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Zhang Z, Zhang ZH, He R, Zhao G, Yu Y, Zhang R, Gao X. Research advances in technologies and mechanisms to regulate vinegar flavor. Food Chem 2024; 460:140783. [PMID: 39137579 DOI: 10.1016/j.foodchem.2024.140783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 07/30/2024] [Accepted: 08/05/2024] [Indexed: 08/15/2024]
Abstract
New vinegar needs a long maturing time to improve its poor flavor before sale, which greatly increases its production cost. Therefore, it is urgent to explore regulation technologies to accelerate vinegar flavor maturation. Based on literature and our research, this review introduces the latest advances in flavor regulation technologies of vinegar including microbial fortification/multi starters fermentation, key production processes optimization and novel physical processing technologies. Microbial fortification or multi starters fermentation accelerates vinegar flavor maturation via enhancing total acids, esters and aroma precursors content in vinegar. Adjusting raw materials composition, fermentation temperature, and oxygen flow reasonably increase alcohols, organic acids, polyphenols and esters levels via generating more corresponding precursors in vinegar, thereby improving its flavor. Furthermore, novel processing technologies greatly promote conversion of alcohols into acids and esters in vinegar, shortening flavor maturation time for over six months. Meanwhile, the corresponding mechanisms are discussed and future research directions are addressed.
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Affiliation(s)
- Zhankai Zhang
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Zhi-Hong Zhang
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Ronghai He
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Guozhong Zhao
- College of Food Science and Engineering, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Yongjian Yu
- School of Grain, Jiangsu University of Science & Technology, 666 Changxiang Avenue, Zhenjiang 212000, China
| | - Rong Zhang
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Xianli Gao
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China.
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2
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Diet Diversification and Priming with Kunu: An Indigenous Probiotic Cereal-Based Non-Alcoholic Beverage in Nigeria. BEVERAGES 2023. [DOI: 10.3390/beverages9010014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Kunu is a fermented non-alcoholic beverage consumed all over Nigeria. The drink is served as an alternative to alcohol due to its perceived extreme nourishing and therapeutic properties. Varieties of this beverage are determined mostly by the type of grain, the supplements, sensory additives used, and the process employed during its production. Dietary quality is paramount in nutritional well-being and a key factor in human overall health development. The nutritional quality of grains utilised for Kunu production makes the drink more appealing to a large growing population when compared to some other drinks. Some use Kunu drink as an infant weaning drink, thus serving as a priming beverage for infants due to its rich probiotic and nutritional properties. However, this beverage’s short shelf-life has limited its production scale. This review therefore elaborates succinctly on the diverse therapeutic nutritional properties of the Kunu beverage and the effect of additives and fermentation on the microbial dynamics during Kunu production, as well as the prospect of Kunu in diet diversification and priming for weaning infants.
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3
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Haryani Y, Halid NA, Guat GS, Nor-Khaizura MAR, Hatta MAM, Sabri S, Radu S, Hasan H. High prevalence of multiple antibiotic resistance in fermented food-associated lactic acid bacteria in Malaysia. Food Control 2022. [DOI: 10.1016/j.foodcont.2022.109558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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4
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Pswarayi F, Gänzle M. African cereal fermentations: A review on fermentation processes and microbial composition of non-alcoholic fermented cereal foods and beverages. Int J Food Microbiol 2022; 378:109815. [PMID: 35763938 DOI: 10.1016/j.ijfoodmicro.2022.109815] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 05/06/2022] [Accepted: 06/14/2022] [Indexed: 11/15/2022]
Abstract
Africa has a rich tradition of cereal fermentations to produce diverse products including baked goods, porridges, non-alcoholic beverages and alcoholic beverages. Diversity also relates to the choice of the fermentation substrates, which include wheat, maize, teff, sorghum and millet, and the fermentation processes that are used in food production. For fermentation processes that are used in baking and brewing, it is well established that the composition of fermentation microbiota and thus the impact of fermentation on product quality is determined by the choice of fermentation conditions. This link has not been systematically explored for African cereal fermentations. This review therefore aims to provide an overview on the diversity of African fermented cereal products, and to interrogate currently available literature data with respect to the impact of fermentation substrate and fermentation processes on the assembly of fermentation microorganisms and product quality.
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Affiliation(s)
- Felicitas Pswarayi
- University of Alberta, Dept. of Agricultural, Food and Nutritional Science, Edmonton, Canada
| | - Michael Gänzle
- University of Alberta, Dept. of Agricultural, Food and Nutritional Science, Edmonton, Canada..
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5
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Adesulu-Dahunsi AT, Dahunsi SO, Ajayeoba TA. Co-occurrence of Lactobacillus Species During Fermentation of African Indigenous Foods: Impact on Food Safety and Shelf-Life Extension. Front Microbiol 2022; 13:684730. [PMID: 35464919 PMCID: PMC9021961 DOI: 10.3389/fmicb.2022.684730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 01/31/2022] [Indexed: 11/25/2022] Open
Abstract
The benefits derived from fermented foods and beverages have placed great value on their acceptability worldwide. Food fermentation technologies have been employed for thousands of years and are considered essential processes for the production and preservation of foods, with the critical roles played by the autochthonous fermenting food-grade microorganisms in ensuring food security and safety, increased shelf life, and enhanced livelihoods of many people in Africa, particularly the marginalized and vulnerable groups. Many indigenous fermented foods and beverages of Africa are of plant origin. In this review, the predominance, fermentative activities, and biopreservative role of Lactobacillus spp. during production of indigenous foods and beverages, the potential health benefit of probiotics, and the impact of these food-grade microorganisms on food safety and prolonged shelf life are discussed. During production of African indigenous foods (with emphasis on cereals and cassava-based food products), fermentation occurs in succession; the first group of microorganisms to colonize the fermenting substrates are lactic acid bacteria (LAB) with the diversity and dominance of Lactobacillus spp. The Lactobacillus spp. multiply rapidly in the fermentation matrix, by taking up nutrients from the surrounding environments, and cause rapid acidification in the fermenting system via the production of organic compounds that convert fermentable sugars into mainly lactic acid. Production of these compounds in food systems inhibits spoilage microorganisms, which has a direct effect on food quality and safety. The knowledge of microbial interaction and succession during food fermentation will assist the food industry in producing functional foods and beverages with improved nutritional profiling and technological attributes, as Lactobacillus strains isolated during fermentation of several African indigenous foods have demonstrated desirable characteristics that make them safe for use as probiotic microorganisms and even as a starter culture in small- and large-scale/industrial food production processes.
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Affiliation(s)
| | - Samuel Olatunde Dahunsi
- Microbiology Programme, College of Agriculture, Engineering and Science, Bowen University, Iwo, Nigeria
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6
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Verma DK, Thakur M, Singh S, Tripathy S, Gupta AK, Baranwal D, Patel AR, Shah N, Utama GL, Niamah AK, Chávez-González ML, Gallegos CF, Aguilar CN, Srivastav PP. Bacteriocins as antimicrobial and preservative agents in food: Biosynthesis, separation and application. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.101594] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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7
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Antifungal activity of lactic acid bacteria isolated from kunu-zaki, a cereal-based Nigerian fermented beverage. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.101648] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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8
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Tan G, Hu M, Li X, Li X, Pan Z, Li M, Li L, Wang Y, Zheng Z. Microbial Community and Metabolite Dynamics During Soy Sauce Koji Making. Front Microbiol 2022; 13:841529. [PMID: 35283863 PMCID: PMC8914375 DOI: 10.3389/fmicb.2022.841529] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 02/03/2022] [Indexed: 12/14/2022] Open
Abstract
Koji making is a pre-fermentation stage in soy sauce manufacturing that impacts final product quality. Previous studies have provided valuable insights into the microbial species present in koji. However, changes in microbial community functional potential during koji-making are not well-known, nor are the associations among microbial populations and flavoring characteristics. In the present study, we investigated the succession of microbial communities, microbial community functional potential, metabolite profiles, and associations among microbial community members/functions with metabolites during koji making using shotgun metagenomic and metabolomic analyses. Firmicutes, Proteobacteria, and Ascomycota were identified as the most abundant microbial phyla in early koji making (0–12 h). Aspergillus (fungi) and Weissella (bacteria) exhibited marked abundance increases (0.98–38.45% and 0.31–30.41%, respectively) after 48 h of fermentation. Metabolite analysis revealed that aspartic acid, lysine, methyl acetate, isovaleraldehyde, and isoamyl alcohol concentrations increased ∼7-, 9-, 5-, 49-, and 10-fold after 48 h of fermentation. Metagenomic profiling demonstrated that koji communities were dominated by genes related to carbohydrate metabolism and amino acid metabolism, but functional profiles exhibited marked shifts after 24 h of fermentation. The abundances of genes within the categories of carbohydrate and amino acid metabolism all increased during koji making, except for pyruvate metabolism, glycolysis/gluconeogenesis, and the citrate cycle. Correlational analyses indicated that Aspergillus, Lactococcus, Enterococcus, Corynebacterium, and Kocuria abundances were positively correlated with 15 amino acid concentrations (all p < 0.05), while Weissella abundances were positively correlated with concentrations of volatile flavor compounds, including eight amino acids, phenylacetaldehyde, acetic acid, 2,3-butanediol, ethyl acetate, and ethanol (p < 0.05). These results provide valuable information for understanding the microbial-associated mechanisms of flavor formation during koji making.
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Affiliation(s)
- Guiliang Tan
- School of Material Science and Food Engineering, Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan, China
| | - Min Hu
- School of Environmental and Safety Engineering, Changzhou University, Changzhou, China
- *Correspondence: Min Hu,
| | - Xiangli Li
- School of Health Industry, Zhongshan Torch Vocational and Technical College, Zhongshan, China
| | - Xueyan Li
- School of Material Science and Food Engineering, Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan, China
| | - Ziqiang Pan
- School of Material Science and Food Engineering, Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan, China
| | - Mei Li
- School of Material Science and Food Engineering, Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan, China
| | - Lin Li
- School of Material Science and Food Engineering, Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan, China
| | - Yi Wang
- School of Material Science and Food Engineering, Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan, China
- Yi Wang,
| | - Ziyi Zheng
- School of Material Science and Food Engineering, Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan, China
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9
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Jideani VA, Ratau MA, Okudoh VI. Non-Alcoholic Pearl Millet Beverage Innovation with Own Bioburden: Leuconostoc mesenteroides, Pediococcus pentosaceus and Enterococcus gallinarum. Foods 2021; 10:foods10071447. [PMID: 34206492 PMCID: PMC8305081 DOI: 10.3390/foods10071447] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 06/16/2021] [Accepted: 06/17/2021] [Indexed: 01/02/2023] Open
Abstract
The appropriate solution to the problem of quality variability and microbial stability of traditional non-alcoholic pearl millet fermented beverages (NAPMFB) is the use of starter cultures. However, potential starter cultures need to be tested in the production process. We aimed to identify and purify bioburden lactic acid bacteria from naturally fermented pearl millet slurry (PMS) and assess their effectiveness as cultures for the production of NAPMFB. Following the traditional Kunun-zaki process, the PMS was naturally fermented at 37 °C for 36 h. The pH, total titratable acidity (TTA), lactic acid bacteria (LAB), total viable count (TVC) and the soluble sugar were determined at 3 h interval. The presumptive LAB bacteria were characterized using a scanning electron microscope, biochemical tests and identified using the VITEK 2 Advanced Expert System for microbial identification. The changes in pH and TTA followed a non-linear exponential model with the rate of significant pH decrease of 0.071 h−1, and TTA was inversely proportional to the pH at the rate of 0.042 h−1. The Gompertz model with the mean relative deviation modulus, 0.7% for LAB and 2.01% for TVC explained the variability in microbial growth during fermentation. The LAB increased significantly from 6.97 to 7.68 log cfu/mL being dominated by Leuconostoc, Pediococcus, Streptococcus and Enterococcus with an optimum fermentation time of 18 h at 37 °C and 4.06 pH. L. mesenteroides and P. pentosaceus created an acidic environment while E. gallinarum increased the pH of the pearl millet extract (PME). Innovative NAPMFB was produced through assessment of LAB from PMS to PME fermented with L. mesentoroides (0.05%) and P. pentosaceus (0.025%) for 18 h, thereby reducing the production time from the traditional 24 h.
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Affiliation(s)
- Victoria A. Jideani
- Biopolymer Research for Food Security, Department of Food Technology, Faculty of Applied Sciences, Bellville Campus, Cape Peninsula University of Technology, Bellville 7535, South Africa;
- Correspondence:
| | - Mmaphuti A. Ratau
- Biopolymer Research for Food Security, Department of Food Technology, Faculty of Applied Sciences, Bellville Campus, Cape Peninsula University of Technology, Bellville 7535, South Africa;
| | - Vincent I. Okudoh
- Bioresource Engineering Research Group, Department of Biotechnology, Faculty of Applied Sciences, District-Six Campus, Cape Peninsula University of Technology, Bellville 7535, South Africa;
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10
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Wang Y, Wu J, Lv M, Shao Z, Hungwe M, Wang J, Bai X, Xie J, Wang Y, Geng W. Metabolism Characteristics of Lactic Acid Bacteria and the Expanding Applications in Food Industry. Front Bioeng Biotechnol 2021; 9:612285. [PMID: 34055755 PMCID: PMC8149962 DOI: 10.3389/fbioe.2021.612285] [Citation(s) in RCA: 185] [Impact Index Per Article: 61.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 04/16/2021] [Indexed: 12/31/2022] Open
Abstract
Lactic acid bacteria are a kind of microorganisms that can ferment carbohydrates to produce lactic acid, and are currently widely used in the fermented food industry. In recent years, with the excellent role of lactic acid bacteria in the food industry and probiotic functions, their microbial metabolic characteristics have also attracted more attention. Lactic acid bacteria can decompose macromolecular substances in food, including degradation of indigestible polysaccharides and transformation of undesirable flavor substances. Meanwhile, they can also produce a variety of products including short-chain fatty acids, amines, bacteriocins, vitamins and exopolysaccharides during metabolism. Based on the above-mentioned metabolic characteristics, lactic acid bacteria have shown a variety of expanded applications in the food industry. On the one hand, they are used to improve the flavor of fermented foods, increase the nutrition of foods, reduce harmful substances, increase shelf life, and so on. On the other hand, they can be used as probiotics to promote health in the body. This article reviews and prospects the important metabolites in the expanded application of lactic acid bacteria from the perspective of bioengineering and biotechnology.
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Affiliation(s)
- Yaqi Wang
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
| | - Jiangtao Wu
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
| | - Mengxin Lv
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
| | - Zhen Shao
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
| | - Meluleki Hungwe
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
| | - Jinju Wang
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
| | - Xiaojia Bai
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
| | - Jingli Xie
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Yanping Wang
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
| | - Weitao Geng
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
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11
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Ademola O, Saha Turna N, Liverpool-Tasie LSO, Obadina A, Wu F. Mycotoxin reduction through lactic acid fermentation: Evidence from commercial ogi processors in southwest Nigeria. Food Control 2021. [DOI: 10.1016/j.foodcont.2020.107620] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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12
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Chibuzor-Onyema IE, Ezeokoli OT, Sulyok M, Notununu I, Petchkongkaew A, Elliott CT, Adeleke RA, Krska R, Ezekiel CN. Metataxonomic analysis of bacterial communities and mycotoxin reduction during processing of three millet varieties into ogi, a fermented cereal beverage. Food Res Int 2021; 143:110241. [PMID: 33992353 DOI: 10.1016/j.foodres.2021.110241] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 02/08/2021] [Accepted: 02/14/2021] [Indexed: 12/16/2022]
Abstract
Ogi is a fermented cereal beverage, made primarily from maize (Zea mays) and rarely from millets. Unlike maize-based ogi, little is known about the bacterial community and mycotoxin profile during the production of millet-based ogi. Therefore, the bacterial community dynamics and mycotoxin reduction during ogi processing from three millet varieties were investigated using next-generation sequencing of the 16S rRNA gene and liquid chromatography-tandem mass spectrometry, respectively. A total of 1163 amplicon sequence variants (ASVs) were obtained, with ASV diversity across time intervals influenced by processing stage and millet variety. ASV distribution among samples suggested that the souring stage was more influenced by millet variety than the steeping stage, and that souring may be crucial for the quality attributes of the ogi. Furthermore, bacterial community structure during steeping and souring was significantly differentiated (PERMANOVA, P < 0.05) between varieties, with close associations observed for closely-related millet varieties. Taxonomically, Firmicutes, followed by Actinobacteria, Bacteroidetes, Cyanobacteria and Proteobacteria phyla were relatively abundant (>1%). Lactic acid bacteria, such as Burkholderia-Caballeronia-Paraburkholderia, Lactobacillus, Lactococcus and Pediococcus, dominated most fermentation stages, suggesting their roles as key fermentative and functional bacteria in relation to mycotoxin reduction. About 52-100%, 58-100% and 100% reductions in mycotoxin (aflatoxins, beauvericin, citrinin, moniliformin, sterigmatocystin and zearalenone) concentrations were recorded after processing of white fonio, brown fonio and finger millet, respectively, into ogi. This study provides new knowledge of the dominant bacterial genera vital for the improvement of millet-based ogi through starter culture development and as well, elucidates the role of processing in reducing mycotoxins in millet ogi.
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Affiliation(s)
| | - Obinna T Ezeokoli
- Pathogenic Yeast Research Group, Department of Microbial, Biochemical and Food Biotechnology, University of the Free State, Bloemfontein, South Africa
| | - Michael Sulyok
- Institute of Bioanalytics and Agro-Metabolomics, Department of Agrobiotechnology (IFA-Tulln), University of Natural Resources and Life Sciences Vienna (BOKU), Konrad Lorenz-Str. 20, A-3430 Tulln, Austria
| | - Iviwe Notununu
- Microbiology and Environmental Biotechnology Research Group, Agricultural Research Council-Institute for Soil, Climate and Water, Pretoria, South Africa; Department of Biochemistry, Genetics and Microbiology, University of Pretoria, South Africa
| | - Awanwee Petchkongkaew
- School of Food Science and Technology, Faculty of Science and Technology, Thammasat University (Rangsit Campus), Pathumthani, Thailand; Institute for Global Food Security, School of Biological Sciences, Queens University Belfast, Belfast BT9 5BN, Northern Ireland, United Kingdom
| | - Christopher T Elliott
- Institute for Global Food Security, School of Biological Sciences, Queens University Belfast, Belfast BT9 5BN, Northern Ireland, United Kingdom
| | - Rasheed A Adeleke
- Unit for Environmental Science and Management, North-West University (Potchefstroom Campus), Potchefstroom, South Africa
| | - Rudolf Krska
- Institute of Bioanalytics and Agro-Metabolomics, Department of Agrobiotechnology (IFA-Tulln), University of Natural Resources and Life Sciences Vienna (BOKU), Konrad Lorenz-Str. 20, A-3430 Tulln, Austria; Institute for Global Food Security, School of Biological Sciences, Queens University Belfast, Belfast BT9 5BN, Northern Ireland, United Kingdom
| | - Chibundu N Ezekiel
- Department of Microbiology, Babcock University, Ilishan Remo, Ogun State, Nigeria; Institute of Bioanalytics and Agro-Metabolomics, Department of Agrobiotechnology (IFA-Tulln), University of Natural Resources and Life Sciences Vienna (BOKU), Konrad Lorenz-Str. 20, A-3430 Tulln, Austria.
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Comprehensive investigation on volatile and non-volatile metabolites in broccoli juices fermented by animal- and plant-derived Pediococcus pentosaceus. Food Chem 2020; 341:128118. [PMID: 33022577 DOI: 10.1016/j.foodchem.2020.128118] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 07/23/2020] [Accepted: 09/13/2020] [Indexed: 12/14/2022]
Abstract
A metabolomics approach was employed to investigate differences and correlations among key odorants and non-volatile metabolites in broccoli juices fermented by plant- and animal-derived Pediococcus pentosaceus. Forty volatile metabolites were identified by headspace solid-phase microextraction/gas chromatography-mass spectrometry. According to orthogonal projections to latent structures-differential analysis, 24 and 21 differential volatiles were detected after fermentation by plant- and animal-derived P. pentosaceus, respectively. The concentrations of 10 odorants (OAV ≥ 1) detected by gas chromatography-olfactometry changed significantly after fermentation by P. pentosaceus. Using ultrahigh-pressure liquid chromatography/quadrupole time-of-flight mass spectrometry, 49.47% of the non-volatile metabolites were classified as lipids and lipid-like molecules. The relative expressions of five non-volatile metabolites that exhibited significant correlations with odorants using Spearman correlation analysis changed significantly after fermentation. Fermentation with animal- and plant-derived P. pentosaceus can therefore change key odorants and non-volatile metabolites in broccoli juice that contribute to the characteristic organoleptic properties of products.
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Key Words
- 1-Hexanol (PubChem CID: 8103)
- 1-Octen-3-ol (PubChem CID: 18827)
- 2,4-Hexadienal, (E,E)- (PubChem CID: 637564)
- 2-Hexen-1-ol, (E)- (PubChem CID: 5,318,042)
- 2-Hexenal, (E)- (PubChem CID: 5281168);
- 3-Hexen-1-ol, (Z)- (PubChem CID: 5281167)
- Dimethyl disulfide (PubChem CID: 12232)
- Dimethyl trisulfide (PubChem CID: 19310)
- Fermented broccoli juice
- Furan, 2-ethyl- (PubChem CID: 18554)
- Furan, 2-pentyl (PubChem CID: 19602)
- Hexanal (PubChem CID: 6184)
- Key odorant
- Non-volatile metabolite
- Pediococcus pentosaceus
- Thiocyanic acid, methyl ester (PubChem CID: 11168)
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Ezekiel CN, Oyedele OA, Kraak B, Ayeni KI, Sulyok M, Houbraken J, Krska R. Fungal Diversity and Mycotoxins in Low Moisture Content Ready-To-Eat Foods in Nigeria. Front Microbiol 2020; 11:615. [PMID: 32328050 PMCID: PMC7161469 DOI: 10.3389/fmicb.2020.00615] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 03/19/2020] [Indexed: 12/13/2022] Open
Abstract
Low moisture content ready-to-eat foods vended in Nigerian markets could be pre-packaged or packaged at point of sale. These foods are widely and frequently consumed across Nigeria as quick foods. Despite their importance in the daily diets of Nigerians, a comprehensive study on the diversity of fungi, fungal metabolite production potential, and mycotoxin contamination in the foods has not yet been reported. Therefore, this study assessed the diversity of fungi in 70 samples of low moisture content ready-to-eat foods [cheese balls, garri (cassava-based), granola (a mix of cereals and nuts) and popcorn] in Nigeria by applying a polyphasic approach including morphological examination, genera/species-specific gene marker sequencing and secondary metabolite profiling of fungal cultures. Additionally, mycotoxin levels in the foods were determined by LC-MS/MS. Fungal strains (n = 148) were recovered only from garri. Molecular analysis of 107 representative isolates revealed 27 species belonging to 12 genera: Acremonium, Allophoma, Aspergillus, Cladosporium, Fusarium, Microdochium, Penicillium, Sarocladium, Talaromyces, and Tolypocladium in the Ascomycota, and Fomitopsis and Trametes in the Basidiomycota. To the best of our knowledge Allophoma, Fomitopsis, Microdochium, Tolypocladium, and Trametes are reported in African food for the first time. A total of 21 uncommon metabolites were found in cultures of the following species: andrastin A and sporogen AO1 in Aspergillus flavus; paspalin in A. brunneoviolaceus; lecanoic acid and rugulusovin in A. sydowii; sclerotin A in P. citrinum and Talaromyces siamensis; barceloneic acid, festuclavine, fumigaclavine, isochromophilons (IV, VI, and IX), ochrephilone, sclerotioramin, and sclerotiorin in P. sclerotium; epoxyagroclavine, infectopyron, methylorsellinic acid and trichodermamide C in P. steckii; moniliformin and sporogen AO1 in P. copticola; and aminodimethyloctadecanol in Tolypocladium. Twenty-four mycotoxins in addition to other 73 fungal and plant toxins were quantified in the foods. In garri, cheeseballs, popcorn and granola were 1, 6, 12, and 23 mycotoxins detected, respectively. Deoxynivalenol, fumonisins, moniliformin, aflatoxins and citrinin contaminated 37, 31, 31, 20, and 14% of all food samples, respectively. Overall, citrinin had the highest mean concentration of 1481 μg/kg in the foods, suggesting high citrinin exposures in the Nigerian populace. Fungal and mycotoxin contamination of the foods depend on pre-food and post-food processing practices.
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Affiliation(s)
- Chibundu N. Ezekiel
- Department of Microbiology, Babcock University, Ilishan Remo, Nigeria
- Department of Agrobiotechnology (IFA–Tulln), Institute of Bioanalytics and Agro-Metabolomics, University of Natural Resources and Life Sciences Vienna (BOKU), Tulln, Austria
| | | | - Bart Kraak
- Westerdijk Fungal Biodiversity Institute, Uppsalalaan, Netherlands
| | - Kolawole I. Ayeni
- Department of Microbiology, Babcock University, Ilishan Remo, Nigeria
| | - Michael Sulyok
- Department of Agrobiotechnology (IFA–Tulln), Institute of Bioanalytics and Agro-Metabolomics, University of Natural Resources and Life Sciences Vienna (BOKU), Tulln, Austria
| | - Jos Houbraken
- Westerdijk Fungal Biodiversity Institute, Uppsalalaan, Netherlands
| | - Rudolf Krska
- Department of Agrobiotechnology (IFA–Tulln), Institute of Bioanalytics and Agro-Metabolomics, University of Natural Resources and Life Sciences Vienna (BOKU), Tulln, Austria
- Institute for Global Food Security, School of Biological Sciences, Queen’s University Belfast, Belfast, United Kingdom
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15
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Aka S, Dridi B, Bolotin A, Yapo EA, Koussemon-Camara M, Bonfoh B, Renault P. Characterization of lactic acid bacteria isolated from a traditional Ivoirian beer process to develop starter cultures for safe sorghum-based beverages. Int J Food Microbiol 2020; 322:108547. [PMID: 32097827 DOI: 10.1016/j.ijfoodmicro.2020.108547] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 12/13/2019] [Accepted: 01/31/2020] [Indexed: 12/31/2022]
Abstract
The present study aimed to characterize lactic acid bacteria involved in the different processing steps of tchapalo, a traditional Ivoirian beverage, for their potential application as starter cultures in food and beverages. Lactic acid bacteria (LAB) were therefore isolated and enumerated at different steps of the process on MRS and BEA agars. Of the 465 isolates, 27 produced bacteriocins that inhibit Lactobacillus delbrueckii F/31 strain. Of those, two also inhibited Listeria innocua ATCC 33090, while two others displayed inhibitory activity against L.innocua ATCC 33090, E. faecalis CIP 105042, E. faecalis ATCC 29212, Streptococcus sp. clinical LNSP, E. faecalis CIP 105042 and E. faecium ATCC 51558. The dominant species involved in tchapalo LAB fermentation, as determined by 16S rRNA gene sequencing, were Lactobacillus fermentum (64%), followed by Pediococcus acidilactici (14%). Two strains representing the two dominant species, L. fermentum S6 and P. acidilactici S7, and two potential bacteriocin producers, Weissella confusa AB3E41 and Enterococcus faecium AT1E22, were selected for further characterization. First, genome analysis showed that these strains do not display potential harmful genes such as pathogenic factors or transmissible antibiotic resistance genes. Furthermore, phylogenetic analyses were performed to assess evidence of eventual links to groups of strains with particular properties. They revealed that (i) L. fermentum S6 and P. acidilactici S7 are closely related to strains that ferment plants, (ii) E. faecium AT1E22 belongs to the environmental clade B of E. faecium, while W. confusa is quite similar to other strains also isolated from plant fermentations. Further genome analysis showed that E. faecium AT1E22 contains the Enterocin P gene probably carried by a megaplasmid, whereas no evidence of a bacteriocin gene was found in W. confusa AB3E41. The metabolic and the first step of the probiotic potentials of the different strains were analyzed. Lactobacillus fermentum S6 and P. acidilactici S7 are good candidates to develop starter cultures, and E. faecium AT1E22 should be further tested to confirm its potential as a probiotic strain in the production of sorghum wort.
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Affiliation(s)
- Solange Aka
- UFR des Sciences et Technologies des Aliments, Université Nangui Abrogoua, 02 BP 801 Abidjan 02, Côte d'Ivoire; Centre Suisse de Recherches Scientifiques en Côte d'Ivoire (CSRS), BP 1303 Abidjan 01, Côte d'Ivoire.
| | - Bedis Dridi
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Alexandre Bolotin
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Elysée Armel Yapo
- UFR des Sciences et Technologies des Aliments, Université Nangui Abrogoua, 02 BP 801 Abidjan 02, Côte d'Ivoire; Centre Suisse de Recherches Scientifiques en Côte d'Ivoire (CSRS), BP 1303 Abidjan 01, Côte d'Ivoire
| | - Marina Koussemon-Camara
- UFR des Sciences et Technologies des Aliments, Université Nangui Abrogoua, 02 BP 801 Abidjan 02, Côte d'Ivoire
| | - Bassirou Bonfoh
- Centre Suisse de Recherches Scientifiques en Côte d'Ivoire (CSRS), BP 1303 Abidjan 01, Côte d'Ivoire
| | - Pierre Renault
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
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16
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Chilaka CA, De Boevre M, Atanda OO, De Saeger S. Fate of Fusarium mycotoxins during processing of Nigerian traditional infant foods (ogi and soybean powder). Food Res Int 2019; 116:408-418. [PMID: 30716963 DOI: 10.1016/j.foodres.2018.08.055] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Revised: 08/08/2018] [Accepted: 08/18/2018] [Indexed: 11/28/2022]
Abstract
The influence of processing methods used to produce traditional Nigerian infant foods (ogi and processed soybean powder) on four European Union regulated Fusarium mycotoxins using naturally and artificially contaminated raw materials was studied using liquid chromatography-tandem mass spectrometry. Generally, there was a significant reduction of all the mycotoxins when compared to the initial concentration of the raw materials. Reduction in concentrations of the mycotoxins during ogi-processing started immediately after 36 h' steeping/fermentation for all the mycotoxins (fumonisin B1, zearalenone, deoxynivalenol, and T-2 toxin), and proceeded along the process chain (milling and sieving). In addition, deoxynivalenol-3-glucoside (16 ± 3.2 μg/kg) and 3-acetyl-deoxynivalenol (9 ± 5.5 μg/kg) initially absent in the raw maize were detected in the final ogi product. β-zearalenol, hydrolysed fumonisin B1, and HT-2 toxin were also detected at varying concentrations. Regarding soybean processing, a similar trend was observed with fumonisin B1, zearalenone, deoxynivalenol, and T-2 toxin, irrespective of the method used or the initial concentration. Other mycotoxins detected in soybean product include 3-acetyl-deoxynivalenol, 15-acetyl-deoxynivalenol, deoxynivalenol-3-glucoside, HT-2 toxin, neosolaniol, α-zearalenol, β-zearalenol, and zearalenone-14-glucoside. Although there was a reduction in the concentration of the free mycotoxin because of processing, other mycotoxins were detected in the products and thus, may present an additional health risk on consumers.
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Affiliation(s)
- Cynthia Adaku Chilaka
- Centre of Excellence in Mycotoxicology and Public Health, Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium; Department of Food Science and Technology, College of Applied Food Science and Tourism, Michael Okpara University of Agriculture, Umuahia-Ikot Ekpene Road, Umudike, PMB 7267 Umuahia, Abia State, Nigeria.
| | - Marthe De Boevre
- Centre of Excellence in Mycotoxicology and Public Health, Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Olusegun Oladimeji Atanda
- Department of Biological Sciences, McPherson University, KM 96, Lagos-Ibadan Expressway, 110117 Seriki Sotayo, Ogun State, Nigeria
| | - Sarah De Saeger
- Centre of Excellence in Mycotoxicology and Public Health, Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
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17
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Ezekiel CN, Ayeni KI, Ezeokoli OT, Sulyok M, van Wyk DAB, Oyedele OA, Akinyemi OM, Chibuzor-Onyema IE, Adeleke RA, Nwangburuka CC, Hajšlová J, Elliott CT, Krska R. High-Throughput Sequence Analyses of Bacterial Communities and Multi-Mycotoxin Profiling During Processing of Different Formulations of Kunu, a Traditional Fermented Beverage. Front Microbiol 2019; 9:3282. [PMID: 30687270 PMCID: PMC6333642 DOI: 10.3389/fmicb.2018.03282] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 12/17/2018] [Indexed: 02/05/2023] Open
Abstract
Kunu is a traditional fermented single or mixed cereals-based beverage popularly consumed in many parts of West Africa. Presently, the bacterial community and mycotoxin contamination profiles during processing of various kunu formulations have never been comprehensively studied. This study, therefore, investigated the bacterial community and multi-mycotoxin dynamics during the processing of three kunu formulations using high-throughput sequence analysis of partial 16S rRNA gene (hypervariable V3-V4 region) and liquid chromatography tandem mass spectrometry (LC-MS/MS), respectively. A total of 2,303 operational taxonomic units (OTUs) were obtained across six processing stages in all three kunu formulations. Principal coordinate analysis biplots of the Bray-Curtis dissimilarity between bacterial communities revealed the combined influences of formulations and processing steps. Taxonomically, OTUs spanned 13 phyla and 486 genera. Firmicutes (phylum) dominated (relative abundance) most of the processing stages, while Proteobacteria dominated the rest of the stages. Lactobacillus (genus taxa level) dominated most processing stages and the final product (kunu) of two formulations, whereas Clostridium sensu stricto (cluster 1) dominated kunu of one formulation, constituting a novel observation. We further identified Acetobacter, Propionibacterium, Gluconacetobacter, and Gluconobacter previously not associated with kunu processing. Shared phylotypes between all communities were dominated by lactic acid bacteria including species of Lactobacillus, Lactococcus, Leuconostoc, Pediococcus, and Weissella. Other shared phylotypes included notable acetic acid bacteria and potential human enteric pathogens. Ten mycotoxins [3-Nitropropionic acid, aflatoxicol, aflatoxin B1 (AFB1), AFB2, AFM1, alternariol (AOH), alternariolmethylether (AME), beauvericin (BEAU), citrinin, and moniliformin] were quantified at varying concentrations in ingredients for kunu processing. Except for AOH, AME, and BEAU that were retained at minimal levels of < 2 μg/kg in the final product, most mycotoxins in the ingredients were not detectable after processing. In particular, mycotoxin levels were substantially reduced by fermentation, although simple dilution and sieving also contributed to mycotoxin reduction. This study reinforces the perception of kunu as a rich source of bacteria with beneficial attributes to consumer health, and provides in-depth understanding of the microbiology of kunu processing, as well as information on mycotoxin contamination and reduction during this process. These findings may aid the development of starter culture technology for safe and quality kunu production.
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Affiliation(s)
- Chibundu N. Ezekiel
- Department of Microbiology, Babcock University, Ilishan Remo, Nigeria
- Center for Analytical Chemistry, Department of Agrobiotechnology (IFA-Tulln), University of Natural Resources and Life Sciences, Vienna (BOKU), Tulln, Austria
| | - Kolawole I. Ayeni
- Department of Microbiology, Babcock University, Ilishan Remo, Nigeria
| | - Obinna T. Ezeokoli
- Microbiology and Environmental Biotechnology Research Group, Agricultural Research Council-Institute for Soil, Climate and Water, Pretoria, South Africa
- Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
| | - Michael Sulyok
- Center for Analytical Chemistry, Department of Agrobiotechnology (IFA-Tulln), University of Natural Resources and Life Sciences, Vienna (BOKU), Tulln, Austria
| | - Deidre A. B. van Wyk
- Microbiology and Environmental Biotechnology Research Group, Agricultural Research Council-Institute for Soil, Climate and Water, Pretoria, South Africa
- Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
| | | | | | | | - Rasheed A. Adeleke
- Microbiology and Environmental Biotechnology Research Group, Agricultural Research Council-Institute for Soil, Climate and Water, Pretoria, South Africa
- Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
| | - Cyril C. Nwangburuka
- Department of Agriculture and Industrial Technology, Babcock University, Ilishan Remo, Nigeria
| | - Jana Hajšlová
- University of Chemistry and Technology, Prague, Czechia
| | - Christopher T. Elliott
- Institute for Global Food Security, School of Biological Sciences, Queen’s University Belfast, Belfast, United Kingdom
| | - Rudolf Krska
- Center for Analytical Chemistry, Department of Agrobiotechnology (IFA-Tulln), University of Natural Resources and Life Sciences, Vienna (BOKU), Tulln, Austria
- Institute for Global Food Security, School of Biological Sciences, Queen’s University Belfast, Belfast, United Kingdom
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Wang J, Li M, Wang J, Liu M, Yang K, Zhang J, Fan M, Wei X. Antibiotic Resistance of Coagulase-Negative Staphylococci and Lactic Acid Bacteria Isolated from Naturally Fermented Chinese Cured Beef. J Food Prot 2018; 81:2054-2063. [PMID: 30485765 DOI: 10.4315/0362-028x.jfp-18-195] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
This study provided phenotypic and molecular analysis of the antibiotic resistance within coagulase-negative staphylococci and lactic acid bacteria isolated from naturally fermented Chinese cured beef. A total of 49 strains were isolated by selective medium and identified at the species level by 16S rRNA gene sequencing as follows: Staphylococcus carnosus (37), Lactobacillus plantarum (6), Weissella confusa (4), Lactobacillus sakei (1), and Weissella cibaria (1). All strains were typed by random amplified polymorphic DNA fingerprinting, and their antibiotic resistances profiles to 15 antibiotics were determined as the MIC by using the agar dilution method. All the tested strains were sensitive to ampicillin, and most of them were also sensitive to penicillin, gentamycin, neomycin, norfloxacin, and ciprofloxacin with low MICs. High resistance to streptomycin, vancomycin, erythromycin, roxithromycin, lincomycin, and kanamycin was widely observed, while the resistant levels to tetracycline, oxytetracycline, and chloramphenicol varied. The presence of corresponding resistance genes in resistant isolates was investigated by PCR, with the following genes detected: tet(M) gene in 9 S. carnosus strains and 1 W. confusa strain; erm(F) gene in 10 S. carnosus strains; ere(A) gene in 6 S. carnosus strains; ere(A) gene in 4 S. carnosus strains and 1 L. plantarum strain; and str(A) gene and str(B) gene in 3 S. carnosus strains. The results indicated that multiple antibiotic resistances were common in coagulase-negative staphylococci and lactic acid bacteria strains isolated from naturally fermented Chinese cured beef. Safety analysis and risk assessment should be performed for application in meat products.
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Affiliation(s)
- Jing Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China
| | - Mingyue Li
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China
| | - Jing Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China
| | - Miaomiao Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China
| | - Kun Yang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China
| | - Jie Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China
| | - Mingtao Fan
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China
| | - Xinyuan Wei
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China
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19
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Mekadim C, Killer J, Pechar R, Mrázek J. Fragment of the aspartyl-tRNA synthetase applicable as a shared classification and phylogenetic marker in particular representatives of the order Lactobacillales. Folia Microbiol (Praha) 2018; 64:113-120. [PMID: 30094534 DOI: 10.1007/s12223-018-0638-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 08/06/2018] [Indexed: 12/23/2022]
Abstract
The order Lactobacillales represents a morphologically, metabolically, and physiologically diverse group of bacteria. Lactic acid bacteria represent the core of this phylogenetic group. They are a part of epiphytic microflora, fermented dairy, meat, fruit and vegetable products, and the digestive tract of humans and animals. Despite the fact that these bacteria form a phenotypically and genotypically heterogeneous group, their phylogenetic relationship enables to propose a common genetic marker usable in classification, typing, and phylogeny. By creation of consensus sequence based on available genomic sequences of some representatives of order Lactobacillales, a specific primer-pair binding variable region of aspS gene (length of 615 nts) encoding the aspartyl-tRNA synthetase was designed. This gene has not yet been used in classification and phylogeny of the order Lactobacillales, although it meets the requirements of molecular markers (distribution and single copy in bacterial genomes, functional constancy and genetic stability, sequence variability among taxonomic units, irreplaceable role in proteosynthesis). Primers were applied on 54 type and wild Lactobacillales strains. Obtained sequences allowed to provide alignments for purpose of phylogenetic tree reconstructions that uncovered particular phylogenetic clusters of vagococci/enterococci, obligately homofermentative and heterofermentative lactobacilli. Although a relatively short fragment of the aspS gene (approximately 33% of the complete gene sequence) was evaluated, much higher sequence variability (61.8% of pairwise identity) among strains examined compared with 16S rRNA gene (90.7%, length of 1318 nt) provides a relatively simple and effective tool for classification and typing of selected representatives of the order Lactobacillales.
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Affiliation(s)
- Chahrazed Mekadim
- Institute of Animal Physiology and Genetics, v.v.i., of the Czech Academy of Sciences, Vídeňská 1083, Prague 4 - Krč, 142 20, Czechia.,Faculty of Agrobiology, Food and Natural Resources, Department of Microbiology, Nutrition and Dietetics, Czech University of Life Sciences, Kamýcká 129, Prague 6 - Suchdol, 165 00, Czechia
| | - Jiří Killer
- Institute of Animal Physiology and Genetics, v.v.i., of the Czech Academy of Sciences, Vídeňská 1083, Prague 4 - Krč, 142 20, Czechia. .,Faculty of Agrobiology, Food and Natural Resources, Department of Microbiology, Nutrition and Dietetics, Czech University of Life Sciences, Kamýcká 129, Prague 6 - Suchdol, 165 00, Czechia.
| | - Radko Pechar
- Faculty of Agrobiology, Food and Natural Resources, Department of Microbiology, Nutrition and Dietetics, Czech University of Life Sciences, Kamýcká 129, Prague 6 - Suchdol, 165 00, Czechia.,Food Research Institute Prague, Radiová 1285/7, Prague 10 - Hostivař, 102 00, Czechia
| | - Jakub Mrázek
- Institute of Animal Physiology and Genetics, v.v.i., of the Czech Academy of Sciences, Vídeňská 1083, Prague 4 - Krč, 142 20, Czechia
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20
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Screening and molecular identification of potential probiotic lactic acid bacteria in effluents generated during ogi production. ANN MICROBIOL 2018. [DOI: 10.1007/s13213-018-1348-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022] Open
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21
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Adesulu-Dahunsi A, Sanni A, Jeyaram K, Ojediran J, Ogunsakin A, Banwo K. Extracellular polysaccharide from Weissella confusa OF126: Production, optimization, and characterization. Int J Biol Macromol 2018; 111:514-525. [DOI: 10.1016/j.ijbiomac.2018.01.060] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 12/19/2017] [Accepted: 01/09/2018] [Indexed: 12/17/2022]
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22
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Traditional processing impacts mycotoxin levels and nutritional value of ogi – A maize-based complementary food. Food Control 2018. [DOI: 10.1016/j.foodcont.2017.11.021] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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23
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Succession sequence of lactic acid bacteria driven by environmental factors and substrates throughout the brewing process of Shanxi aged vinegar. Appl Microbiol Biotechnol 2018; 102:2645-2658. [PMID: 29430584 DOI: 10.1007/s00253-017-8733-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 12/02/2017] [Accepted: 12/11/2017] [Indexed: 10/18/2022]
Abstract
Lactic acid bacteria (LAB) are essential microbiota for the fermentation and flavor formation of Shanxi aged vinegar, a famous Chinese traditional cereal vinegar that is manufactured using open solid-state fermentation (SSF) technology. However, the dynamics of LAB in this SSF process and the underlying mechanism remain poorly understood. Here, the diversity of LAB and the potential driving factors of the entire process were analyzed by combining culture-independent and culture-dependent methods. Canonical correlation analysis indicated that ethanol, acetic acid, and temperature that result from the metabolism of microorganisms serve as potential driving factors for LAB succession. LAB strains were periodically isolated, and the characteristics of 57 isolates on environmental factor tolerance and substrate utilization were analyzed to understand the succession sequence. The environmental tolerance of LAB from different stages was in accordance with their fermentation conditions. Remarkable correlations were identified between LAB growth and environmental factors with 0.866 of ethanol (70 g/L), 0.756 of acetic acid (10 g/L), and 0.803 of temperature (47 °C). More gentle or harsh environments (less or more than 60 or 80 g/L of ethanol, 5 or 20 g/L of acetic acid, and 30 or 55 °C temperature) did not affect the LAB succession. The utilization capability evaluation of the 57 isolates for 95 compounds proved that strains from different fermentation stages exhibited different predilections on substrates to contribute to the fermentation at different stages. Results demonstrated that LAB succession in the SSF process was driven by the capabilities of environmental tolerance and substrate utilization.
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24
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Adesulu-Dahunsi A, Sanni A, Jeyaram K, Banwo K. Genetic diversity of Lactobacillus plantarum strains from some indigenous fermented foods in Nigeria. Lebensm Wiss Technol 2017. [DOI: 10.1016/j.lwt.2017.04.055] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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25
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Nasrabadi Z, Ranjbar R, Poorali F, Sarshar M. Detection of eight foodborne bacterial pathogens by oligonucleotide array hybridization. Electron Physician 2017; 9:4405-4411. [PMID: 28713514 PMCID: PMC5498707 DOI: 10.19082/4405] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 02/10/2017] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Simultaneous and rapid detection of multiple foodborne bacterial pathogens is important for the prevention of foodborne illnesses. OBJECTIVE The aim of this study was to evaluate the use of 16S rDNA and 23S rDNA sequences as targets for simultaneous detection of eight foodborne bacterial pathogens. METHODS Nineteen bacterial oligonucleotide probes were synthesized and applied to nylon membranes. Digoxygenin labeled 16S rDNA and 23S rDNA from bacteria were amplified by PCR using universal primers, and the amplicons were hybridized to the membrane array. Hybridization signals were visualized by NBT/BCIP color development. RESULTS The eight intestinal bacterial pathogens including Salmonella enterica, Escherichia coli, Bacillus cereus, Vibrio cholerae, Shigella dysenteriae, Staphylococcus aureus, Listeria monocytogenes, and Enterococcus faecalis were appropriately detected in a panel of oligonucleotide array hybridization. The experimental results showed that the method could discriminate the bacterial pathogens successfully. The sensitivity of oligonucleotide array was 103 CFU/ml. CONCLUSION This study showed that 16S rDNA and 23S rDNA genes had sufficient sequence diversity for species identification and were useful for monitoring the populations of foodborne pathogenic bacteria. Furthermore, results obtained in this study revealed that oligonucleotide array hybridization had a powerful capability to detect and identify the bacterial pathogens simultaneously.
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Affiliation(s)
- Zohreh Nasrabadi
- Department of Microbiology, Faculty of Science, Islamic Azad University, Karaj branch, Karaj, Iran
| | - Reza Ranjbar
- Molecular Biology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Fatemeh Poorali
- Molecular Biology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Meysam Sarshar
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Laboratory affiliated to Institute Pasteur Italia-Fondazione Cenci Bolognetti, Rome, Italy
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26
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Adesulu-Dahunsi A, Sanni A, Jeyaram K. Rapid differentiation among Lactobacillus, Pediococcus and Weissella species from some Nigerian indigenous fermented foods. Lebensm Wiss Technol 2017. [DOI: 10.1016/j.lwt.2016.11.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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27
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Moon GS, Narbad A. Monitoring of Bioluminescent Lactobacillus plantarum in a Complex Food Matrix. Korean J Food Sci Anim Resour 2017; 37:147-152. [PMID: 28316482 PMCID: PMC5355579 DOI: 10.5851/kosfa.2017.37.1.147] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 02/08/2017] [Accepted: 02/14/2017] [Indexed: 11/06/2022] Open
Abstract
A bioluminescent Lactobacillus plantarum (pLuc2) strain was constructed. The luminescent signal started to increase during the early exponential phase and reached its maximum in the mid-exponential phase in a batch culture of the strain. The signal detection sensitivity of the strain was the highest in PBS (phosphate buffered saline), followed by milk and MRS broth, indicating that the sensitivity was influenced by the matrix effect. The strain was used in millet seed fermentation which has a complex matrix and native lactic acid bacteria (LAB). The luminescent signal was gradually increased until 9 h during fermentation and abolished at 24 h, indicating that the strain could be specifically tracked in the complex matrix and microflora. Therefore, the bioluminescent labeling system can be used for monitoring LAB in food and dairy sciences and industries.
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Affiliation(s)
- Gi-Seong Moon
- Department of Biotechnology, Korea National University of Transportation, Jeungpyeong 27909, Korea
| | - Arjan Narbad
- Gut Health and Food Safety Programme, Institute of Food Research, Norwich NR4 7UA, UK
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28
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Screening and molecular identification of lactic acid bacteria from gari and fufu and gari effluents. ANN MICROBIOL 2016. [DOI: 10.1007/s13213-016-1243-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
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29
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Gabaza M, Muchuweti M, Vandamme P, Raes K. Can fermentation be used as a sustainable strategy to reduce iron and zinc binders in traditional African fermented cereal porridges or gruels? FOOD REVIEWS INTERNATIONAL 2016. [DOI: 10.1080/87559129.2016.1196491] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Molly Gabaza
- Department of Biochemistry, Faculty of Science, University of Zimbabwe, Harare, Zimbabwe
- Department of Biochemistry and Microbiology, Faculty of Science, Ghent University, Gent, Belgium
- Department of Industrial Biological Sciences, Faculty of Bioscience Engineering, Ghent University, Kortrijk, Belgium
| | - Maud Muchuweti
- Department of Biochemistry, Faculty of Science, University of Zimbabwe, Harare, Zimbabwe
| | - Peter Vandamme
- Department of Biochemistry and Microbiology, Faculty of Science, Ghent University, Gent, Belgium
| | - Katleen Raes
- Department of Industrial Biological Sciences, Faculty of Bioscience Engineering, Ghent University, Kortrijk, Belgium
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Zaets IY, Podolich OV, Reva ON, Kozyrovska NO. DNA metabarcoding of microbial communities for healthcare. ACTA ACUST UNITED AC 2016. [DOI: 10.7124/bc.000906] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- I. Ye. Zaets
- Institute of Molecular Biology and Genetics, NAS of Ukraine
| | - O. V. Podolich
- Institute of Molecular Biology and Genetics, NAS of Ukraine
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Ghazi F, Kihal M, Altay N, Gürakan GC. Comparison of RAPD-PCR and PFGE analysis for the typing of Streptococcus thermophilus strains isolated from traditional Turkish yogurts. ANN MICROBIOL 2015. [DOI: 10.1007/s13213-015-1185-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Okeke CA, Ezekiel CN, Nwangburuka CC, Sulyok M, Ezeamagu CO, Adeleke RA, Dike SK, Krska R. Bacterial Diversity and Mycotoxin Reduction During Maize Fermentation (Steeping) for Ogi Production. Front Microbiol 2015; 6:1402. [PMID: 26697001 PMCID: PMC4678208 DOI: 10.3389/fmicb.2015.01402] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Accepted: 11/24/2015] [Indexed: 11/16/2022] Open
Abstract
Bacterial diversity and community structure of two maize varieties (white and yellow) during fermentation/steeping for ogi production, and the influence of spontaneous fermentation on mycotoxin reduction in the gruel were studied. A total of 142 bacterial isolates obtained at 24-96 h intervals were preliminarily identified by conventional microbiological methods while 60 selected isolates were clustered into 39 OTUs consisting of 15 species, 10 genera, and 3 phyla by 16S rRNA sequence analysis. Lactic acid bacteria constituted about 63% of all isolated bacteria and the genus Pediococcus dominated (white maize = 84.8%; yellow maize = 74.4%). Pediococcus acidilactici and Lactobacillus paraplantarum were found at all steeping intervals of white and yellow maize, respectively, while P. claussenii was present only at the climax stage of steeping white maize. In both maize varieties, P. pentosaceus was found at 24-72 h. Mycotoxin concentrations (μg/kg) in the unsteeped grains were: white maize (aflatoxin B1 = 0.60; citrinin = 85.8; cyclopiazonic acid = 23.5; fumonisins (B1/B2/B3) = 68.4-483; zearalenone = 3.3) and yellow maize (aflatoxins (B1/B2/M1) = 22.7-513; citrinin = 16,800; cyclopiazonic acid = 247; fumonisins (B1/B2/B3) = 252-1,586; zearalenone = 205). Mycotoxins in both maize varieties were significantly (p < 0.05) reduced across steeping periods. This study reports for the first time: (a) the association of L. paraplantarum, P. acidilactici, and P. claussenii with ogi production from maize, (b) citrinin occurrence in Nigerian maize and ogi, and
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Affiliation(s)
- Chiamaka A. Okeke
- Department of Biosciences and Biotechnology, Babcock UniversityIlishan Remo, Nigeria
| | - Chibundu N. Ezekiel
- Department of Biosciences and Biotechnology, Babcock UniversityIlishan Remo, Nigeria
| | - Cyril C. Nwangburuka
- Microbiology and Environmental Biotechnology Research Group, Agricultural Research Council–Institute for Soil, Climate and WaterPretoria, South Africa
- Department of Agriculture, Babcock UniversityIlishan Remo, Nigeria
| | - Michael Sulyok
- Center for Analytical Chemistry, Department of Agrobiotechnology (IFA-Tulln), University of Natural Resources and Life Sciences ViennaTulln, Austria
| | - Cajethan O. Ezeamagu
- Department of Biosciences and Biotechnology, Babcock UniversityIlishan Remo, Nigeria
| | - Rasheed A. Adeleke
- Microbiology and Environmental Biotechnology Research Group, Agricultural Research Council–Institute for Soil, Climate and WaterPretoria, South Africa
- Unit for Environmental Science and Management, North-West University at PotchefstroomPotchefstroom, South Africa
| | - Stanley K. Dike
- Department of Microbiology, Imo State UniversityOwerri, Nigeria
| | - Rudolf Krska
- Center for Analytical Chemistry, Department of Agrobiotechnology (IFA-Tulln), University of Natural Resources and Life Sciences ViennaTulln, Austria
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Reva ON, Zaets IE, Ovcharenko LP, Kukharenko OE, Shpylova SP, Podolich OV, de Vera JP, Kozyrovska NO. Metabarcoding of the kombucha microbial community grown in different microenvironments. AMB Express 2015; 5:124. [PMID: 26061774 PMCID: PMC4467805 DOI: 10.1186/s13568-015-0124-5] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Accepted: 05/28/2015] [Indexed: 11/28/2022] Open
Abstract
Introducing of the DNA metabarcoding analysis of probiotic microbial communities allowed getting insight into their functioning and establishing a better control on safety and efficacy of the probiotic communities. In this work the kombucha poly-microbial probiotic community was analysed to study its flexibility under different growth conditions. Environmental DNA sequencing revealed a complex and flexible composition of the kombucha microbial culture (KMC) constituting more bacterial and fungal organisms in addition to those found by cultural method. The community comprised bacterial and yeast components including cultured and uncultivable microorganisms. Culturing the KMC under different conditions revealed the core part of the community which included acetobacteria of two genera Komagataeibacter (former Gluconacetobacter) and Gluconobacter, and representatives of several yeast genera among which Brettanomyces/Dekkera and Pichia (including former Issatchenkia) were dominant. Herbaspirillum spp. and Halomonas spp., which previously had not been described in KMC, were found to be minor but permanent members of the community. The community composition was dependent on the growth conditions. The bacterial component of KMC was relatively stable, but may include additional member—lactobacilli. The yeast species composition was significantly variable. High-throughput sequencing showed complexity and variability of KMC that may affect the quality of the probiotic drink. It was hypothesized that the kombucha core community might recruit some environmental bacteria, particularly lactobacilli, which potentially may contribute to the fermentative capacity of the probiotic drink. As many KMC-associated microorganisms cannot be cultured out of the community, a robust control for community composition should be provided by using DNA metabarcoding.
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Metagenomic analysis of the bacterial microbiota linked to the traditional Algerian date product “Btana”. ANN MICROBIOL 2015. [DOI: 10.1007/s13213-015-1084-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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35
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Multifunctional properties of Lactobacillus plantarum strains isolated from fermented cereal foods. J Funct Foods 2015. [DOI: 10.1016/j.jff.2015.06.022] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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Physicochemical and microbiological characterization of chicha, a rice-based fermented beverage produced by Umutina Brazilian Amerindians. Food Microbiol 2015; 46:210-217. [DOI: 10.1016/j.fm.2014.08.009] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 08/08/2014] [Accepted: 08/11/2014] [Indexed: 12/22/2022]
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37
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A large diversity of lactic acid bacteria species is involved in the fermentation of wheat used for the manufacture of lemzeiet. Eur Food Res Technol 2015. [DOI: 10.1007/s00217-015-2442-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Franz CM, Huch M, Mathara JM, Abriouel H, Benomar N, Reid G, Galvez A, Holzapfel WH. African fermented foods and probiotics. Int J Food Microbiol 2014; 190:84-96. [DOI: 10.1016/j.ijfoodmicro.2014.08.033] [Citation(s) in RCA: 141] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 06/25/2014] [Accepted: 08/23/2014] [Indexed: 12/24/2022]
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Soro-Yao AA, Schumann P, Thonart P, Djè KM, Pukall R. The Use of MALDI-TOF Mass Spectrometry, Ribotyping and Phenotypic Tests to Identify Lactic Acid Bacteria from Fermented Cereal Foods in Abidjan (Côte d'Ivoire). Open Microbiol J 2014; 8:78-86. [PMID: 25279017 PMCID: PMC4181171 DOI: 10.2174/1874285801408010078] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 07/18/2014] [Accepted: 07/23/2014] [Indexed: 11/22/2022] Open
Abstract
Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) protein analysis, automated ribotyping, and phenotypic tests (e.g., cell morphology, gas production from glucose, growth and acid production on homofermemtative-heterofermentative differential (HHD) agar medium, sugar fermentation patterns) were used to identify 23 lactic acid bacteria (LAB) isolated from fermented cereal foods available in Abidjan, Côte d'Ivoire. Pediococcus acidilactici (56.5%), Lactobacillus fermentum (30.4%), L. salivarius (4.3%), P. pentosaceus (4.3%) and L. plantarum subsp. plantarum (4.3%) were the species and subspecies identified. Protein based identification was confirmed by automated ribotyping for selected isolates and was similar to that provided by the phenotypic characterization. MALDI-TOF MS protein analysis provided a high level of discrimination among the isolates and could be used for the rapid screening of LAB starter cultures.
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Affiliation(s)
- Amenan A Soro-Yao
- Food Science and Technology Unit, Nangui Abrogoua University, 02 BP 801 Abidjan 02, Côte d’Ivoire
| | - Peter Schumann
- Leibniz-Institute DSMZ-German Collection of Microorganisms and Cell Cultures, 38124 Braunschweig, Germany
| | - Philippe Thonart
- Wallon Center for Industrial Microbiology (CWBI), University of Liège, Bld du Rectorat 29-B40, B 4000 Liège, Belgium
- Wallon Center of Industrial Biology, Bio-industry Unit, Gembloux Agro-BioTech, 5030 Gembloux, Belgium
| | - Koffi M Djè
- Food Science and Technology Unit, Nangui Abrogoua University, 02 BP 801 Abidjan 02, Côte d’Ivoire
| | - Rüdiger Pukall
- Leibniz-Institute DSMZ-German Collection of Microorganisms and Cell Cultures, 38124 Braunschweig, Germany
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Galati A, Oguntoyinbo FA, Moschetti G, Crescimanno M, Settanni L. The Cereal Market and the Role of Fermentation in Cereal-Based Food Production in Africa. FOOD REVIEWS INTERNATIONAL 2014. [DOI: 10.1080/87559129.2014.929143] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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41
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Humblot C, Turpin W, Chevalier F, Picq C, Rochette I, Guyot JP. Determination of expression and activity of genes involved in starch metabolism in Lactobacillus plantarum A6 during fermentation of a cereal-based gruel. Int J Food Microbiol 2014; 185:103-11. [PMID: 24950021 DOI: 10.1016/j.ijfoodmicro.2014.05.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Revised: 05/06/2014] [Accepted: 05/10/2014] [Indexed: 10/25/2022]
Abstract
Traditional fermented gruels prepared from cereals are widely used for complementary feeding of young children in Africa and usually have a low energy density. The amylase activity of some lactic acid bacteria (LAB) helps increase the energy content of gruels through partial hydrolysis of starch, thus enabling the incorporation of more starchy material while conserving the desired semi-liquid consistency for young children. Even if this ability is mainly related to the production of alpha-amylase (E.C. 3.2.1.1), in a recent molecular screening, genes coding for enzymes involved in starch metabolism were detected in the efficient amylolytic LAB Lactobacillus plantarum A6: alpha-glucosidase (E.C. 3.2.1.20), neopullulanase (E.C. 3.2.1.135), amylopectin phosphorylase (E.C. 2.4.1.1) and maltose phosphorylase (E.C. 2.4.1.8). The objective of this study was to investigate the expression of these genes in a model of starchy fermented food made from pearl millet (Pennisetum glaucum). Transcriptional and enzymatic analyses were performed during the 18-h fermentation period. Liquefaction was mainly caused by an extracellular alpha amylase encoded by the amyA gene specific to the A6 strain among L. plantarum species and found in both Lactobacillus amylovorus and Lactobacillus manihotivorans. The second most active enzyme was neopullulanase. Other starch metabolizing enzymes were less often detected. The dynamic detection of transcripts of gene during starch fermentation in pearl millet porridge suggests that the set of genes we investigated was not expressed continuously but transiently.
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Affiliation(s)
- Christèle Humblot
- IRD, UMR Nutripass IRD/Montpellier2/Montpellier1, F-34394 Montpellier, France.
| | - Williams Turpin
- IRD, UMR Nutripass IRD/Montpellier2/Montpellier1, F-34394 Montpellier, France
| | - François Chevalier
- IRD, UMR Nutripass IRD/Montpellier2/Montpellier1, F-34394 Montpellier, France
| | - Christian Picq
- IRD, UMR Nutripass IRD/Montpellier2/Montpellier1, F-34394 Montpellier, France
| | - Isabelle Rochette
- IRD, UMR Nutripass IRD/Montpellier2/Montpellier1, F-34394 Montpellier, France
| | - Jean-Pierre Guyot
- IRD, UMR Nutripass IRD/Montpellier2/Montpellier1, F-34394 Montpellier, France
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Herbel S, Lauzat B, von Nickisch-Rosenegk M, Kuhn M, Murugaiyan J, Wieler L, Guenther S. Species-specific quantification of probiotic lactobacilli in yoghurt by quantitative real-time PCR. J Appl Microbiol 2013; 115:1402-10. [DOI: 10.1111/jam.12341] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 08/19/2013] [Accepted: 09/04/2013] [Indexed: 11/29/2022]
Affiliation(s)
- S.R. Herbel
- Institute of Microbiology and Epizootics; Freie Universität Berlin; Berlin Germany
- Department of Biology, Chemistry, Pharmacy; Freie Universität Berlin; Berlin Germany
| | - B. Lauzat
- Institute of Microbiology and Epizootics; Freie Universität Berlin; Berlin Germany
| | | | - M. Kuhn
- CONGEN Biotechnologie GmbH; Berlin Germany
| | - J. Murugaiyan
- Institute of Animal and Environmental Hygiene; Freie Universität Berlin; Berlin Germany
| | - L.H. Wieler
- Institute of Microbiology and Epizootics; Freie Universität Berlin; Berlin Germany
| | - S. Guenther
- Institute of Microbiology and Epizootics; Freie Universität Berlin; Berlin Germany
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Balciunas EM, Castillo Martinez FA, Todorov SD, Franco BDGDM, Converti A, Oliveira RPDS. Novel biotechnological applications of bacteriocins: A review. Food Control 2013. [DOI: 10.1016/j.foodcont.2012.11.025] [Citation(s) in RCA: 221] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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44
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Mukisa IM, Porcellato D, Byaruhanga YB, Muyanja CMBK, Rudi K, Langsrud T, Narvhus JA. The dominant microbial community associated with fermentation of Obushera (sorghum and millet beverages) determined by culture-dependent and culture-independent methods. Int J Food Microbiol 2012; 160:1-10. [PMID: 23141639 DOI: 10.1016/j.ijfoodmicro.2012.09.023] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 09/26/2012] [Accepted: 09/30/2012] [Indexed: 10/27/2022]
Abstract
Obushera includes four fermented cereal beverages from Uganda namely: Obutoko, Enturire, Ekitiribita and Obuteire, whose microbial diversity has not hitherto been fully investigated. Knowledge of the microbial diversity and dynamics in these products is crucial for understanding their safety and development of appropriate starter cultures for controlled industrial processing. Culture-dependent and culture-independent techniques including denaturating gradient gel electrophoresis (DGGE) and mixed DNA sequencing of polymerase chain reaction (PCR) amplified ribosomal RNA genes were used to study the bacteria and yeast diversity of Obushera. The pH dropped from 6.0-4.6 to 3.5-4.0 within 1-2 days for Obutoko, Enturire and Obuteire whereas that of Ekitiribita decreased to 4.4 after 4 days. Counts of lactic acid bacteria (LAB) increased from 5.0 to 11.0 log cfug(-1) and yeasts increased from 3.4 to 7.1 log cfug(-1) while coliform counts decreased from 2.0 to <1 log cfug(-1) during four days of fermentation. LAB and yeast isolates were identified by rRNA gene sequence analysis. LAB isolates included: Enterococcus spp., Lactobacillus (Lb.) plantarum, Lb. fermentum, Lb. delbrueckii, Lactococcus lactis, Leuconostoc lactis, Streptococcus (S.) infantarius subsp. infantarius, Pediococcus pentosaceus and Weisella (W.) confusa. DGGE indicated predominance of S. gallolyticus, S. infantarius subsp. infantarius, Lb. fermentum, Lb. delbrueckii, W. confusa, Lb. reuteri, Fructobacillus spp., L. lactis and L. lactis. Yeast isolates included Clavispora lusitaniae, Cyberlindnera fabianii, Issatchenkia orientalis and Saccharomyces cerevisiae. DGGE indicated predominance of S. cerevisiae in Obutoko, Enturire and Obuteire and also detected Pichia spp. and I. orientalis in Obutoko. Obushera produced in the laboratory was initially dominated by Enterobacteriaceae and later by Lactococcus spp. Enterobacteriaceae and Bacillus spp. were also detected in Ekitiribita. Development of starters for Obushera may require combinations of LAB and S. cerevisiae for Obutoko, Enturire and Obuteire and LAB for Ekitiribita.
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Affiliation(s)
- Ivan M Mukisa
- Department of Chemistry, Biotechnology and Food Science (IKBM), Norwegian University of Life Sciences (UMB) P.O.Box 5003, NO-1432 Ås, Norway
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