential for the successful commercialization of SSF of cassava.
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Affiliation(s)
- Egoamaka O Egbune
- Department of Biochemistry, Faculty of Science, Delta state University, P.M.B. 1, Abraka, Nigeria.
- Tonukari Biotechnology Laboratory, Sapele, Delta state, Nigeria.
| | - Theresa Ezedom
- Department of Medical Biochemistry, Faculty of Basic Medical Sciences, Delta State University, P.M.B. 1, Abraka, Nigeria
| | - Osuvwe C Orororo
- Department of Medical Biochemistry, Faculty of Basic Medical Sciences, Delta State University, P.M.B. 1, Abraka, Nigeria
| | - Olisemeke U Egbune
- Department of Human Physiology, Faculty of Basic Medical Sciences, University of Jos, Jos, Plateau State, Nigeria
| | - Oghenetega J Avwioroko
- Department of Biochemistry, Faculty of Basic Medical Sciences, Redeemer's University, Ede, Osun State, Nigeria
| | - Eferhire Aganbi
- Department of Biochemistry, Faculty of Science, Delta state University, P.M.B. 1, Abraka, Nigeria
- Georgia State University, J. Mack Robinson College of Business, 3348 Peachtree Rd NE, Atlanta, GA, 30326, USA
| | - Akpovwehwee A Anigboro
- Department of Biochemistry, Faculty of Science, Delta state University, P.M.B. 1, Abraka, Nigeria
| | - Nyerhovwo J Tonukari
- Department of Biochemistry, Faculty of Science, Delta state University, P.M.B. 1, Abraka, Nigeria
- Tonukari Biotechnology Laboratory, Sapele, Delta state, Nigeria
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22
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Thodis P, Kosma IS, Nesseris K, Badeka AV, Kontominas MG. Evaluation of a New Bulk Packaging Container for the Ripening of Feta Cheese. Foods 2023; 12:foods12112176. [PMID: 37297421 DOI: 10.3390/foods12112176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 06/12/2023] Open
Abstract
In the present study, the quality characteristics of Feta cheese were investigated as a function of the packaging container (a stainless-steel tank (SST), a wooden barrel (WB), and a tin can (TC)) and ripening time. The results showed that the Feta cheese's pH, moisture, and lactose decreased, while fat, protein, and salt increased (p < 0.05) during ripening with SST and WB, showing similar behaviors versus that of the TC container. For the proteolysis indices, % TN,% WSN, 12% TCA, and 5% PTA showed the highest values (p < 0.05) for cheeses packaged in WB, followed by those in SST and TC, with all increasing (p < 0.05) during ripening. The most abundant odor-active volatiles were free fatty acids, alcohols, and esters following the order SST > WB > TC on day 60. On day 60, the cheeses packaged in SST and WB showed higher (p < 0.05) hardness and fracturability values, as well as aroma scores, compared to those in TC, with both parameter values increasing with the ripening time.
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Affiliation(s)
- Panagiotis Thodis
- Laboratory of Food Chemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
| | - Ioanna S Kosma
- Laboratory of Food Chemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
| | - Konstantinos Nesseris
- DODONI S.A. Agricultural Dairy Industry of Epirus, 1 Tagmatarchi Kostaki, Eleousa, 45500 Ioannina, Greece
| | - Anastasia V Badeka
- Laboratory of Food Chemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
| | - Michael G Kontominas
- Laboratory of Food Chemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
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Silva SPM, Teixeira JA, Silva CCG. Prevention of Fungal Contamination in Semi-Hard Cheeses by Whey–Gelatin Film Incorporated with Levilactobacillus brevis SJC120. Foods 2023; 12:foods12071396. [PMID: 37048215 PMCID: PMC10093246 DOI: 10.3390/foods12071396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 03/16/2023] [Accepted: 03/22/2023] [Indexed: 03/29/2023] Open
Abstract
Cheese whey fermented by lactic acid bacteria (LAB) was used to develop an edible film with antifungal properties. Five LAB strains isolated from artisanal cheeses were screened for antifungal activity and incorporated into a whey–gelatin film. Of the strains tested, Levilactobacillus brevis SJC120 showed the strongest activity against five filamentous fungi isolated from cheese and cheese-making environment, at both 10 °C and 20 °C. The cell-free supernatant from L. brevis inhibited fungal growth by more than 80%. Incorporation of bacterial cells into the film did not alter the moisture content, water vapor permeability, or mechanical and optical properties. The whey–gelatin film was also able to maintain the viability of L. brevis cells at 107 log CFU/g after 30 days at 10 °C. In cheeses wrapped with L. brevis film, the size of fungal colonies decreased by 55% to 76%. Furthermore, no significant differences (p > 0.05) were observed in cheese proteolysis or in the moisture, fat, and protein content of the cheese wrapped with films. The results showed that whey–gelatin film with L. brevis SJC120 can reduce the contamination of cheese with filamentous fungi and could be used as an alternative to conventional cheese preservation and packaging.
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Affiliation(s)
- Sofia P. M. Silva
- Institute of Agricultural and Environmental Research and Technology (IITAA), University of the Azores, 9700-042 Angra do Heroísmo, Portugal
| | - José A. Teixeira
- Centre of Biological Engineering (CEB), University of Minho, Campus Gualtar, 4710-057 Braga, Portugal
- LABBELS-Associate Laboratory, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal
| | - Célia C. G. Silva
- Institute of Agricultural and Environmental Research and Technology (IITAA), University of the Azores, 9700-042 Angra do Heroísmo, Portugal
- Correspondence:
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24
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Zavistanaviciute P, Klementaviciute J, Klupsaite D, Zokaityte E, Ruzauskas M, Buckiuniene V, Viskelis P, Bartkiene E. Effects of Marinades Prepared from Food Industry By-Products on Quality and Biosafety Parameters of Lamb Meat. Foods 2023; 12:foods12071391. [PMID: 37048209 PMCID: PMC10093910 DOI: 10.3390/foods12071391] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/21/2023] [Accepted: 03/22/2023] [Indexed: 03/29/2023] Open
Abstract
This study aimed to develop marinade formulas based on by-products from the dairy, berry, and fruit industries and apply them to lamb meat (LM) treatments to improve the safety and quality characteristics of the meat. To fulfil this aim, six marinade (M) formulations were created based on acid whey (AW) fermented with Lacticaseibacillus casei (Lc) and Liquorilactobacillus uvarum (Lu), either alone or combined with freeze-dried apple (AP) or blackcurrant (BC) pomace. The most appropriate fermentation times for the marinades were selected according to the lower pH values and higher viable LAB counts in the samples. Additionally, the antimicrobial activity of the selected marinades against pathogenic and opportunistic bacterial strains was tested. The characteristics of the LM were analysed after 24 and 48 h of treatment, including physicochemical, technological, and microbiological parameters, as well as overall acceptability. It was established that, after 48 h of fermentation, all of the tested marinades, except M-AWLuBC, had lactic acid bacterial counts > 8.0 log10 CFU·mL−1 and pH values < 3.74. The broadest spectra of pathogen inhibition were observed in the M-AWLuAP and M-AWLuBC marinades. The latter formulations improved the water holding capacity (WHC) and overall acceptability of the LM, while, in the LM-AWLcAP samples, histamine, cadaverine, putrescine, tryptamine, and phenylethylamine were not formed. Lastly, LM treatment with the M-AWLcAP and M-AWLuAP formulas for 48 h achieved the highest overall acceptability (9.04 and 9.43), tenderness (1.53 and 1.47 kg·cm−2) and WHC (2.95% and 3.5%) compared to the control samples.
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Affiliation(s)
- Paulina Zavistanaviciute
- Institute of Animal Rearing Technologies, Faculty of Animal Sciences, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
- Department of Food Safety and Quality, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
- Correspondence: ; Tel.: +370-655-06461
| | - Jolita Klementaviciute
- Institute of Animal Rearing Technologies, Faculty of Animal Sciences, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Dovile Klupsaite
- Institute of Animal Rearing Technologies, Faculty of Animal Sciences, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Egle Zokaityte
- Institute of Animal Rearing Technologies, Faculty of Animal Sciences, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Modestas Ruzauskas
- Department of Anatomy and Physiology, Faculty of Veterinary, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
- Institute of Microbiology and Virology, Faculty of Veterinary, Lithuanian University of Health Sciences, Mickeviciaus Str. 9, LT-44307 Kaunas, Lithuania
| | - Vilija Buckiuniene
- Institute of Animal Rearing Technologies, Faculty of Animal Sciences, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Pranas Viskelis
- Lithuanian Research Centre for Agriculture and Forestry, Institute of Horticulture, Kauno Str. 30, LT-54333 Babtai, Lithuania
| | - Elena Bartkiene
- Institute of Animal Rearing Technologies, Faculty of Animal Sciences, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
- Department of Food Safety and Quality, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
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25
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Nicolescu CM, Bumbac M, Buruleanu CL, Popescu EC, Stanescu SG, Georgescu AA, Toma SM. Biopolymers Produced by Lactic Acid Bacteria: Characterization and Food Application. Polymers (Basel) 2023; 15:polym15061539. [PMID: 36987319 PMCID: PMC10058920 DOI: 10.3390/polym15061539] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 03/13/2023] [Accepted: 03/13/2023] [Indexed: 03/30/2023] Open
Abstract
Plants, animals, bacteria, and food waste are subjects of intensive research, as they are biological sources for the production of biopolymers. The topic links to global challenges related to the extended life cycle of products, and circular economy objectives. A severe and well-known threat to the environment, the non-biodegradability of plastics obliges different stakeholders to find legislative and technical solutions for producing valuable polymers which are biodegradable and also exhibit better characteristics for packaging products. Microorganisms are recognized nowadays as exciting sources for the production of biopolymers with applications in the food industry, package production, and several other fields. Ubiquitous organisms, lactic acid bacteria (LAB) are well studied for the production of exopolysaccharides (EPS), but much less as producers of polylactic acid (PLA) and polyhydroxyalkanoates (PHAs). Based on their good biodegradability feature, as well as the possibility to be obtained from cheap biomass, PLA and PHAs polymers currently receive increased attention from both research and industry. The present review aims to provide an overview of LAB strains' characteristics that render them candidates for the biosynthesis of EPS, PLA, and PHAs, respectively. Further, the biopolymers' features are described in correlation with their application in different food industry fields and for food packaging. Having in view that the production costs of the polymers constitute their major drawback, alternative solutions of biosynthesis in economic terms are discussed.
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Affiliation(s)
- Cristina Mihaela Nicolescu
- Institute of Multidisciplinary Research for Science and Technology, Valahia University of Targoviste, 130004 Targoviste, Romania
| | - Marius Bumbac
- Institute of Multidisciplinary Research for Science and Technology, Valahia University of Targoviste, 130004 Targoviste, Romania
- Faculty of Sciences and Arts, Valahia University of Targoviste, 130004 Targoviste, Romania
| | - Claudia Lavinia Buruleanu
- Faculty of Environmental Engineering and Food Science, Valahia University of Targoviste, 130004 Targoviste, Romania
| | - Elena Corina Popescu
- Faculty of Environmental Engineering and Food Science, Valahia University of Targoviste, 130004 Targoviste, Romania
| | - Sorina Geanina Stanescu
- Institute of Multidisciplinary Research for Science and Technology, Valahia University of Targoviste, 130004 Targoviste, Romania
| | - Andreea Antonia Georgescu
- Faculty of Environmental Engineering and Food Science, Valahia University of Targoviste, 130004 Targoviste, Romania
| | - Siramona Maria Toma
- Doctoral School of University of Medicine and Pharmacy "Carol Davila" Bucharest, 050474 Bucharest, Romania
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Sutthiwong N, Lekavat S, Dufossé L. Involvement of Versatile Bacteria Belonging to the Genus Arthrobacter in Milk and Dairy Products. Foods 2023; 12:1270. [PMID: 36981196 PMCID: PMC10048301 DOI: 10.3390/foods12061270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/13/2023] [Accepted: 03/15/2023] [Indexed: 03/19/2023] Open
Abstract
Milk is naturally a rich source of many essential nutrients; therefore, it is quite a suitable medium for bacterial growth and serves as a reservoir for bacterial contamination. The genus Arthrobacter is a food-related bacterial group commonly present as a contaminant in milk and dairy products as primary and secondary microflora. Arthrobacter bacteria frequently demonstrate the nutritional versatility to degrade different compounds even in extreme environments. As a result of their metabolic diversity, Arthrobacter species have long been of interest to scientists for application in various industry and biotechnology sectors. In the dairy industry, strains from the Arthrobacter genus are part of the microflora of raw milk known as an indicator of hygiene quality. Although they cause spoilage, they are also regarded as important strains responsible for producing fermented milk products, especially cheeses. Several Arthrobacter spp. have reported their significance in the development of cheese color and flavor. Furthermore, based on the data obtained from previous studies about its thermostability, and thermoacidophilic and thermoresistant properties, the genus Arthrobacter promisingly provides advantages for use as a potential producer of β-galactosidases to fulfill commercial requirements as its enzymes allow dairy products to be treated under mild conditions. In light of these beneficial aspects derived from Arthrobacter spp. including pigmentation, flavor formation, and enzyme production, this bacterial genus is potentially important for the dairy industry.
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Coelho MC, Malcata FX, Silva CCG. Distinct Bacterial Communities in São Jorge Cheese with Protected Designation of Origin (PDO). Foods 2023; 12:foods12050990. [PMID: 36900508 PMCID: PMC10000650 DOI: 10.3390/foods12050990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/22/2023] [Accepted: 02/24/2023] [Indexed: 03/02/2023] Open
Abstract
São Jorge cheese is an iconic product of the Azores, produced from raw cow's milk and natural whey starter (NWS). Although it is produced according to Protected Designation of Origin (PDO) specifications, the granting of the PDO label depends crucially on sensory evaluation by trained tasters. The aim of this work was to characterize the bacterial diversity of this cheese using next-generation sequencing (NGS) and to identify the specific microbiota that contributes most to its uniqueness as a PDO by distinguishing the bacterial communities of PDO and non-PDO cheeses. The NWS and curd microbiota was dominated by Streptococcus and Lactococcus, whereas Lactobacillus and Leuconostoc were also present in the core microbiota of the cheese along with these genera. Significant differences (p < 0.05) in bacterial community composition were found between PDO cheese and non-certified cheese; Leuconostoc was found to play the chief role in this regard. Certified cheeses were richer in Leuconostoc, Lactobacillus and Enterococcus, but had fewer Streptococcus (p < 0.05). A negative correlation was found between contaminating bacteria, e.g., Staphylococcus and Acinetobacter, and the development of PDO-associated bacteria such as Leuconostoc, Lactobacillus and Enterococcus. A reduction in contaminating bacteria was found to be crucial for the development of a bacterial community rich in Leuconostoc and Lactobacillus, thus justifying the PDO seal of quality. This study has helped to clearly distinguish between cheeses with and without PDO based on the composition of the bacterial community. The characterization of the NWS and the cheese microbiota can contribute to a better understanding of the microbial dynamics of this traditional PDO cheese and can help producers interested in maintaining the identity and quality of São Jorge PDO cheese.
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Affiliation(s)
- Márcia C. Coelho
- School of Agrarian and Environmental Sciences, University of the Azores, 9700-042 Angra do Heroísmo, Portugal
| | - Francisco Xavier Malcata
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Department of Chemical Engineering, Faculty of Engineering, University of Porto, 4200-465 Oporto, Portugal
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Oporto, Portugal
| | - Célia C. G. Silva
- School of Agrarian and Environmental Sciences, University of the Azores, 9700-042 Angra do Heroísmo, Portugal
- Institute of Agricultural and Environmental Research and Technology (IITAA), University of the Azores, 9700-042 Angra do Heroísmo, Portugal
- Correspondence:
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Rangel-ortega SDC, Campos-múzquiz LG, Charles-rodriguez AV, Chávez-gonzaléz ML, Palomo-ligas L, Contreras-esquivel JC, Solanilla-duque JF, Flores-gallegos C, Rodríguez-herrera R. Biological control of pathogens in artisanal cheeses. Int Dairy J 2023. [DOI: 10.1016/j.idairyj.2023.105612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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Ngampuak V, Thongmee A, Pongpoungphet N, Wongwailikhit K, Kanchanaphum P. Probiotic Properties of Exopolysaccharide-Producing Bacteria from Natto. Int J Food Sci 2023; 2023:3298723. [PMID: 36762123 DOI: 10.1155/2023/3298723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 12/07/2022] [Accepted: 01/17/2023] [Indexed: 02/04/2023]
Abstract
Natto is a traditional Japanese food made from soybeans fermented with Bacillus subtilis var. natto. It is also a famous food in Thailand. Potential probiotics were screened from natto. Bacillus subtilis strain VN5 produced the most quantity of exopolysaccharide (EPS), so it was selected to study the properties of microbial EPS and probiotics. The Fourier transform infrared spectrometer or FT-IR spectroscopy confirmed the presence of carboxyl and hydroxyl groups. The patterns of FT-IR and levans are similar. The basic properties of probiotics were revealed. The 90% of VN5 strain resisted lysozyme within 30 min. VN5 survived under acidic conditions (pH 1-6), and the survival rate in 0.3%, 0.5%, and 1% bile solutions for 24 h was 100%. Unfortunately, VN5 did not inhibit the growth of Escherichia coli, Staphylococcus aureus, and Salmonella typhi. Gamma hemolysis was determined in VN5 strain. The finding on Bacillus subtilis strain (VN5) from natto paves the way to a high potential, useful new strain of probiotics.
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Akamine IT, Mansoldo FRP, Vermelho AB. Probiotics in the Sourdough Bread Fermentation: Current Status. Fermentation 2023; 9:90. [DOI: 10.3390/fermentation9020090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Sourdough fermentation is an ancient technique to ferment cereal flour that improves bread quality, bringing nutritional and health benefits. The fermented dough has a complex microbiome composed mainly of lactic acid bacteria and yeasts. During fermentation, the production of metabolites and chemical reactions occur, giving the product unique characteristics and a high sensory quality. Mastery of fermentation allows adjustment of gluten levels, delaying starch digestibility, and increasing the bio-accessibility of vitamins and minerals. This review focuses on the main steps of sourdough fermentation, the microorganisms involved, and advances in bread production with functional properties. The impact of probiotics on human health, the metabolites produced, and the main microbial enzymes used in the bakery industry are also discussed.
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Vachkova E, Petrova V, Grigorova N, Ivanova Z, Beev G. Evaluation of the Anticancer and Probiotic Potential of Autochthonous (Wild) Lacticaseibacillus paracasei Strains from New Ecological Niches as a Possible Additive for Functional Dairy Foods. Foods 2023; 12. [PMID: 36613399 DOI: 10.3390/foods12010185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/19/2022] [Accepted: 12/27/2022] [Indexed: 01/03/2023] Open
Abstract
Probiotics such as Lactobacillus spp. could modulate the intestinal microbiota composition, supporting gastrointestinal tract barrier function and benefiting human health. To evaluate the anticancer and probiotic properties of potentially active autochthonous Lacticaseibacillus paracasei strains on proliferating and differentiated enterocytes, human colon adenocarcinoma cell line HT29 was used as a model. The lactic acid bacteria (LAB) were isolated from new ecological niches—mountain anthills populated by redwood ants (Formica rufa L.). Human colorectal adenocarcinoma cells (HT29, ATCC, HTB-38™) were treated for twenty-four hours with supernatants (SNs) derived from four strains of Lacticaseibacillus paracasei: P4, C8, C15 and M2.1. An MTT assay, alkaline phosphatase activity, IAP, Bax and Bcl-2 gene expression analysis (RT-qPCR) and the Bax/Bcl-2 ratio were evaluated. The MTT assay revealed that the observed effects varied among groups. However, 10% neutralized supernatants from P4, C8, C15 and M2.1 strains did not show cytotoxic effects. In contrast to non-differentiated cells, a significant (p < 0.001) rise in ALP activity in all treatments, with an average of 18%, was established in differentiated cells. The IAP expression was remarkably downregulated in the differentiated M2.1 group (p < 0.05) and upregulated in the non-differentiated P4 (p < 0.05) and M2.1 (p < 0.05) groups. The Bax/Bcl-2 quantity expression ratio in P4 was significantly (p < 0.05) upregulated in proliferating cancer cells, but in P4- and M2.1-differentiated cells these values were downregulated (p < 0.05). The obtained results indicate that the isolated L. paracasei strains possess anticancer and probiotic properties and could be used as additives for functional dairy foods and thus benefit human health.
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Bedassa A, Nahusenay H, Asefa Z, Sisay T, Girmay G, Kovac J, Vipham JL, Zewdu A. Prevalence and associated risk factors for Salmonella enterica contamination of cow milk and cottage cheese in Ethiopia. Int J Food Contam 2023; 10:2. [PMID: 36811093 PMCID: PMC9938040 DOI: 10.1186/s40550-023-00101-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 01/06/2023] [Indexed: 02/19/2023]
Abstract
Animal sourced foods, such as dairy products, are common sources of Salmonella enterica, a foodborne pathogen of increasing global concern, particularly in developing countries. In Ethiopia, most data on the prevalence of Salmonella in dairy products is highly varied and limited to a specific region or district. Furthermore, there is no data available on the risk factors for Salmonella contamination of cow milk and cottage cheese in Ethiopia. This study was therefore conducted to determine the presence of Salmonella throughout the Ethiopian dairy value chain and to identify risk factors for contamination with Salmonella. The study was carried out in three regions of Ethiopia, including Oromia, Southern Nations, Nationalities and Peoples, and Amhara during a dry season. A total 912 samples were collected from milk producers, collectors, processors, and retailers. Samples were tested for Salmonella using the ISO 6579-1: 2008 method, followed by PCR confirmation. Concurrent with sample collection, a survey was administered to study participants to identify risk factors associated with Salmonella contamination. Salmonella contamination was highest in raw milk samples at the production (19.7%) and at milk collection (21.3%) levels. No significant difference in the prevalence of Salmonella contamination among regions was detected (p > 0.05). Regional differences were apparent for cottage cheese, with the highest prevalence being in Oromia (6.3%). Identified risk factors included the temperature of water used for cow udder washing, the practice of mixing milk lots, the type of milk container, use of refrigeration, and milk filtration. These identified factors can be leveraged to develop targeted intervention strategies aimed at reducing the prevalence of Salmonella in milk and cottage cheese in Ethiopia.
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Affiliation(s)
- Abdi Bedassa
- grid.463251.70000 0001 2195 6683Ethiopian Institute of Agricultural Research, National Agricultural Biotechnology Research Center, PO Box 249, Holeta, Ethiopia
| | - Henok Nahusenay
- grid.463251.70000 0001 2195 6683Ethiopian Institute of Agricultural Research, Megenagna Near Egziarab Church, P.O.Box: 2003, Addis Ababa, Ethiopia
| | - Zerihun Asefa
- grid.463251.70000 0001 2195 6683Ethiopian Institute of Agricultural Research, Holeta Agricultural Research Centre, PO Box 031, Holeta, Ethiopia
| | - Tesfaye Sisay
- grid.7123.70000 0001 1250 5688Institute of Biotechnology, College of Natural and Computational Sciences, New Graduate Building, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia
| | - Gebrerufael Girmay
- grid.463251.70000 0001 2195 6683Ethiopian Institute of Agricultural Research, National Agricultural Biotechnology Research Center, PO Box 249, Holeta, Ethiopia
| | - Jasna Kovac
- grid.29857.310000 0001 2097 4281Department of Food Science, The Pennsylvania State University, 437 Erickson Food Science Building, University Park, State College, PA 16802 USA
| | - Jessie L. Vipham
- grid.36567.310000 0001 0737 1259Department of Animal Sciences and Industry, Kansas State University, 247 Weber Hall, Manhattan, KS 66506 USA
| | - Ashagrie Zewdu
- grid.7123.70000 0001 1250 5688Center for Food Science and Nutrition, Addis Ababa University, New Graduate Building, College of Natural Sciences, P.O. Box 1176, Addis Ababa, Ethiopia
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Flórez AB, Vázquez L, Rodríguez J, Mayo B. Phenotypic and Safety Assessment of the Cheese Strain Lactiplantibacillus plantarum LL441, and Sequence Analysis of its Complete Genome and Plasmidome. Int J Mol Sci 2022; 24. [PMID: 36614048 DOI: 10.3390/ijms24010605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/20/2022] [Accepted: 12/27/2022] [Indexed: 12/31/2022] Open
Abstract
This work describes the phenotypic typing and complete genome analysis of LL441, a dairy Lactiplantibacillus plantarum strain. LL441 utilized a large range of carbohydrates and showed strong activity of some carbohydrate-degrading enzymes. The strain grew slowly in milk and produced acids and ketones along with other volatile compounds. The genome of LL441 included eight circular molecules, the bacterial chromosome, and seven plasmids (pLL441-1 through pLL441-7), ranging in size from 8.7 to 53.3 kbp. Genome analysis revealed vast arrays of genes involved in carbohydrate utilization and flavor formation in milk, as well as genes providing acid and bile resistance. No genes coding for virulence traits or pathogenicity factors were detected. Chromosome and plasmids were packed with insertion sequence (IS) elements. Plasmids were also abundant in genes encoding heavy metal resistance traits and plasmid maintenance functions. Technologically relevant phenotypes linked to plasmids, such as the production of plantaricin C (pLL441-1), lactose utilization (pLL441-2), and bacteriophage resistance (pLL441-4), were also identified. The absence of acquired antibiotic resistance and of phenotypes and genes of concern suggests L. plantarum LL441 be safe. The strain might therefore have a use as a starter or starter component in dairy and other food fermentations or as a probiotic.
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Gołaś-Prądzyńska M, Łuszczyńska M, Rola JG. Dairy Products: A Potential Source of Multidrug-Resistant Enterococcus faecalis and Enterococcus faecium Strains. Foods 2022; 11. [PMID: 36553858 DOI: 10.3390/foods11244116] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/15/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022] Open
Abstract
This study attempts to present the antimicrobial resistance, virulence and resistance genes of Enterococcus faecalis and Enterococcus faecium isolated from raw goat's and sheep's milk and cheese. Strains were identified by PCR. The dominant species was E. faecalis (77.8%) and was most often isolated from raw goat's milk. The percentage of antimicrobial-resistant E. faecalis isolates was higher than that of E. faecium isolates, the former most frequently resistant to lincomycin (98%), tetracycline (63%) and streptomycin (16%). Fourteen (22.3%) E. faecalis and 2 (11.1%) E. faecium isolates were identified as multidrug-resistant (MDR). All MDR E. faecalis strains also had virulence genes, whereas one of the two E. faecium strains had them. The most prevalent virulence genes in E. faecalis isolates were asa1 (69.8%) and gelE (57.1%). The most prevalent resistance genes found in both bacterial species were tet(M) (43.2%) and vgaA (22.2%). Enterococci from dairy products are confirmed to be a potential source of the spread of antimicrobial resistance, MDR strains, and virulence and resistance genes. This study highlights several aspects of the virulence and pathogenicity of E. faecalis and E. faecium isolated from dairy products-aspects which are indications for their ongoing monitoring.
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