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Contessa CR, Moreira EC, Moraes CC, de Medeiros Burkert JF. Production and SERS characterization of bacteriocin-like inhibitory substances by latilactobacillus sakei in whey permeate powder: exploring natural antibacterial potential. Bioprocess Biosyst Eng 2024:10.1007/s00449-024-03065-6. [PMID: 39014172 DOI: 10.1007/s00449-024-03065-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 07/10/2024] [Indexed: 07/18/2024]
Abstract
Bacteriocins are antimicrobial compounds that have awakened interest across several industries due to their effectiveness. However, their large-scale production often becomes unfeasible on an industrial scale, primarily because of high process costs. Addressing this challenge, this work analyzes the potential of using low-cost whey permeate powder, without any supplementation, to produce bacteriocin-like inhibitory substances (BLIS) through the fermentation of Latilactobacillus sakei. For this purpose, different concentrations of whey permeate powder (55.15 gL-1, 41.3 gL-1 and 27.5 gL-1) were used. The ability of L. sakei to produce BLIS was evaluated, as well as the potential of crude cell-free supernatant to act as a preservative. Raman spectroscopy and surface-enhanced Raman scattering (SERS) provided detailed insights into the composition and changes occurring during fermentation. SERS, in particular, enhanced peak definition significantly, allowing for the identification of key components, such as lactose, proteins, and phenylalanine, which are crucial in understanding the fermentation process and BLIS characteristics. The results revealed that the concentration of 55.15 gL-1 of whey permeate powder, in flasks without agitation and a culture temperature of 32.5 °C, presented the highest biological activity of BLIS, reaching 99% of inhibition of Escherichia coli and Staphylococcus aureus with minimum inhibitory concentration of 36-45%, respectively. BLIS production began within 60 h of cultivation and was associated with class II bacteriocins. The results demonstrate a promising approach for producing BLIS in an economical and environmentally sustainable manner, with potential implications for various industries.
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Affiliation(s)
- Camila Ramão Contessa
- Engineering and Science of Food Graduate Program, College of Chemistry and Food Engineering, Laboratory Bioprocess Engineering, Federal University of Rio Grande, PO Box 474, Rio Grande, RS, 96203-900, Brazil.
| | - Eduardo Ceretta Moreira
- Science and Engineering of Materials Graduate Program, Spectroscopy Laboratory, Federal University of Pampa, PO Box 1650, Bagé, RS, 96413170, Brazil
| | - Caroline Costa Moraes
- Science and Engineering of Materials Graduate Program, Laboratory of Microbiology and Food Toxicology, Federal University of Pampa, PO Box 1650, Bagé, RS, 96413170, Brazil
| | - Janaína Fernandes de Medeiros Burkert
- Engineering and Science of Food Graduate Program, College of Chemistry and Food Engineering, Laboratory Bioprocess Engineering, Federal University of Rio Grande, PO Box 474, Rio Grande, RS, 96203-900, Brazil
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Mullally CA, Fahriani M, Mowlaboccus S, Coombs GW. Non- faecium non- faecalis enterococci: a review of clinical manifestations, virulence factors, and antimicrobial resistance. Clin Microbiol Rev 2024; 37:e0012123. [PMID: 38466110 PMCID: PMC11237509 DOI: 10.1128/cmr.00121-23] [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] [Indexed: 03/12/2024] Open
Abstract
SUMMARYEnterococci are a diverse group of Gram-positive bacteria that are typically found as commensals in humans, animals, and the environment. Occasionally, they may cause clinically relevant diseases such as endocarditis, septicemia, urinary tract infections, and wound infections. The majority of clinical infections in humans are caused by two species: Enterococcus faecium and Enterococcus faecalis. However, there is an increasing number of clinical infections caused by non-faecium non-faecalis (NFF) enterococci. Although NFF enterococcal species are often overlooked, studies have shown that they may harbor antimicrobial resistance (AMR) genes and virulence factors that are found in E. faecium and E. faecalis. In this review, we present an overview of the NFF enterococci with a particular focus on human clinical manifestations, epidemiology, virulence genes, and AMR genes.
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Affiliation(s)
- Christopher A Mullally
- Antimicrobial Resistance and Infectious Diseases (AMRID) Research Laboratory, Murdoch University, Murdoch, Western Australia, Australia
- The Marshall Centre for Infectious Diseases Research and Training, School of Biomedical Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Marhami Fahriani
- Antimicrobial Resistance and Infectious Diseases (AMRID) Research Laboratory, Murdoch University, Murdoch, Western Australia, Australia
| | - Shakeel Mowlaboccus
- Antimicrobial Resistance and Infectious Diseases (AMRID) Research Laboratory, Murdoch University, Murdoch, Western Australia, Australia
- The Marshall Centre for Infectious Diseases Research and Training, School of Biomedical Sciences, The University of Western Australia, Perth, Western Australia, Australia
- PathWest Laboratory Medicine-WA, Department of Microbiology, Fiona Stanley Hospital, Murdoch, Western Australia, Australia
| | - Geoffrey W Coombs
- Antimicrobial Resistance and Infectious Diseases (AMRID) Research Laboratory, Murdoch University, Murdoch, Western Australia, Australia
- The Marshall Centre for Infectious Diseases Research and Training, School of Biomedical Sciences, The University of Western Australia, Perth, Western Australia, Australia
- PathWest Laboratory Medicine-WA, Department of Microbiology, Fiona Stanley Hospital, Murdoch, Western Australia, Australia
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Ghiasi SE, Gheibipour M, Motamedi H, Dar MA. Screening and evaluation of the ruminal cellulolytic bacteria and their potential application as probiotics. IRANIAN JOURNAL OF MICROBIOLOGY 2024; 16:389-400. [PMID: 39005608 PMCID: PMC11245342 DOI: 10.18502/ijm.v16i3.15796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
Background and Objectives Rumen microbiologists are looking for new probiotics to improve the digestibility of livestock diets. This study intended to screen and evaluate the ruminal cellulolytic bacteria (CBs) and their potential application as probiotics. Materials and Methods Microbial culture and molecular techniques performed to isolate CBs from the rumen of camels, deer and rams. Their antibacterial and antibiogram tests were done using disc diffusion method. Their potential to degrade cellulose, starch, tannin and protein were investigated using clear zone halo, and spectrophotometric techniques. Bilious, saline, and acidic broth media were used to study the resistance of isolates in intestinal conditions. Results The phylogenetic analysis revealed that the strains belonged to Firmicutes and Proteobacteria phyla, Citrobacter murliniae, Ornithinibacillus bavariensis, C. braakii, and Bacillus subtilis. The highest cellulase (CAS) activity was recorded by C. murliniae Dez wildlife13A (2.98 UmL-1), whereas C. braakii Loot desert 111A (1.14 Uml-1) was produced the lowest enzyme. The isolates were highly resistant to synthetic conditions of intestine (pH 2.5-3.5, bile 0.3-2%), as well as tolerated higher concentrations of NaCl (up to 10%). They effectively inhibited standard pathogen strains, and showed sensitivity to the used antibiotics. Conclusion This study reports the cellulolytic O. bavariensis Tabbas desert 32A for the first time from the rumen, which will have potential biotechnological applications.
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Affiliation(s)
- Seyyed Ehsan Ghiasi
- Department of Animal Science, Faculty of Agriculture, University of Birjand, Birjand, Iran
- Research Group of Environmental Stress in Animal Science, Faculty of Agriculture, University of Birjand, Birjand, Iran
| | - Maryam Gheibipour
- Department of Animal Science, Faculty of Agriculture, University of Birjand, Birjand, Iran
- Department of Environmental Health Engineering, Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Hossein Motamedi
- Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
- Biotechnology and Biological Science Research Center, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Mudasir A Dar
- Biofuels Institute, School of Environment & Safety Engineering, Jiangsu University, Jiangsu, China
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Gheibipour M, Ghiasi SE, Bashtani M, Torbati MBM, Motamedi H. Screening the Rumen of Balochi Camel ( Camelus dromedarius) and Cashmere Goat ( Capra hircus) to Isolate Enzyme-Producing Bacteria as Potential Additives for Animal Feed. Indian J Microbiol 2024; 64:572-582. [PMID: 39011021 PMCID: PMC11246378 DOI: 10.1007/s12088-024-01197-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 01/05/2024] [Indexed: 07/17/2024] Open
Abstract
Rumen microbiology has made a significant contribution to the discovery of biodegradation processes, which convert nutrients into energy for ruminants. Therefore, understanding the enzymatic potential in the rumen of different animal species is essential for developing efficient microbial feed additives. The aim of this study was to isolate enzyme-producing bacteria (EPBs) from the rumen of the Balochi camel (Camelus dromedarius) and Cashmere goat (Capra hircus) as potential additives for animal feed. The EPBs were screened based on the hydrolysis of carboxyl methyl cellulose, tannin, starch, and bovine serum albumin. The isolates were then subjected to enzyme activity assays and molecular characterization. Additionally, they were evaluated for their antagonistic effects, antibiotic susceptibility, and growth in acidic, bile, and saline media. Thirteen enzyme-producing strains were identified in the rumen of the camels and goats, belonging to the genera Klebsiella, Escherichia, Raoultella, Enterobacter and Pectobacterium. The highest and lowest tannase activities were recorded for Escherichia coli GHMGHE41 (10.46 Um/l-1) and Raoultella planticola GHMGHE15 (1.83 Um/l-1), respectively. Enterobacter cloacae GHMGHE18 (2.03 U/ml) was the most effective cellulolytic isolate, compared to Klebsiella strains (1.05 Um/l-1). The highest protease producer was Klebsiella pneumoniae GHMGHE13 (3.00 U/ml-1), while Escherichia coli GHMGHE17 (1.13 U/ml-1) had the lowest activity. Klebsiella pneumoniae GHMGHE13 (1.55 U/ml-1) and Enterobacter cloacae GHMGHE19 (1.26 U/ml-1) were the highest and lowest producers of amylase, respectively. The strains exhibited mixed responses to antibiotics and remained stable under stressful conditions. These findings indicate that ruminal EPBs have the potential to be used in animal feed, pending further in vivo studies.
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Affiliation(s)
- Maryam Gheibipour
- Department of Animal Science, Faculty of Agricultural, University of Birjand, Birjand, Iran
| | - Seyyed Ehsan Ghiasi
- Department of Animal Science, Faculty of Agricultural, University of Birjand, Birjand, Iran
- Research Group of Environmental Stress in Animal Science, Faculty of Agricultural, University of Birjand, Birjand, Iran
| | - Moslem Bashtani
- Department of Animal Science, Faculty of Agricultural, University of Birjand, Birjand, Iran
- Research Group of Environmental Stress in Animal Science, Faculty of Agricultural, University of Birjand, Birjand, Iran
| | - Mohammad Bagher Montazer Torbati
- Department of Animal Science, Faculty of Agricultural, University of Birjand, Birjand, Iran
- Research Group of Environmental Stress in Animal Science, Faculty of Agricultural, University of Birjand, Birjand, Iran
| | - Hossein Motamedi
- Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
- Biotechnology and Biological Science Research Center, Shahid Chamran University of Ahvaz, Ahvaz, Iran
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Muthuvelu KS, Ethiraj B, Pramnik S, Raj NK, Venkataraman S, Rajendran DS, Bharathi P, Palanisamy E, Narayanan AS, Vaidyanathan VK, Muthusamy S. Biopreservative technologies of food: an alternative to chemical preservation and recent developments. Food Sci Biotechnol 2023; 32:1337-1350. [PMID: 37457405 PMCID: PMC10348988 DOI: 10.1007/s10068-023-01336-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 04/28/2023] [Accepted: 05/08/2023] [Indexed: 07/18/2023] Open
Abstract
Despite centuries of developing strategies to prevent food-associated illnesses, food safety remains a significant concern, even with multiple technological advancements. Consumers increasingly seek less processed and naturally preserved food options. One promising approach is food biopreservation, which uses natural antimicrobials found in food with a long history of safe consumption and can help reduce the reliance on chemically synthesized food preservatives. The hurdle technology method that combines multiple antimicrobial strategies is often used to improve the effectiveness of food biopreservation. This review attempts to provide a research summary on the utilization of lactic acid bacteria, bacteriocins, endolysins, bacteriophages, and biopolymers helps in the improvement of the shelf-life of food and lower the risk of food-borne pathogens throughout the food supply chain. This review also aims to evaluate current technologies that successfully employ the aforementioned preservatives to address obstacles in food biopreservation.
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Affiliation(s)
- Kirupa Sankar Muthuvelu
- Bioprocess and Bioproducts Special Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Erode, Tamil Nadu 638 401 India
| | - Baranitharan Ethiraj
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, Tamil Nadu 600077 India
| | - Shreyasi Pramnik
- Integrated Bioprocessing Laboratory, School of Bioengineering, SRM Institute of Science and Technology (SRM IST), Kattankulathur, Tamil Nadu 603203 India
| | - N. Keerthish Raj
- Integrated Bioprocessing Laboratory, School of Bioengineering, SRM Institute of Science and Technology (SRM IST), Kattankulathur, Tamil Nadu 603203 India
| | - Swethaa Venkataraman
- Integrated Bioprocessing Laboratory, School of Bioengineering, SRM Institute of Science and Technology (SRM IST), Kattankulathur, Tamil Nadu 603203 India
| | - Devi Sri Rajendran
- Integrated Bioprocessing Laboratory, School of Bioengineering, SRM Institute of Science and Technology (SRM IST), Kattankulathur, Tamil Nadu 603203 India
| | - Priyadharshini Bharathi
- Integrated Bioprocessing Laboratory, School of Bioengineering, SRM Institute of Science and Technology (SRM IST), Kattankulathur, Tamil Nadu 603203 India
| | - Elakiya Palanisamy
- Bioprocess and Bioproducts Special Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Erode, Tamil Nadu 638 401 India
| | - Anusri Sathiya Narayanan
- Bioprocess and Bioproducts Special Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Erode, Tamil Nadu 638 401 India
| | - Vinoth Kumar Vaidyanathan
- Integrated Bioprocessing Laboratory, School of Bioengineering, SRM Institute of Science and Technology (SRM IST), Kattankulathur, Tamil Nadu 603203 India
| | - Shanmugaprakash Muthusamy
- Downstream Processing Laboratory, Department of Biotechnology, Kumaraguru College of Technology, Coimbatore, India
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Bao J, Ge G, Wang Z, Xiao Y, Zhao M, Sun L, Wang Y, Zhang J, Jia Y, Du S. Effect of isolated lactic acid bacteria on the quality and bacterial diversity of native grass silage. FRONTIERS IN PLANT SCIENCE 2023; 14:1160369. [PMID: 37484462 PMCID: PMC10358727 DOI: 10.3389/fpls.2023.1160369] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 06/02/2023] [Indexed: 07/25/2023]
Abstract
Objective The objective of this study was to isolate lactic acid bacteria (LAB) from native grasses and naturally fermented silages, determine their identity, and assess their effects on silage quality and bacterial communities of the native grasses of three steppe types fermented for 60 days. Methods Among the 58 isolated LAB strains, Limosilactobacillus fermentum (BL1) and Latilactobacillus graminis (BL5) were identified using 16S rRNA sequences. Both strains showed normal growth at 15- 45°C temperature, 3-6.5% NaCl concentration, and pH 4-9. Two isolated LAB strains (labeled L1 and L5) and two commercial additives (Lactiplantibacillus plantarum and Lentilactobacillus buchneri; designated as LP and LB, respectively) were added individually to native grasses of three steppe types (meadow steppe, MS; typical steppe, TS; desert steppe, DS), and measured after 60 d of fermentation. The fresh material (FM) of different steppe types was treated with LAB (1 × 105 colony forming units/g fresh weight) or distilled water (control treatment [CK]). Results Compared with CK, the LAB treatment showed favorable effects on all three steppe types, i.e., reduced pH and increased water-soluble carbohydrate content, by modulating the microbiota. The lowest pH was found in the L5 treatment of three steppe types, at the same time, the markedly (p < 0.05) elevated acetic acid (AA) concentration was detected in the L1 and LB treatment. The composition of bacterial community in native grass silage shifted from Pantoea agglomerans and Rosenbergiella nectarea to Lentilactobacillus buchneri at the species level. The abundance of Lentilactobacillus buchneri and Lactiplantibacillus plantarum increased significantly in L1, L5, LP, and LB treatments, respectively, compared with CK (p < 0.05). Conclusion In summary, the addition of LAB led to the shifted of microbiota and modified the quality of silage, and L. fermentum and L. graminis improved the performance of native grass silage.
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Affiliation(s)
- Jian Bao
- Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization of Ministry of Agriculture and Rural Affairs, Key Laboratory of Grassland Resources of the Ministry of Education, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot, China
| | - Gentu Ge
- Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization of Ministry of Agriculture and Rural Affairs, Key Laboratory of Grassland Resources of the Ministry of Education, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot, China
| | - Zhijun Wang
- Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization of Ministry of Agriculture and Rural Affairs, Key Laboratory of Grassland Resources of the Ministry of Education, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot, China
| | - Yanzi Xiao
- College of Agriculture and Forestry, Hulunbuir University, Hulunbuir, China
| | - Muqier Zhao
- Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization of Ministry of Agriculture and Rural Affairs, Key Laboratory of Grassland Resources of the Ministry of Education, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot, China
| | - Lin Sun
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Grassland Research Institute, Hohhot, China
| | - Yu Wang
- Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization of Ministry of Agriculture and Rural Affairs, Key Laboratory of Grassland Resources of the Ministry of Education, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot, China
| | - Jiawei Zhang
- Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization of Ministry of Agriculture and Rural Affairs, Key Laboratory of Grassland Resources of the Ministry of Education, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot, China
| | - Yushan Jia
- Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization of Ministry of Agriculture and Rural Affairs, Key Laboratory of Grassland Resources of the Ministry of Education, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot, China
| | - Shuai Du
- Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization of Ministry of Agriculture and Rural Affairs, Key Laboratory of Grassland Resources of the Ministry of Education, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot, China
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Wei L, Zeng B, Zhang S, Guo W, Li F, Zhao J, Li Y. Hybridization altered the gut microbiota of pigs. Front Microbiol 2023; 14:1177947. [PMID: 37465027 PMCID: PMC10350513 DOI: 10.3389/fmicb.2023.1177947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 06/14/2023] [Indexed: 07/20/2023] Open
Abstract
Mammalian gut microbiota plays an important role in the host's nutrient metabolism, growth, and immune regulation. Hybridization can enable a progeny to acquire superior traits of the parents, resulting in the hybridization advantage. However, studies on the effects of hybridization on the pigs' gut microbiota are lacking. Therefore, this study used multi-omics technologies to compare and analyze the gut microbiota of the primary wild boar and its offspring. The 16S rRNA gene sequencing results revealed that the gut microbiota of F4 exhibited a host-like dominance phenomenon with a significant increase in the abundance of Lactobacillus and Bifidobacterium. The beta diversity of Duroc was significantly different from those of F0, F2, and F4; after the host hybridization, the similarity of the beta diversity in the progeny decreased with the decrease in the similarity of the F0 lineage. The metagenomic sequencing results showed that the significantly enriched metabolic pathways in F4, such as environmental, circulatory system, fatty acid degradation adaptation, and fatty acid biosynthesis, were similar to those in F0. Moreover, it also exhibited similar significantly enriched metabolic pathways as those in Duroc, such as carbohydrate metabolism, starch and sucrose metabolism, starch-degrading CAZymes, lactose-degrading CAZymes, and various amino acid metabolism pathways. However, the alpha-amylase-related KOs, lipid metabolism, and galactose metabolism in F4 were significantly higher than those in Duroc and F0. Non-targeted metabolome technology analysis found that several metabolites, such as docosahexaenoic acid, arachidonic acid, and citric acid were significantly enriched in the F4 pigs as compared to those in F0. Based on Spearman correlation analysis, Lactobacillus and Bifidobacterium were significantly positively correlated with these metabolites. Finally, the combined metagenomic and metabolomic analysis suggested that the metabolic pathways, such as valine, leucine, and isoleucine biosynthesis and alanine aspartate and glutamate metabolism were significantly enriched in F4 pigs. In conclusion, the gut microbiota of F4 showed a similar host "dominance" phenomenon, which provided reference data for the genetics and evolution of microbiota and the theory of microbial-assisted breeding.
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Affiliation(s)
- Limin Wei
- Chongqing Key Laboratory of High Active Traditional Chinese Drug Delivery System, Chongqing Medical and Pharmaceutical College, Chongqing, China
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, College of Life Science and Engineering, Foshan University, Foshan, China
- College of Pharmacy, Chongqing Medical University, Chongqing, China
| | - Bo Zeng
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Siyuan Zhang
- School of Laboratory Medicine/Sichuan Provincial Engineering Laboratory for Prevention and Control Technology of Veterinary Drug Residue in Animal-Origin Food, Chengdu Medical College, Chengdu, China
| | - Wei Guo
- School of Laboratory Medicine/Sichuan Provincial Engineering Laboratory for Prevention and Control Technology of Veterinary Drug Residue in Animal-Origin Food, Chengdu Medical College, Chengdu, China
| | - Feng Li
- Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education), China West Normal University, Nanchong, China
| | - Jiangchao Zhao
- Division of Agriculture, Department of Animal Science, University of Arkansas, Fayetteville, AR, United States
| | - Ying Li
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, College of Life Science and Engineering, Foshan University, Foshan, China
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Dash J, Sethi M, Deb S, Parida D, Kar S, Mahapatra S, Minz AP, Pradhan B, Prasad P, Senapati S. Biochemical, functional and genomic characterization of a new probiotic Ligilactobacillus salivarius F14 from the gut of tribes of Odisha. World J Microbiol Biotechnol 2023; 39:171. [PMID: 37101059 DOI: 10.1007/s11274-023-03626-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Accepted: 04/18/2023] [Indexed: 04/28/2023]
Abstract
Characterization of new potential probiotics is desirable in the field of research on probiotics for their extensive use in health and disease. Tribes could be an unusual source of probiotics due to their unique food habits and least dependence on medications and consumption of antibiotics. The aim of the present study is to isolate lactic acid bacteria from tribal fecal samples of Odisha, India, and characterize their genetic and probiotic attributes. In this context one of the catalase-negative and Gram-positive isolates, identified using 16S rRNA sequencing as Ligilactobacillus salivarius, was characterized in vitro for its acid and bile tolerance, cell adhesion and antimicrobial properties. The whole genome sequence was obtained and analyzed for strain level identification, presence of genomic determinants for probiotic-specific features, and safety. Genes responsible for its antimicrobial and immunomodulatory functions were detected. The secreted metabolites were analyzed using high resolution mass spectroscopy; the results indicated that the antimicrobial potential could be due to the presence of pyroglutamic acid, propionic acid, lactic acid, 2-hydroxyisocaproic acid, homoserine, and glutathione, and the immuno-modulating activity, contributed by the presence of short chain fatty acids such as acetate, propionate, and butyrate. So, to conclude we have successfully characterized a Ligilactobacillus salivarius species with potential antimicrobial and immunomodulatory ability. The health-promoting effects of this probiotic strain and/or its derivatives will be investigated in future.
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Affiliation(s)
- Jayalaxmi Dash
- Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
| | - Manisha Sethi
- Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
- Regional Centre for Biotechnology, Faridabad, Haryana, India
| | - Sushanta Deb
- Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
- Department of Microbiology, AIIMS, New Delhi, India
| | - Deepti Parida
- Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
- Regional Centre for Biotechnology, Faridabad, Haryana, India
| | - Salona Kar
- Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
- Regional Centre for Biotechnology, Faridabad, Haryana, India
| | - Soumendu Mahapatra
- Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
| | - Aliva P Minz
- Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
- Regional Centre for Biotechnology, Faridabad, Haryana, India
| | - Biswaranjan Pradhan
- S. K. Dash Center of Excellence of Biosciences and Engineering & Technology (SKBET), Indian Institute of Technology Bhubaneswar, Bhubaneswar, Odisha, India
| | - Punit Prasad
- Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
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Liu M, Wang Y, Wang Z, Bao J, Zhao M, Ge G, Jia Y, Du S. Effects of Isolated LAB on Chemical Composition, Fermentation Quality and Bacterial Community of Stipa grandis Silage. Microorganisms 2022; 10:microorganisms10122463. [PMID: 36557716 PMCID: PMC9787380 DOI: 10.3390/microorganisms10122463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/05/2022] [Accepted: 12/10/2022] [Indexed: 12/15/2022] Open
Abstract
This study aimed to screen and identify lactic acid bacteria (LAB) strains from the Stipa grandis and naturally fermented silage, and assess their effects on the silage quality and bacterial community of Stipa grandis after 60 days of the fermentation process. A total of 38 LAB were isolated, and strains ZX301 and YX34 were identified as Lactiplantibacillus plantarum and Pediococcus pentosaceus using 16S rRNA sequences; they can normally grow at 10−30 °C, with a tolerance of pH and NaCl from 3.5 to 8.0 and 3 to 6.5%, respectively. Subsequently, the two isolated LAB and one commercial additive (Lactiplantibacillus plantarum) were added to Stipa grandis for ensiling for 60 days and recorded as the ZX301, YX34, and P treatments. The addition of LAB was added at 1 × 105 colony-forming unit/g of fresh weight, and the same amount of distilled water was sprayed to serve as a control treatment (CK). Compared to the CK treatment, the ZX301 and YX34 treatments exhibited a positive effect on pH reduction. The water-soluble carbohydrate content was significantly (p < 0.05) increased in ZX301, YX34, and P treatments than in CK treatment. At the genus level, the bacterial community in Stipa grandis silage involves a shift from Pantoea to Lactiplantibacillus. Compared to the CK treatment, the ZX301, YX34, and P treatments significantly (p < 0.05) increase the abundance of Pediococcus and Lactiplantibacillus, respectively. Consequently, the results indicated that the addition of LAB reconstructed microbiota and influenced silage quality. The strain ZX301 could improve the ensiling performance in Stipa grandis silage.
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Affiliation(s)
- Mingjian Liu
- Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization, Ministry of Agriculture, China, Key Laboratory of Grassland Resources, Ministry of Education, China, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot 010019, China
| | - Yu Wang
- Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization, Ministry of Agriculture, China, Key Laboratory of Grassland Resources, Ministry of Education, China, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot 010019, China
| | - Zhijun Wang
- Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization, Ministry of Agriculture, China, Key Laboratory of Grassland Resources, Ministry of Education, China, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot 010019, China
| | - Jian Bao
- Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization, Ministry of Agriculture, China, Key Laboratory of Grassland Resources, Ministry of Education, China, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot 010019, China
| | - Muqier Zhao
- Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization, Ministry of Agriculture, China, Key Laboratory of Grassland Resources, Ministry of Education, China, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot 010019, China
| | - Gentu Ge
- Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization, Ministry of Agriculture, China, Key Laboratory of Grassland Resources, Ministry of Education, China, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot 010019, China
| | - Yushan Jia
- Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization, Ministry of Agriculture, China, Key Laboratory of Grassland Resources, Ministry of Education, China, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot 010019, China
- Correspondence: (Y.J.); (S.D.)
| | - Shuai Du
- National Engineering Laboratory of Biological Feed Safety and Pollution Prevention and Control, Key Laboratory of Molecular Nutrition, Ministry of Education, Key Laboratory of Animal Nutrition and Feed, Ministry of Agriculture and Rural Affairs, Key Laboratory of Animal Nutrition and Feed Science of Zhejiang Province, Institute of Feed Science, Zhejiang University, Hangzhou 310058, China
- Correspondence: (Y.J.); (S.D.)
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Isolation and Characterization of Lactic Acid Bacteria from Fermented Milk Produced in Jimma Town, Southwest Ethiopia, and Evaluation of their Antimicrobial Activity against Selected Pathogenic Bacteria. INTERNATIONAL JOURNAL OF FOOD SCIENCE 2022; 2022:2076021. [PMID: 36561884 PMCID: PMC9767724 DOI: 10.1155/2022/2076021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 11/23/2022] [Accepted: 11/24/2022] [Indexed: 12/15/2022]
Abstract
Background Raw milk is usually contaminated with pathogenic bacteria. Fermentation of milk is important to inhibit the growth of contaminants, spoilage, and pathogenic bacteria. The objective of this study was to isolate lactic acid bacteria from fermented milk and evaluate their antimicrobial activity against selected pathogenic bacteria. Methods Laboratory-based experimental study design was conducted from May-July, 2021.Three samples of Ergo (each of 250 ml) were collected from Jimma town. Lactic acid bacteria (LAB) isolates were identified through integrated phenotypic techniques. Further identification was conducted through using API 50 CHL strips. Antimicrobial activities (AMAs) of LAB isolates were tested against clinical isolates of E. coli, S. aureus, and Salmonella spp. using agar well diffusion method. The data were analyzed by using SPSS software version 21 and Microsoft Excel spreadsheet. Tables and figures were applied to describe characteristics of data. Results Twelve LAB isolates were identified. Those LAB isolates include six Lactococcus lactis subsp. lactis, Lactobacillus acidophilus (2), Lactiplantibacillus plantarum (1), Limosilactobacillus fermentum (2), and Leuconostoc lactis (1). Based on primary screening of LAB, isolates/strains ESCIa, ESBIa, and ESCIc show strong AMA against S. aureus, E. coli, and Salmonella spp. The CFS of ESCIc showed the highest AMA against S. aureus and Salmonella spp. with a zone of inhibition of 14.12 ± 1.6 mm and 12.9 ± 3.6 mm, respectively, while ESBIa showed the highest AMA against E. coli with a zone of inhibition of 13.5 ± 2.1 mm. The CFSs of selected LAB strains were heat tolerant at varying temperatures up to 100°C. The CFSs of selected LAB strains were inactivated by proteinase enzymes, but they are not inactivated with amylase enzymes. Conclusions and Recommendation. All 12 LAB isolates exhibited antimicrobial activity against tested bacterial strains. Lactobacillus isolates showed the highest antagonistic activity on tested indicator strains. Thus, they are possible alternatives to antibiotics in the era of antimicrobial resistance. S. aureus was the most sensitive to antimicrobial effects/agents of selected LAB isolates. Consumption of fermented foods is advisable since they support the growth of healthy GIT microbiota. Fermentation serves as biopreservation of food. However, analysis of probiotic features and in vivo probiotic effects of those LAB isolates will be subject of future research/study.
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11
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Guo X, Xu D, Li F, Bai J, Su R. Current approaches on the roles of lactic acid bacteria in crop silage. Microb Biotechnol 2022; 16:67-87. [PMID: 36468295 PMCID: PMC9803335 DOI: 10.1111/1751-7915.14184] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 11/07/2022] [Accepted: 11/11/2022] [Indexed: 12/12/2022] Open
Abstract
Lactic acid bacteria (LAB) play pivotal roles in the preservation and fermentation of forage crops in spontaneous or inoculated silages. Highlights of silage LAB over the past decades include the discovery of the roles of LAB in silage bacterial communities and metabolism and the exploration of functional properties. The present article reviews published literature on the effects of LAB on the succession, structure, and functions of silage microbial communities involved in fermentation. Furthermore, the utility of functional LAB in silage preparation including feruloyl esterase-producing LAB, antimicrobial LAB, lactic acid bacteria with high antioxidant potential, pesticide-degrading LAB, lactic acid bacteria producing 1,2-propanediol, and low-temperature-tolerant LAB have been described. Compared with conventional LAB, functional LAB produce different effects; specifically, they positively affect animal performance, health, and product quality, among others. In addition, the metabolic profiles of ensiled forages show that plentiful probiotic metabolites with but not limited to antimicrobial, antioxidant, aromatic, and anti-inflammatory properties are observed in silage. Collectively, the current knowledge on the roles of LAB in crop silage indicates there are great opportunities to develop silage not only as a fermented feed but also as a vehicle of delivery of probiotic substances for animal health and welfare in the future.
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Affiliation(s)
- Xusheng Guo
- School of Life SciencesLanzhou UniversityLanzhouChina,Probiotics and Biological Feed Research CentreLanzhou UniversityLanzhouChina
| | - Dongmei Xu
- School of Life SciencesLanzhou UniversityLanzhouChina,Probiotics and Biological Feed Research CentreLanzhou UniversityLanzhouChina
| | - Fuhou Li
- School of Life SciencesLanzhou UniversityLanzhouChina,Probiotics and Biological Feed Research CentreLanzhou UniversityLanzhouChina
| | - Jie Bai
- School of Life SciencesLanzhou UniversityLanzhouChina,Probiotics and Biological Feed Research CentreLanzhou UniversityLanzhouChina
| | - Rina Su
- School of Life SciencesLanzhou UniversityLanzhouChina,Probiotics and Biological Feed Research CentreLanzhou UniversityLanzhouChina
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12
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Madjirebaye P, Xiao M, Mahamat B, Xiong S, Mueed A, Wei B, Huang T, Peng F, Xiong T, Peng Z. In vitro characteristics of lactic acid bacteria probiotics performance and antioxidant effect of fermented soymilk. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.101952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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13
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Daba GM, Mostafa FA, Saleh SAA, Elkhateeb WA, Awad G, Nomiyama T, Zendo T, El-Dein AN. Purification, amino acid sequence, and characterization of bacteriocin GA15, a novel class IIa bacteriocin secreted by Lactiplantibacillus plantarum GCNRC_GA15. Int J Biol Macromol 2022; 213:651-662. [PMID: 35667456 DOI: 10.1016/j.ijbiomac.2022.06.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 05/26/2022] [Accepted: 06/01/2022] [Indexed: 01/10/2023]
Abstract
The bacteriocins produced by lactic acid bacteria (LAB) are attracting attention due to their promising applications in food and pharmaceuticals fields. Hence, a LAB strain, GCNRC_GA15, was isolated from Egyptian goat cheese, and molecularly identified as Lactiplantibacillus plantarum. This strain showed a wide antimicrobial spectrum, which was found to be of proteineous nature, suggesting that L. plantarum GCNRC_GA15 is a bacteriocin-producer. This bacteriocin (bacteriocin GA15) was partially purified using cation exchange, and hydrophobic interaction chromatography. Tricine SDS-PAGE analysis for the fraction showing bacteriocin activity has estimated the molecular mass to be 4369 Da. Furthermore, amino acid sequencing of this peptide has detected 34 amino acids, and comparing its amino acid sequence with those of some pediocin-like bacteriocins revealed that bacteriocin GA15 has the conserved sequence (YYGNGV/L) in its N-terminal region which identified bacteriocin GA15 as a pediocin-like bacteriocin. Bacteriocin GA15 showed good heat and pH stabilities, and its activity was enhanced after treatment with Tween 80 or Triton X-100. Bacteriocin production medium was statistically optimized using the Plackett-Burman and Central Composite designs. As a result, bacteriocin production increased from 800 to 12,800 AU/ml using the optimized medium in comparison with result recorded for the un-optimized medium.
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Affiliation(s)
- Ghoson M Daba
- Chemistry of Natural and Microbial Products Department, Pharmaceutical Industries Research Institute, National Research Centre, Dokki, Giza 12622, Egypt.
| | - Faten A Mostafa
- Chemistry of Natural and Microbial Products Department, Pharmaceutical Industries Research Institute, National Research Centre, Dokki, Giza 12622, Egypt
| | - Shireen A A Saleh
- Chemistry of Natural and Microbial Products Department, Pharmaceutical Industries Research Institute, National Research Centre, Dokki, Giza 12622, Egypt
| | - Waill A Elkhateeb
- Chemistry of Natural and Microbial Products Department, Pharmaceutical Industries Research Institute, National Research Centre, Dokki, Giza 12622, Egypt
| | - Ghada Awad
- Chemistry of Natural and Microbial Products Department, Pharmaceutical Industries Research Institute, National Research Centre, Dokki, Giza 12622, Egypt
| | - Taisei Nomiyama
- Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Takeshi Zendo
- Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Asmaa Negm El-Dein
- Chemistry of Natural and Microbial Products Department, Pharmaceutical Industries Research Institute, National Research Centre, Dokki, Giza 12622, Egypt
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14
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Yang A, Wang K, Peng X, Lv F, Wang Y, Cui Y, Wang Y, Qu D, Zhou J, Si H. Effects of Different Sources of Calcium in the Diet on Growth Performance, Blood Metabolic Parameters, and Intestinal Bacterial Community and Function of Weaned Piglets. Front Nutr 2022; 9:885497. [PMID: 35571955 PMCID: PMC9101144 DOI: 10.3389/fnut.2022.885497] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 03/31/2022] [Indexed: 12/27/2022] Open
Abstract
Despite a well-documented effect of calcium on the piglet's intestinal microbiota composition, it is less known about changes in microbial function or the effect of different sources of calcium. The experiment was designed to study the effects of dietary calcium from different sources on production, immune indexes, antioxidant capacity, serum biochemical indexes, and intestinal microflora of weaning piglets. A total of 1,000 piglets were randomly assigned to five groups (10 replicate pens per treatment with 20 pigs per pen) and fed diets supplemented with calcium carbonate, calcium citrate, multiple calcium, organic trace minerals, and different concentrations of acidifier. The results showed that the replacement of calcium carbonate with calcium citrate and multiple calcium had almost no significant difference in the growth performance of pigs compared with the control group, and only the diet of multiple calcium dramatically decreased the average daily feed intake (ADFI) compared to the calcium citrate diet on days 15-28 (p < 0.05). The five groups did not change the content of MDA, SOD, and GSH-Px (p > 0.10). A similar situation occurs in the immune function of the blood. There was no significant effect in immune indexes (IgA, IgG, and IgM) among different treatments after weaning at 6 weeks for piglets (p > 0.10). The 16S rRNA sequencing of ileal and cecal microbiota revealed that only the relative abundance of Actinobacteriota at the phyla level was significantly greater in the ileum of the A group compared to the other treatments (p < 0.05). There was a clear effect on seven bacteria in the top 30 genera of ileum and cecum for five groups (p < 0.05). The result of PICRUSt predicted that the intestinal microbe was mainly involved in carbohydrate and amino acid metabolism, membrane transport, and metabolism of cofactors and vitamins. Besides, adding calcium citrate to a weaned piglet diet is better than other choices from the third week to the fourth week. In conclusion, diets with different calcium sources changed ADFI and some intestinal microbial composition of weaned piglets but had little effect on intestinal microbial function.
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Affiliation(s)
- Anqi Yang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Kaijun Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Animal Science and Technology, Guangxi University, Nanning, China.,Animal Nutritional Genome and Germplasm Innovation Research Center, College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| | - Xiaomin Peng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Feifei Lv
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Ying Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Yao Cui
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Yuhan Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Dongshuai Qu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Animal Science and Technology, Guangxi University, Nanning, China
| | | | - Hongbin Si
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Animal Science and Technology, Guangxi University, Nanning, China
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15
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The Impacts of Lactiplantibacillus plantarum on the Functional Properties of Fermented Foods: A Review of Current Knowledge. Microorganisms 2022; 10:microorganisms10040826. [PMID: 35456875 PMCID: PMC9026118 DOI: 10.3390/microorganisms10040826] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/11/2022] [Accepted: 04/13/2022] [Indexed: 12/17/2022] Open
Abstract
One of the most varied species of lactic acid bacteria is Lactiplantibacillus plantarum (Lb. plantarum), formerly known as Lactobacillus plantarum. It is one of the most common species of bacteria found in foods, probiotics, dairy products, and beverages. Studies related to genomic mapping and gene locations of Lb. plantarum have shown the novel findings of its new strains along with their non-pathogenic or non-antibiotic resistance genes. Safe strains obtained with new technologies are a pioneer in the development of new probiotics and starter cultures for the food industry. However, the safety of Lb. plantarum strains and their bacteriocins should also be confirmed with in vivo studies before being employed as food additives. Many of the Lb. plantarum strains and their bacteriocins are generally safe in terms of antibiotic resistance genes. Thus, they provide a great opportunity for improving the nutritional composition, shelf life, antioxidant activity, flavour properties and antimicrobial activities in the food industry. Moreover, since some Lb. plantarum strains have the ability to reduce undesirable compounds such as aflatoxins, they have potential use in maintaining food safety and preventing food spoilage. This review emphasizes the impacts of Lb. plantarum strains on fermented foods, along with novel approaches to their genomic mapping and safety aspects.
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16
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Ranjith FH, Muhialdin BJ, Arroo R, Yusof NL, Mohammed NK, Meor Hussin AS. Lacto-fermented polypeptides integrated with edible coatings for mango (Mangifera indica L.) bio-preservation. Food Control 2022. [DOI: 10.1016/j.foodcont.2021.108708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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17
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Novel Wound Dressing Based on Postbiotic/Chitosan Film Accelerates Cutaneous Wound Healing. Jundishapur J Microbiol 2022. [DOI: 10.5812/jjm.120806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Background: Wound healing is a complex and overlapping process involving immune cells, cytokines, and growth factors. Objectives: This study aimed to design and evaluate a novel wound dressing based on postbiotic/chitosan in accelerating wound healing. Methods: Lactobacillus reuteri PTCC1655 was cultured, and the cell-free supernatant (postbiotic) was obtained by medium centrifugation. The films were prepared using the solvent casting method and evaluated in terms of water absorption index, water vapor transmission rate, and antimicrobial properties. Forty-five male Wistar rats were subjected to a full-thickness excisional wound to assess the wound healing potential. The rats were randomly divided into ctrl-, chitosan, and postbiotic groups. The time-course histological and gene expression analysis was performed to compare the dressing efficacy. Results: The films showed proper water absorption and water vapor transmission rate and inhibited the pathogens commonly associated with wound infection. The postbiotic film improved wound healing by modulating the inflammatory phase, increasing collagen and elastin deposition, and enhancing angiogenesis based on the histological results. The gene expression assay showed that the postbiotic film accelerated wound healing by improving the expression of inflammatory mediators (IL-6 and TNF-α) and anti-inflammatory mediators (TGF-β and VEGF). Conclusions: The cell-free supernatant/chitosan/polyethylene glycol (CFS/CS/PEG) biodegradable film could be introduced as a novel dressing for cutaneous wound healing. This transparent film enhances cutaneous wound healing by modulating infiltrated immunity cells and expressing inflammatory/anti-inflammatory cytokines.
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18
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Zhao S, Hao X, Yang F, Wang Y, Fan X, Wang Y. Antifungal Activity of Lactobacillus plantarum ZZUA493 and Its Application to Extend the Shelf Life of Chinese Steamed Buns. Foods 2022; 11:foods11020195. [PMID: 35053928 PMCID: PMC8775031 DOI: 10.3390/foods11020195] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 01/06/2022] [Accepted: 01/08/2022] [Indexed: 02/08/2023] Open
Abstract
Lactic acid bacteria (LAB) can produce many kinds of antifungal substances, which have been widely proven to have antifungal activity. In this study, 359 strains of LAB were screened for antifungal activity against Aspergillus niger (A. niger) using the 96-well microtiter plate method, and three showed strong activity. Of these, ZZUA493 showed a broad-spectrum antifungal ability against A. niger, Aspergillus oryzae, Trichoderma longibrachiatum, Aspergillus flavus and Fusarium graminearum. ZZUA493 was identified as Lactobacillus plantarum. Protease treatment, the removal of hydrogen peroxide with catalase and heat treatment had no effect on the antifungal activity of the cell-free supernatant (CFS) of ZZUA493; organic acids produced by ZZUA493 appeared to have an important role in fungal growth inhibition. The contents of lactic acid, acetic acid and phenyllactic acid in the CFS tended to be stable at 48 h, and amounted to 28.5, 15.5 and 0.075 mg/mL, respectively. In addition, adding ZZUA493, as an ingredient during their preparation, prolonged the shelf life of Chinese steamed buns. Overall, ZZUA493 appears to have good potential as a fungal inhibitor for food preservation.
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Affiliation(s)
- Shanshan Zhao
- Henan Key Laboratory of Ion Beam Bio-Engineering, College of Physics, Zhengzhou University, Zhengzhou 450000, China; (S.Z.); (X.H.); (F.Y.); (Y.W.); (X.F.)
- Henan Key Laboratory of Ion Beam Bio-Engineering, School of Agricultural Science, Zhengzhou University, Zhengzhou 450000, China
| | - Xiangmei Hao
- Henan Key Laboratory of Ion Beam Bio-Engineering, College of Physics, Zhengzhou University, Zhengzhou 450000, China; (S.Z.); (X.H.); (F.Y.); (Y.W.); (X.F.)
- Henan Key Laboratory of Ion Beam Bio-Engineering, School of Agricultural Science, Zhengzhou University, Zhengzhou 450000, China
| | - Fengyuan Yang
- Henan Key Laboratory of Ion Beam Bio-Engineering, College of Physics, Zhengzhou University, Zhengzhou 450000, China; (S.Z.); (X.H.); (F.Y.); (Y.W.); (X.F.)
- Henan Key Laboratory of Ion Beam Bio-Engineering, School of Agricultural Science, Zhengzhou University, Zhengzhou 450000, China
| | - Yuan Wang
- Henan Key Laboratory of Ion Beam Bio-Engineering, College of Physics, Zhengzhou University, Zhengzhou 450000, China; (S.Z.); (X.H.); (F.Y.); (Y.W.); (X.F.)
- Henan Key Laboratory of Ion Beam Bio-Engineering, School of Agricultural Science, Zhengzhou University, Zhengzhou 450000, China
| | - Xiaomiao Fan
- Henan Key Laboratory of Ion Beam Bio-Engineering, College of Physics, Zhengzhou University, Zhengzhou 450000, China; (S.Z.); (X.H.); (F.Y.); (Y.W.); (X.F.)
- Henan Key Laboratory of Ion Beam Bio-Engineering, School of Agricultural Science, Zhengzhou University, Zhengzhou 450000, China
| | - Yanping Wang
- Henan Key Laboratory of Ion Beam Bio-Engineering, College of Physics, Zhengzhou University, Zhengzhou 450000, China; (S.Z.); (X.H.); (F.Y.); (Y.W.); (X.F.)
- Henan Key Laboratory of Ion Beam Bio-Engineering, School of Agricultural Science, Zhengzhou University, Zhengzhou 450000, China
- Correspondence: ; Tel.: +86-0371-67761726
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19
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Wang XL, Liu ZY, Li YH, Yang LY, Yin J, He JH, Hou DX, Liu YL, Huang XG. Effects of Dietary Supplementation of Lactobacillus delbrueckii on Gut Microbiome and Intestinal Morphology in Weaned Piglets. Front Vet Sci 2021; 8:692389. [PMID: 34490392 PMCID: PMC8417114 DOI: 10.3389/fvets.2021.692389] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 07/19/2021] [Indexed: 11/13/2022] Open
Abstract
Lactobacillus delbrueckii is a Gram-positive bacterium mostly used in the dairy industry for yogurt and cheese. The present study was designed to evaluate the effects of Lactobacillus delbrueckii on serum biochemical parameters, intestinal morphology, and performance by supplementing at a dietary level of 0.1% in diets for weaned piglets. Eighty healthy weaned piglets (initial body weight: 7.56 ± 0.2 kg) were randomly divided into two feeding groups with four replicates in each group (n = 10 animals per replicate); piglets were fed with basal diet (CON) or basal diet containing 0.1% Lactobacillus delbrueckii (LAC). The results showed that dietary supplementation of Lactobacillus delbrueckii improved growth performance and increased serum HDL and insulin levels in piglets on the 28th day of the experimental time (p < 0.05). The gut microbe analysis revealed that Lactobacillus delbrueckii significantly decreased the relative abundance of the phyla Bacteroidetes, but increased the relative abundance of the phyla Firmicutes. The Lactobacillus delbrueckii also significantly increased the relative abundance of Bifidobacterium and Lactobacillus at the genus level of the bacterial community in the ileum, but decreased the relative abundance of unclassified Clostridiales. Moreover, Lactobacillus delbrueckii improved mucosal morphology by obtaining higher intestinal villus height (p < 0.05), significantly increasing the concentrations of butyrate, isobutyric acid, and isovaleric acid in colonic chyme of piglets, but decreasing the intestinal pH at the duodenum and ileum on the 28th day of the experimental time. In conclusion, dietary supplementation of Lactobacillus delbrueckii in the diet of weaned piglets can improve intestinal morphology and modulate the microbiota community to promote growth performance.
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Affiliation(s)
- Xiao-Long Wang
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| | - Zhu-Ying Liu
- College of Animal Science and Technology, Hunan Biological and Electromechanical Polytechnic, Changsha, China
| | - Ying-Hui Li
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| | - Ling-Yuan Yang
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| | - Jie Yin
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| | - Jian-Hua He
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| | - De-Xing Hou
- The United Graduate School of Agricultural Science, Kagoshima University, Kagoshima, Japan
| | - Ya-Li Liu
- Hunan Pufeike Biotechnology Company, Changsha, China
| | - Xing-Guo Huang
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
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20
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Pitiwittayakul N, Bureenok S, Schonewille JT. Selective Thermotolerant Lactic Acid Bacteria Isolated From Fermented Juice of Epiphytic Lactic Acid Bacteria and Their Effects on Fermentation Quality of Stylo Silages. Front Microbiol 2021; 12:673946. [PMID: 34381426 PMCID: PMC8350162 DOI: 10.3389/fmicb.2021.673946] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Accepted: 06/22/2021] [Indexed: 11/21/2022] Open
Abstract
The aim of the present study was to isolate and identify lactic acid bacteria (LAB) from fermented juice of tropical crops such as Napier grass, Ruzi grass, Purple guinea grass, Stylo legume, and Leucaena and their application to improve the quality of tropical crop silage. Fifteen strains of LAB were isolated. The LAB strains were Gram-positive and catalase-negative bacteria and could be divided into three groups, i.e., Pediococcus pentosaceus, Lactiplantibacillus (para)plantarum, and Limosilactobacillus fermentum according to the biochemical API 50CH test. Based on the analysis of 16S rRNA sequence, the strains isolated in the group L. (para)plantarum were distinguished. Two isolates (N3 and G4) were identified as Lactiplantibacillus plantarum. Three isolates (St1, St2, and St3) were identified as L. paraplantarum. In addition, the identification of other isolates was confirmed in the group P. pentosaceus (R1, R4, R5, R8, R11, and L1) and the group L. fermentum (N4, G6, G7, and N4). All selected strains were able to grow at 50°C. All LAB strains showed antimicrobial activity against Escherichia coli ATCC 25922, Shigella sonnei ATCC 25931, Pseudomonas aeruginosa ATCC 27853, and Bacillus cereus ATCC 11778. Four selected LAB strains (St1, St3, N4, and R4) were tested for their capacity to successfully ensile Stylo legume (Stylosanthes guianensis CIAT184). Stylo silages treated with LAB were well preserved, the NH3–N and butyric acid contents were lower, and the lactic acid content was higher than those in the control (p < 0.05). The acetic acid content was the highest in R4-treated silage among the treatments (p < 0.05). The crude protein (CP) content of St1-silage was significantly (p < 0.05) higher than the others. The inoculation of thermotolerant LAB selected from fermented juice of epiphytic lactic acid bacteria (FJLB) was found to be highly instrumental to obtain well-preserved silage from the Stylo legume.
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Affiliation(s)
- Nittaya Pitiwittayakul
- Department of Agricultural Technology and Environment, Rajamangala University of Technology Isan, Nakhon Ratchasima, Thailand
| | - Smerjai Bureenok
- Department of Agricultural Technology and Environment, Rajamangala University of Technology Isan, Nakhon Ratchasima, Thailand
| | - Jan Thomas Schonewille
- Department of Agricultural Technology and Environment, Rajamangala University of Technology Isan, Nakhon Ratchasima, Thailand.,Department of Public Health Sciences, Utrecht University, Utrecht, Netherlands
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21
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Drouin P, Tremblay J, Renaud J, Apper E. Microbiota succession during aerobic stability of maize silage inoculated with Lentilactobacillus buchneri NCIMB 40788 and Lentilactobacillus hilgardii CNCM-I-4785. Microbiologyopen 2020; 10:e1153. [PMID: 33369186 PMCID: PMC7885010 DOI: 10.1002/mbo3.1153] [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: 10/16/2020] [Revised: 12/03/2020] [Accepted: 12/09/2020] [Indexed: 12/21/2022] Open
Abstract
Aerobic deterioration of silage following feeding out is responsible for the deterioration of its quality. Inoculation of silage with lactic acid bacteria is one strategy to limit these effects. A trial was performed using whole‐plant corn ensiled in bag silo, and forage was inoculated with Lentilactobacillus buchneri NCIMB 40788 (Lactobacillus buchneri) and Lentilactobacillus hilgardii CNCM‐I‐4785 (Lactobacillus hilgardii) or not (Control silage). After 159 days of fermentation, the silos were opened and the silage was sampled at 24‐h intervals during a 10‐day aerobic stability assay to measure pH, the fermentation profile, mycotoxins, and microbial and fungal populations. In inoculated silage, lactic acid concentrations and pH remained stable during the aerobic phase and higher microorganism alpha‐diversity was observed. Treated silage was characterized by a high abundance of Saccharomycetes and maintenance of Lactobacillus throughout the aerobic stability assay. The high aerobic stability of the inoculated silage contrasted with the decrease in lactic acid contents and the increase in pH observed in the Control silage, concomitantly with an increase in lactate‐assimilating yeast (Pichia and Issatchenkia), and in Acetobacter and Paenibacillus OTUs. Remarkably, Penicillium and roquefortine C were detected in this silage by day 8 following exposure to air. Our study highlighted the fact that the use of L. buchneri with L. hilgardii modified the consequences of exposure to air by maintaining higher microbial diversity, avoiding the dominance of a few bacteria, and preventing fungi from having a detrimental effect on silage quality.
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Affiliation(s)
| | - Julien Tremblay
- National Research Council of Canada, Energy, Mining, and Environment, Montréal, QC, Canada
| | - Justin Renaud
- London Research and Development Center, Agriculture and Agri-food Canada, London, ON, Canada
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Zeng T, Li X, Guan H, Yang W, Liu W, Liu J, Du Z, Li X, Xiao Q, Wang X, Zhang X, Huang L, Xiang Q, Peng Q, Yan Y. Dynamic microbial diversity and fermentation quality of the mixed silage of corn and soybean grown in strip intercropping system. BIORESOURCE TECHNOLOGY 2020; 313:123655. [PMID: 32559709 DOI: 10.1016/j.biortech.2020.123655] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 06/05/2020] [Accepted: 06/06/2020] [Indexed: 06/11/2023]
Abstract
This study assessed the fermentation quality and microbial community of corn (Zea mays L.) and soybean (Glycine max Merr.) (CS) mixed silage in strip intercropping system. CS mixed silage increased lactic acid content and decreased ammonia-N content compared to 100% soybean (S) silage, while it decreased ammonia-N content compared to 100% corn (C) silage. The largest number of epiphytic lactic acid bacteria was detected in CS fresh materials. During ensiling, Weissella and Lactobacillus dominated silage, the relative abundance of Lactobacillus in mixed silage was higher than that in S silage with the same S variety. After aerobic exposure (AE), synergistic effect existed in low relative abundance bacteria correlating with ammonia-N content and pH at ensiling 60 days and AE 7 days. In conclusion, CS mixed silage modified microbial community and improved fermentation quality.
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Affiliation(s)
- Tairu Zeng
- Animal Science and Technology College, Sichuan Agricultural University, Chengdu 610000, China
| | - Xiaoling Li
- Animal Science and Technology College, Sichuan Agricultural University, Chengdu 610000, China
| | - Hao Guan
- Animal Science and Technology College, Sichuan Agricultural University, Chengdu 610000, China
| | - Wenyu Yang
- College of Agronmy, Sichuan Agricultural University, Wenjiang, Sichuan 611130, China
| | - Weiguo Liu
- College of Agronmy, Sichuan Agricultural University, Wenjiang, Sichuan 611130, China
| | - Jiang Liu
- College of Agronmy, Sichuan Agricultural University, Wenjiang, Sichuan 611130, China
| | - Zhaochang Du
- Animal Science and Technology College, Sichuan Agricultural University, Chengdu 610000, China
| | - Xiaomei Li
- Animal Science and Technology College, Sichuan Agricultural University, Chengdu 610000, China; College of Grassland Science and Technology China Agricultural University, Peking 100000, China
| | - Qiyin Xiao
- Institute of Agricultural Science, Garze Prefecture, Kangding 626000, China
| | - Xiaochun Wang
- College of Agronmy, Sichuan Agricultural University, Wenjiang, Sichuan 611130, China
| | - Xinquan Zhang
- Animal Science and Technology College, Sichuan Agricultural University, Chengdu 610000, China
| | - Linkai Huang
- Animal Science and Technology College, Sichuan Agricultural University, Chengdu 610000, China
| | - Quanju Xiang
- College of Resource, Sichuan Agricultural University, Chengdu 610000, China
| | - Quanhui Peng
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Yanhong Yan
- Animal Science and Technology College, Sichuan Agricultural University, Chengdu 610000, China.
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Effects of Class IIa Bacteriocin-Producing Lactobacillus Species on Fermentation Quality and Aerobic Stability of Alfalfa Silage. Animals (Basel) 2020; 10:ani10091575. [PMID: 32899438 PMCID: PMC7552147 DOI: 10.3390/ani10091575] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 08/23/2020] [Accepted: 09/02/2020] [Indexed: 11/17/2022] Open
Abstract
Simple Summary Bacteriocins produced by lactic acid bacteria are considered good alternatives for feed antibiotics because of inhibiting spoilage microorganisms in silage and non-drug resistance in animals. Owing to the narrow antibacterial spectrum, class I bacteriocin-producing lactic acid bacteria are considered to have limitations as silage inoculants. The research was conducted to evaluate the effects of two class IIa bacteriocin-producing Lactobacillus on silage fermentation, microbial population, chemical composition, and aerobic stability. The strains results showed that class IIa bacteriocin-producing lactic acid bacteria could improve silage fermentation quality, reduce counts of molds and yeasts, and improve aerobic stability to a greater extent than inoculation with Lactobacillus plantarum MTD/1, a proven, widely used inoculant, which does not produce bacteriocin. The findings of this research are of great value for current understandings and onwards to conduct further research and for possible practical implementation of class IIa bacteriocin-producing lactic acid bacteria as silage inoculants. Abstract The effects of two strains of class IIa bacteriocin-producing lactic acid bacteria, Lactobacillus delbrueckii F17 and Lactobacillus plantarum (BNCC 336943), or a non-bacteriocin Lactobacillus plantarum MTD/1 (NCIMB 40027), on fermentation quality, microbial counts, and aerobic stability of alfalfa silage were investigated. Alfalfa was harvested at the initial flowering stage, wilted to a dry matter concentration of approximately 32%, and chopped to 1 to 2 cm length. Chopped samples were treated with nothing (control, CON), Lactobacillus delbrueckii F17 (F17), Lactobacillus plantarum (BNCC 336943) (LPB), or Lactobacillus plantarum MTD/1 (NCIMB 40027) (LPN), each at an application rate of 1 × 106 colony-forming units/g of fresh weight. Each treatment was ensiled in quadruplicate in vacuum-sealed polyethylene bags packed with 500 g of fresh alfalfa per bag and ensiled at ambient temperature (25 ± 2 °C) for 3, 7, 14, 30, and 60 days. The samples were then subjected to an aerobic stability test after 60 days of ensiling. Compared with the CON silage, the inoculants reduced the pH after 14 days of ensiling. After 60 days, pH was lowest in the LPB-treated silage, followed by the F17 and LPN-treated silages. Inoculation of F17 increased concentrations of lactic acid in silages fermented for 7, 14, 30, and 60 days relative to other treatments, except for the LPN-treated silages ensiled for 30 and 60 days, in which the lactic acid concentrations were similar to that of F17 silage. Application of F17 and LPB decreased the number of yeast and mold relative to CON and LPN-treated silages. Compared with the CON silage, inoculant-treated silages had greater aerobic stability, water-soluble carbohydrate, and crude protein concentrations, and lower neutral detergent fiber, amino acid nitrogen, and ammonia nitrogen concentrations. The LPB-treated silage had the greatest aerobic stability followed by the F17-treated silage. Both class IIa bacteriocin producing inoculants improved alfalfa silage fermentation quality, reduced the growth of yeasts and molds, and improved the aerobic stability of the ensiled forage to a greater extent than the proven LPN inoculant. However, higher crude protein concentration and lower ammonia nitrogen concentration were observed in LPN-treated silage relative to other treatments.
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Stimulation of Bovicin HC5 Production and Selection of Improved Bacteriocin-Producing Streptococcus equinus HC5 Variants. Probiotics Antimicrob Proteins 2020; 13:899-913. [PMID: 32865761 DOI: 10.1007/s12602-020-09703-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Bovicin HC5 is a peptide that has inhibitory activity against various pathogenic microorganisms and food spoilage bacteria. Aiming to improve the productivity of this bacteriocin, we evaluated several potential factors that could stimulate the synthesis of bovicin HC5 and selected variants of Streptococcus equinus (Streptococcus bovis) HC5 with enhanced bacteriocin production by adaptive laboratory evolution (ALE). The highest production of the bacteriocin (1.5-fold) was observed when Strep. equinus HC5 was cultivated with lactic acid (100 mmol/L). For the ALE experiment, Strep. equinus HC5 cells were subjected to acid-shock (pH 3.0 for 2 h) and maintained in continuous culture for approximately 140 generations (40 days) in media with lactic acid (100 mmol/L) and pH-controlled at 5.5 ± 0.2. An adapted variant was selected showing a distinct phenotype (sedimentation, pigmentation) compared with the parental strain. Bacteriocin production increased 2-fold in this adapted Strep. equinus HC5 variant, which appears to be associated with changes in the cell envelope of the adapted variant and enhanced bacteriocin release into the culture media. In addition, the adapted variant showed higher levels of expression of all bovicin HC5 biosynthetic genes compared with the parental strain during the early and late stages of growth. Results presented here indicate that ALE is a promising strategy for selecting strains of lactic acid bacteria with increased production of bacteriocins.
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Discovery and characterisation of circular bacteriocin plantacyclin B21AG from Lactiplantibacillus plantarum B21. Heliyon 2020; 6:e04715. [PMID: 32904251 PMCID: PMC7452424 DOI: 10.1016/j.heliyon.2020.e04715] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 04/22/2020] [Accepted: 08/11/2020] [Indexed: 02/06/2023] Open
Abstract
Lactiplantibacillus plantarum B21 isolated from Vietnamese sausage (nem chua) has previously displayed broad antimicrobial activity against Gram-positive bacteria including foodborne pathogens Listeria monocytogenes and Clostridium perfringens. This study successfully identified the antimicrobial agent as plantacyclin B21AG, a 5668 Da circular bacteriocin demonstrating high thermostability, resistance to a wide range of pH, proteolytic resistance and temporal stability. We report a reverse genetics approach to identify and characterise plantacyclin B21AG from first principles. The bacteriocin was purified from culture supernatant by a three-step process consisting of concentration, n-butanol extraction and cation exchange chromatography. A de novo peptide sequencing using LC-MS/MS techniques identified two putative peptide fragments which were mapped to the genome sequence of L. plantarum B21. This revealed an ORF corresponding to a putative circular bacteriocin with a 33-amino acid leader peptide and a 58-amino acid mature peptide encoded on a native plasmid pB21AG01. The bacteriocin is shown to be a small cationic predominantly α-helical protein (69%). The corresponding gene cluster, consisted of seven genes associated with post-translational circularisation, immunity and secretion. Whilst plantacyclin B21AG is 86% identical to the newly published plantaricyclin A it is more highly cationic having a net charge of +3 due to an additional basic residue in the putative membrane interaction region. This and other substitutions may well go some way to explaining functional differences. The robust nature of plantacyclin B21AG, its antimicrobial activity and associated machinery for cyclisation make it an interesting biotechnological target for development, both as a food-safe antimicrobial or potentially a platform technology for recombinant protein circularisation.
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Cell-free supernatant of Streptococcus salivarius M18 impairs the pathogenic properties of Pseudomonas aeruginosa and Klebsiella pneumonia. Arch Microbiol 2020; 202:2825-2840. [PMID: 32747998 DOI: 10.1007/s00203-020-02005-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 07/15/2020] [Accepted: 07/24/2020] [Indexed: 12/17/2022]
Abstract
M18 strain of Streptococcus salivarius is a bacterial replacement probiotic that has been suggested for use in the oral cavity. Here, we have shown that S. salivarius M18 cell-free supernatant reduced the growth of the two most common human pathogens Pseudomonas aeruginosa and Klebsiella pneumonia and sensitized the pathogenic bacteria to antibiotic. Besides, the supernatant inhibited biofilm formation of P. aeruginosa drastically. For pinpointing the biomolecular changes that occurred in P. aeruginosa incubated with the probiotic supernatant, attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy was used. Unsupervised learning algorithms, principal component analysis (PCA) and hierarchical cluster analysis (HCA), and intensity analyses of individual spectral bands exhibited comprehensive alterations in the polysaccharide and lipid contents and compositions of P. aeruginosa cultivated with S. salivarius M18 cell-free supernatant. These results indicate that S. salivarius M18 has the potential for the prevention or alleviation of different pathogen-induced infections along with the infections of oral pathogens.
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27
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Novel lactic acid bacteria strains enhance the conservation of elephant grass silage cv. BRS Capiaçu. Anim Feed Sci Technol 2020. [DOI: 10.1016/j.anifeedsci.2020.114472] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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28
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Peptide-Based Formulation from Lactic Acid Bacteria Impairs the Pathogen Growth in Ananas Comosus (Pineapple). COATINGS 2020. [DOI: 10.3390/coatings10050457] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Worldwide, street vending commerce has grown exponentially, representing in some countries, including Ecuador, a significant proportion of food consumed by the urban population. Pineapple is one of the common fruits sold as ready-to-eat slices by ambulant vendors in the street or on public transport at risk of contamination by various microorganisms. Previously, we selected Lactobacillus plantarum UTNCys5-4 and Lactococcus lactis subsp. lactis Gt28 strains producing peptides with high capacity to inhibit pathogen growth in vitro. In this study, the effect of different edited formulations containing a mixture of Cys5-4/Gt28 peptides was evaluated in vitro and ex vitro against a pathogenic cocktail containing E. coli (2), Salmonella (2) and Shigella (1). The growth of bacterial cocktail co-inoculated with cell-free supernatant containing peptides (formulation T1) and precipitated peptides (formulation T6), in a ratio of Cys5-4/Gt28:1:1 (v/v), results in a decrease of total cell viability with 1.85 and 1.2 log CFU/mL orders of magnitude at 6 h of incubation. About the same decrease (1.9 log CFU/g) was observed when pineapple slices artificially inoculated with the pathogenic cocktail were coated with T1 formulation, indicating the capacity to diminish simultaneous pathogens in situ, thus demonstrating its great biological control and protection. However, the E. coli cell counts reduced by 2.08 log CFU/g while Salmonella and Shigella cell counts reduced by 1.43 and 1.91 log CFU/g, respectively, at 5 days of refrigeration. In the untreated pineapple slices, the total cell density was maintained during storage, suggesting the adaptation of the pathogens to the fruit matrix. The peptide-based formulation exerted a bacteriolytic mode of action inducing pathogenic cell death. The results indicate that coating pineapple slices with peptide-based formulation is a promising approach to protect them from further contamination by microbial spoilage as well as an alternative to increase the food safety.
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Patil Y, Gooneratne R, Ju XH. Interactions between host and gut microbiota in domestic pigs: a review. Gut Microbes 2020; 11:310-334. [PMID: 31760878 PMCID: PMC7524349 DOI: 10.1080/19490976.2019.1690363] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 10/16/2019] [Accepted: 11/04/2019] [Indexed: 02/03/2023] Open
Abstract
It is well established that pig gut microbiota plays a critical role in maintaining metabolic homeostasis as well as in a myriad of physiological, neurological and immunological functions; including protection from pathogens and digestion of food materials - some of which would be otherwise indigestible by the pig. A rich and diverse gut microbial ecosystem (balanced microbiota) is the hallmark of good health; while qualitative and quantitative perturbations in the microbial composition can lead to development of various diseases. Alternatively, diseases caused by stressors or other factors have been shown to negatively impact the microbiota. This review focuses primarily on how commensal microorganisms in the gastrointestinal tract of pigs influence biochemical, physiological, immunological, and metabolic processes within the host animal.
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Affiliation(s)
- Yadnyavalkya Patil
- College of Agricultural Sciences, Department of Veterinary Medicine, Guangdong Ocean University, Zhanjiang, China
- Faculty of Agriculture and Life Sciences, Department of Wine, Food, and Molecular Biosciences, Lincoln University, Lincoln, Canterbury, New Zealand
- Shenzhen Institute, Guangdong Ocean University, Shenzhen, China
| | - Ravi Gooneratne
- Faculty of Agriculture and Life Sciences, Department of Wine, Food, and Molecular Biosciences, Lincoln University, Lincoln, Canterbury, New Zealand
| | - Xiang-Hong Ju
- College of Agricultural Sciences, Department of Veterinary Medicine, Guangdong Ocean University, Zhanjiang, China
- Shenzhen Institute, Guangdong Ocean University, Shenzhen, China
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Deng Q, Shao Y, Wang Q, Li J, Li Y, Ding X, Huang P, Yin J, Yang H, Yin Y. Effects and interaction of dietary electrolyte balance and citric acid on the intestinal function of weaned piglets. J Anim Sci 2020; 98:skaa106. [PMID: 32253427 PMCID: PMC7199884 DOI: 10.1093/jas/skaa106] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 04/04/2020] [Indexed: 12/17/2022] Open
Abstract
Fifty-six piglets (6.26 ± 0.64 kg BW) were weaned at 21 d and randomly assigned to one of the eight dietary treatments with seven replicate pens for a 14-d experimental period. The eight experimental diets were prepared via a 2 × 4 factorial arrangement with citric acid (CA; 0% and 0.3%) and dietary electrolyte balance (dEB, Na + K - Cl mEq/kg of the diet; -50, 100, 250, and 400 mEq/kg). Varying dEB values were obtained by altering the contents of calcium chloride and sodium bicarbonate. An interaction (P < 0.05) between dEB and CA in diarrhea score and the number of goblet cell in jejunum were observed. Ileum pH significantly decreased in weaned piglets fed 250 mEq/kg dEB diet compared with those fed -50 and 400 mEq/kg dEB diets (P < 0.05). Supplementation of 0.3% CA decreased the number of goblet cell in the ileal crypt (P < 0.05) and the relative mRNA expression of cystic fibrosis transmembrane conductance regulator, tumor necrosis factor-α, interferon-γ (IFN-γ), interleukin-1β (IL-1β), interleukin-10 (IL-10), zona occludens-1, and Claudin-1 (P < 0.05). Increasing dEB values increased the number of goblet cells in the jejunal crypt (P < 0.05). A 250-mEq/kg dEB diet decreased the relative mRNA expression of IFN-γ, IL-1β, and IL-10 (P < 0.05) than 100-mEq/kg dEB diet. The interaction between dEB and CA on the relative abundances of Cyanobacteria and Saccharibacteria was observed (P < 0.05). Supplementation of 0.3% CA increased relative abundances of and Streptococcus hyointestinalis. Piglets fed 250-mEq/kg diet increased relative abundances of Firmicutes and Lactobacillus rennini, and decreased the relative abundance of Proteobacteria, Veillonella, Actinobacillus minor, and Escherichia-Shigella.In conclusion, supplementation of 0.3% CA resulted in differential expression of inflammatory cytokines, ion transporters, and tight junction proteins, and changes in the microbial community composition. A 250-mEq/kg dEB diet reduced gastrointestinal pH and promoted the enrichment of beneficial microbes in the gut microbiota, thereby suppressing inflammation and harmful bacteria. However, the addition of CA to diets with different dEB values did not promote intestinal function in weaned piglets.
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Affiliation(s)
- Qingqing Deng
- Laboratory of Animal Nutrition and Human Health, Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, College of Life Science, Hunan Normal University, Changsha, Hunan, China
| | - Yirui Shao
- Laboratory of Animal Nutritional Physiology and Metabolic Process, Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan, China
| | - Qiye Wang
- Laboratory of Animal Nutrition and Human Health, Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, College of Life Science, Hunan Normal University, Changsha, Hunan, China
| | - Jianzhong Li
- Laboratory of Animal Nutrition and Human Health, Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, College of Life Science, Hunan Normal University, Changsha, Hunan, China
| | - Yali Li
- Laboratory of Animal Nutrition and Human Health, Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, College of Life Science, Hunan Normal University, Changsha, Hunan, China
| | - Xueqin Ding
- Laboratory of Animal Nutrition and Human Health, Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, College of Life Science, Hunan Normal University, Changsha, Hunan, China
| | - Pengfei Huang
- Laboratory of Animal Nutrition and Human Health, Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, College of Life Science, Hunan Normal University, Changsha, Hunan, China
| | - Jia Yin
- Laboratory of Animal Nutrition and Human Health, Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, College of Life Science, Hunan Normal University, Changsha, Hunan, China
| | - Huansheng Yang
- Laboratory of Animal Nutrition and Human Health, Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, College of Life Science, Hunan Normal University, Changsha, Hunan, China
- Laboratory of Animal Nutritional Physiology and Metabolic Process, Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan, China
| | - Yulong Yin
- Laboratory of Animal Nutrition and Human Health, Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, College of Life Science, Hunan Normal University, Changsha, Hunan, China
- Laboratory of Animal Nutritional Physiology and Metabolic Process, Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan, China
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Khalil OAA, Mounir AM, Hassanien RA. Effect of gamma irradiated Lactobacillus bacteria as an edible coating on enhancing the storage of tomato under cold storage conditions. JOURNAL OF RADIATION RESEARCH AND APPLIED SCIENCES 2020. [DOI: 10.1080/16878507.2020.1723886] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Ola A. A. Khalil
- Radiation Microbiology Department, National Centre for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - Amr M. Mounir
- Natural Products Research Department, National Centre for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - Ramadan A. Hassanien
- Food Irradiation Department, National Centre for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
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Zhao S, Wang Y, Yang F, Wang Y, Zhang H. Screening a
Lactobacillus plantarum
strain for good adaption in alfalfa ensiling and demonstrating its improvement of alfalfa silage quality. J Appl Microbiol 2020; 129:233-242. [DOI: 10.1111/jam.14604] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 01/23/2020] [Accepted: 02/01/2020] [Indexed: 11/29/2022]
Affiliation(s)
- S.S. Zhao
- Henan Key Laboratory of Ion Beam Bio‐engineering School of Agricultural Science Zhengzhou University Zhengzhou P. R. China
| | - Y.P. Wang
- Henan Key Laboratory of Ion Beam Bio‐engineering School of Agricultural Science Zhengzhou University Zhengzhou P. R. China
| | - F.Y. Yang
- Henan Key Laboratory of Ion Beam Bio‐engineering School of Agricultural Science Zhengzhou University Zhengzhou P. R. China
| | - Y. Wang
- Henan Key Laboratory of Ion Beam Bio‐engineering School of Agricultural Science Zhengzhou University Zhengzhou P. R. China
| | - H. Zhang
- Henan Key Laboratory of Ion Beam Bio‐engineering School of Agricultural Science Zhengzhou University Zhengzhou P. R. China
- College of Food and Bioengineering Henan University of Animal Husbandry and Economy Zhengzhou P. R. China
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Goel A, Halami PM, Tamang JP. Genome Analysis of Lactobacillus plantarum Isolated From Some Indian Fermented Foods for Bacteriocin Production and Probiotic Marker Genes. Front Microbiol 2020; 11:40. [PMID: 32063893 PMCID: PMC7000354 DOI: 10.3389/fmicb.2020.00040] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 01/09/2020] [Indexed: 01/09/2023] Open
Abstract
In this study, Lactobacillus plantarum strain DHCU70 isolated from dahi, a fermented milk product and L. plantarum strain DKP1 isolated from kinema, a fermented soybean food of India, respectively were evaluated for their bacteriocin production and probiotic properties. Both strains of L. plantarum (DHCU70 and DKP1) were found to have potent antimicrobial activity against Kocuria rhizophila ATCC 9341. Bacteriocin produced by L. plantarum strains DHCU70 and DKP1 did not exhibit inhibition of cell wall, DNA and fatty acids biosynthesis mechanisms as evaluated by whole cell reporter assays. We characterized the bacteriocin encoding genes in L. plantarum strains DHCU70 and DKP1 by whole genome sequence which consisted of a single and circular chromosome with genome size of 3.38 Mb (GC content of 44.3%) and 3.39 Mb, respectively and a GC content of 44.3%. L. plantarum DHCU70 has 3252 number of protein encoding genes comprising 89 number of RNA genes (69tRNA, 16rRNA, 4nc RNA) whereas L. plantarum DKP1 has total of 3277 number of protein encoding genes with 89 number. of RNA genes (69tRNA, 16S rRNA, 4nc RNA). Analysis revealed the presence of 20.5 kb long and 23 numbers of plantaricin encoding locus (pln locus) for production of antimicrobial compound. BAGEL analysis has shown that the pln locus of both the strains of L. plantarum showed maximum sequence similarity with plantaricin NC8 of L. plantarum NC8, originally isolated from grass silage. Annotated whole genome sequence of both strains DHCU70 and DKP1 was analyzed for the presence of probiotic marker genes. The probiotic properties of these strains of were also evaluated in vitro. Due to the presence of genes responsible for antimicrobial activity and probiotic properties, both strains of L. plantarum may be considered as a suitable probiotic candidate in food industry.
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Affiliation(s)
- Aditi Goel
- Department of Microbiology and Fermentation Technology, CSIR-Central Food Technological Research Institute, Mysuru, India
| | - Prakash M. Halami
- Department of Microbiology and Fermentation Technology, CSIR-Central Food Technological Research Institute, Mysuru, India
| | - Jyoti Prakash Tamang
- DBT-AIST International Centre for Translational and Environmental Research and Bioinformatics Centre, Department of Microbiology, School of Life Sciences, Sikkim University, Gangtok, India
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Tan X, Li J, Li Y, Li J, Wang Q, Fang L, Ding X, Huang P, Yang H, Yin Y. Effect of chicken egg yolk immunoglobulins on serum biochemical profiles and intestinal bacterial populations in early-weaned piglets. J Anim Physiol Anim Nutr (Berl) 2019; 103:1503-1511. [PMID: 31144409 PMCID: PMC7166376 DOI: 10.1111/jpn.13129] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Revised: 04/23/2019] [Accepted: 05/04/2019] [Indexed: 01/24/2023]
Abstract
This study was conducted to test the hypothesis that dietary supplementation with anti-E. coli, chicken egg yolk immunoglobulins (IgY), may affect early weaned piglet (EWP) intestinal functions and enteric micro-organisms. One hundred and forty-eight ([Landrace × Yorkshire] × Duroc) piglets, weaned at age day 21, were randomly assigned to receive one of three diets for 14 days. Treatment group one (control group) was fed the base diet. Treatment group two (antibiotics group) was fed the base diet which was supplemented with 100 ppm colistin sulphate and 15 ppm enramycin; treatment group three (IgY group) was fed the base diet which was supplemented with 500 mg/kg anti-E. coli IgY. The study evaluated the effects on EWPs of IgY on growth, serum biochemical, inflammatory profiles and also digestion content intestinal bacterial populations. Results showed no significant difference in diarrhoea rates between IgY-fed EWPs and antibiotic-treated EWPs. Serum biochemical analysis showed that EWPs fed an IgY-containing diet had both lower (p < 0.05) cholesterol and low-density lipoprotein compared to antibiotic-treated EWPs. Escherichia coli populations measured in IgY-fed EWP ileal contents, compared to the control group, were significantly reduced (p < 0.05). Enterococcus, Lactobacillus, Clostridium and Bifidobacterium populations were unaffected by the IgY treatment. Larger (p < 0.05) Enterococcus populations and lower (p < 0.05) expression levels of heat-stable enterotoxin b (STb) were observed in IgY-fed EWP caecal digesta compared to the control group. Enteric Lactobacillus significantly decreased (p < 0.05) in EWPs fed antibiotics while it was unaffected by IgY treatment. Dietary supplementation with anti-E. coli IgY has the potential to suppress enteric E. coli growth, but not Lactobacillus, Clostridium and Bifidobacterium. This promotes and maintains a healthy EWP intestinal environment. These findings suggest that IgY may be used as an alternative to antibiotics in EWP diets.
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Affiliation(s)
- Xian Tan
- Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Animal Nutrition and Human Health Laboratory, School of Life Sciences, Hunan Normal University, Changsha, China
| | - Jia Li
- Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Animal Nutrition and Human Health Laboratory, School of Life Sciences, Hunan Normal University, Changsha, China.,Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
| | - Yali Li
- Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Animal Nutrition and Human Health Laboratory, School of Life Sciences, Hunan Normal University, Changsha, China
| | - Jianzhong Li
- Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Animal Nutrition and Human Health Laboratory, School of Life Sciences, Hunan Normal University, Changsha, China
| | - Qingping Wang
- Zyme Fast (Changsha) Biotechnology Co., Ltd., Changsha, China
| | - Lin Fang
- Zyme Fast (Changsha) Biotechnology Co., Ltd., Changsha, China
| | - Xueqin Ding
- Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Animal Nutrition and Human Health Laboratory, School of Life Sciences, Hunan Normal University, Changsha, China
| | - Pengfei Huang
- Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Animal Nutrition and Human Health Laboratory, School of Life Sciences, Hunan Normal University, Changsha, China
| | - Huansheng Yang
- Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Animal Nutrition and Human Health Laboratory, School of Life Sciences, Hunan Normal University, Changsha, China.,Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
| | - Yulong Yin
- Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Animal Nutrition and Human Health Laboratory, School of Life Sciences, Hunan Normal University, Changsha, China.,Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
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Yan Y, Li X, Guan H, Huang L, Ma X, Peng Y, Li Z, Nie G, Zhou J, Yang W, Cai Y, Zhang X. Microbial community and fermentation characteristic of Italian ryegrass silage prepared with corn stover and lactic acid bacteria. BIORESOURCE TECHNOLOGY 2019; 279:166-173. [PMID: 30721817 DOI: 10.1016/j.biortech.2019.01.107] [Citation(s) in RCA: 117] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 01/21/2019] [Accepted: 01/22/2019] [Indexed: 06/09/2023]
Abstract
The bacterial community determined via PacBio single molecule, real-time sequencing technology (SMRT) and the fermentation characteristics of Italian ryegrass (IR, 82% moisture) silage prepared with corn stover (CS) were investigated. A selected strain of Lactobacillus plantarum (L694) and a commercial inoculant stain of Lactobacillus plantarum (LP) were used as additives. Lactic acid bacteria (LAB) effectively improved silage quality. After fermentation, Lactobacillus plantarum was the dominant species in IR + LP and IR + L694 treatments, which led to higher (P < 0.05) lactic acid and lower (P < 0.05) butyric acid production. Lactobacillus plantarum, Lactobacillus hammesii, Lactobacillus brevis, and Lactobacillus coryniformis were abundantly present in IR + CS + LP and IR + CS + L694 treatments, and acetic acid contents of these were higher (P < 0.05) than those of other silages. This study demonstrated that addition of CS and LAB can change the microbial community and influence the silage fermentation of IR, and PacBio SMRT reveals more specific microbial information.
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Affiliation(s)
- Yanhong Yan
- Animal Science and Technology College, Sichuan Agricultural University, Chengdu 610000, China
| | - Xiaomei Li
- Animal Science and Technology College, Sichuan Agricultural University, Chengdu 610000, China
| | - Hao Guan
- Animal Science and Technology College, Sichuan Agricultural University, Chengdu 610000, China
| | - Linkai Huang
- Animal Science and Technology College, Sichuan Agricultural University, Chengdu 610000, China
| | - Xiao Ma
- Animal Science and Technology College, Sichuan Agricultural University, Chengdu 610000, China
| | - Yan Peng
- Animal Science and Technology College, Sichuan Agricultural University, Chengdu 610000, China
| | - Zhou Li
- Animal Science and Technology College, Sichuan Agricultural University, Chengdu 610000, China
| | - Gang Nie
- Animal Science and Technology College, Sichuan Agricultural University, Chengdu 610000, China
| | - Jiqiong Zhou
- Animal Science and Technology College, Sichuan Agricultural University, Chengdu 610000, China
| | - Wenyu Yang
- College of Agronmy, Sichuan Agricultural University, Wenjiang, Sichuan 611130, China
| | - Yimin Cai
- Japan International Research Center for Agricultural Science (JIRCAS), Tsukuba, Ibaraki 305-8686, Japan.
| | - Xinquan Zhang
- Animal Science and Technology College, Sichuan Agricultural University, Chengdu 610000, China.
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Screening for Cholesterol-Lowering Probiotics from Lactic Acid Bacteria Isolated from Corn Silage Based on Three Hypothesized Pathways. Int J Mol Sci 2019; 20:ijms20092073. [PMID: 31035460 PMCID: PMC6539855 DOI: 10.3390/ijms20092073] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 04/11/2019] [Accepted: 04/24/2019] [Indexed: 12/20/2022] Open
Abstract
A total of 85 strains of lactic acid bacteria were isolated from corn silage in this study and analyzed in vitro for their cholesterol removal, NPC1L1 protein down-regulation and bile salt deconjugation ability, respectively. Nineteen strains were selected for further analysis for their probiotic potential. Finally, 3 strains showing better probiotic potential were evaluated for their cholesterol-lowering activity in hamsters. The strains showing the greater cholesterol removal and NPC1L1 protein down-regulation activity had no significant effects on serum and hepatic cholesterol levels in hamsters (p > 0.05). However, Lactobacillus plantarum CAAS 18008 (1 × 109 CFU/d) showing the greater bile salt deconjugation ability significantly reduced serum low-density lipoprotein cholesterol, total cholesterol, and hepatic total cholesterol levels by 28.8%, 21.7%, and 30.9%, respectively (p < 0.05). The cholesterol-lowering mechanism was attributed to its bile salt hydrolase activity, which enhanced daily fecal bile acid excretion levels and thereby accelerated new bile acid synthesis from cholesterol in liver. This study demonstrated that the strains showing greater cholesterol removal and NPC1L1 protein down-regulation activity in vitro hardly reveal cholesterol-lowering activity in vivo, whereas the strains showing greater bile salt deconjugation ability in vitro has large potential to decrease serum cholesterol levels in vivo.
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Bah A, Albano H, Barbosa JB, Fhoula I, Gharbi Y, Najjari A, Boudabous A, Teixeira P, Ouzari HI. Inhibitory Effect of Lactobacillus plantarum FL75 and Leuconostoc mesenteroides FL14 against Foodborne Pathogens in Artificially Contaminated Fermented Tomato Juices. BIOMED RESEARCH INTERNATIONAL 2019; 2019:6937837. [PMID: 30931330 PMCID: PMC6413396 DOI: 10.1155/2019/6937837] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 01/10/2019] [Indexed: 11/29/2022]
Abstract
Tomatoes and tomato based-foods contain beneficial microorganisms and various organic acids that have important nutritional values for human. The objective of this study was to access the physiochemical properties of fermented tomatoes juices and to evaluate the competitiveness of lactic acid bacteria (LAB) against Listeria monocytogenes, Listeria innocua, and Salmonella spp., in artificially contaminated tomato juice. Microbial counting (LAB, fungi Salmonella spp., and Listeria spp.) was performed after fermentation and weekly during storage. Different organic acids (Lactic, succinic, and acetic) and ethanol were also monitored using HPLC method. Color parameters were also determined. The results showed an increase of lactic and acetic acid content, during fermentation and storage of juices inoculated with Lactobacillus plantarum and Leuconostoc mesenteroides at 25°C. Besides, citric acid and ethanol revealed higher content at the end of storage compared to that registered at 4°C. The pH from tomatoes juices decreased from an initial value of 4.5 to below 3.2. Alongside, foodborne pathogen population was significantly suppressed in tomatoes juices when the samples were coinoculated with LAB strains. Moreover, the inhibition of Salmonella species was faster compared to that of Listeria. After four weeks of storage at 4°C, Lb. plantarum and Lc. mesenteroides showed high survival rate, while pathogenic bacteria, yeasts, and molds cell numbers decreased drastically in all the contaminated vials. This work highlights the efficiency of Lb. plantarum and Lc. mesenteroides as potential starters for developing nutritious and safe fermented tomato juice products.
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Affiliation(s)
- Aïssé Bah
- Laboratoire de Microorganismes et Biomolécules Actives (LR03ES03), Faculté des Sciences de Tunis, Université Tunis El Manar, Campus Universitaire, 2092, Tunis, Tunisia
| | - Helena Albano
- Universidade Católica Portuguesa, CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital 172, 4200-374 Porto, Portugal
| | - Joana Bastos Barbosa
- Universidade Católica Portuguesa, CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital 172, 4200-374 Porto, Portugal
| | - Imene Fhoula
- Laboratoire de Microorganismes et Biomolécules Actives (LR03ES03), Faculté des Sciences de Tunis, Université Tunis El Manar, Campus Universitaire, 2092, Tunis, Tunisia
| | - Yosra Gharbi
- Laboratoire de Microorganismes et Biomolécules Actives (LR03ES03), Faculté des Sciences de Tunis, Université Tunis El Manar, Campus Universitaire, 2092, Tunis, Tunisia
| | - Afef Najjari
- Laboratoire de Microorganismes et Biomolécules Actives (LR03ES03), Faculté des Sciences de Tunis, Université Tunis El Manar, Campus Universitaire, 2092, Tunis, Tunisia
| | - Abdellatif Boudabous
- Laboratoire de Microorganismes et Biomolécules Actives (LR03ES03), Faculté des Sciences de Tunis, Université Tunis El Manar, Campus Universitaire, 2092, Tunis, Tunisia
| | - Paula Teixeira
- Universidade Católica Portuguesa, CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital 172, 4200-374 Porto, Portugal
| | - Hadda-Imene Ouzari
- Laboratoire de Microorganismes et Biomolécules Actives (LR03ES03), Faculté des Sciences de Tunis, Université Tunis El Manar, Campus Universitaire, 2092, Tunis, Tunisia
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Biopreservation potential of antimicrobial protein producing Pediococcus spp. towards selected food samples in comparison with chemical preservatives. Int J Food Microbiol 2018; 291:189-196. [PMID: 30544035 DOI: 10.1016/j.ijfoodmicro.2018.12.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 09/11/2018] [Accepted: 12/06/2018] [Indexed: 01/30/2023]
Abstract
The present study elucidates biopreservation potential of an antimicrobial protein; bacteriocin, producing Pediococcus spp. isolated from dairy sample and enhancement of their shelf life in comparison with two chemical preservatives. The antimicrobial protein producing Pediococcus spp. was isolated from selected diary samples and characterised by standard microbiology and molecular biology protocols. The cell free supernatant of Pediococcus spp. was applied on the selected food samples and monitored on daily basis. Antimicrobial potential of the partially purified protein from this bacterium was tested against clinical isolates by well diffusion assay. The preservation efficiency of bacteriocin producing isolate at various concentrations was tested against selected food samples and compared with two chemical preservatives such as sodium sulphite and sodium benzoate. The bacteriocin was partially purified and the microbiological qualities of the biopreservative treated food samples were assessed. The present study suggested that 100 μg/l of bacteriocin extract demonstrated antimicrobial potential against E. coli and Shigella spp. The treatment with the Pediococcus spp. showed enhanced preservation at 15 mL/kg of selected samples for a period of 15 days in comparison with sodium sulphite and sodium benzoate. The microbiological quality of food samples treated with biopreservative showed lesser total bacterial count (CFU/g) in comparison with the food samples applied with chemicals (p ≤ 0.05). Thus, the present study suggests that bacteriocin producing Pediococcus probably provides enhanced shelf life to the selected food samples and can be used as biopreservatives.
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Sun L, Wang Z, Gentu G, Jia Y, Hou M, Cai Y. Changes in microbial population and chemical composition of corn stover during field exposure and effects on silage fermentation and in vitro digestibility. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2018; 32:815-825. [PMID: 30477289 PMCID: PMC6498072 DOI: 10.5713/ajas.18.0514] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 11/09/2018] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To effectively use corn stover resources as animal feed, the changes in microbial population and chemical composition of corn stover during field exposure, and their silage fermentation and in vitro digestibility were studied. METHODS Corn cultivars (Jintian, Jinnuo, and Xianyu) stovers from 4 random sections of the field were harvested at the preliminary dough stage of maturity on September 2, 2015. The corn stover exposed in the field for 0, 7, 15, 30, 60, 90, and 180 d, and their silages at 60 d of ensiling were used for the analysis of microbial population, chemical composition, fermentation quality, and in vitro digestibility. Data were analyzed with a completely randomized 3×6 [corn stover cultivar (C)×exposure d (D)] factorial treatment design. Analysis of variance was performed using SAS ver. 9.0 software (SAS Institute Inc., Cary, NC, USA). RESULTS Aerobic bacteria were dominant population in fresh corn stover. After ensiling, the lactic acid bacteria (LAB) became the dominant bacteria, while other microbes decreased or dropped below the detection level. The crude protein (CP) and water-soluble carbohydrate (WSC) for fresh stover were 6.74% to 9.51% and 11.75% to 13.21% on a dry matter basis, respectively. After exposure, the CP and WSC contents decreased greatly. Fresh stover had a relatively low dry matter while high WSC content and LAB counts, producing silage of good quality, but the dry stover did not. Silage fermentation inhibited nutrient loss and improved the fermentation quality and in vitro digestibility. CONCLUSION The results confirm that fresh corn stover has good ensiling characteristics and that it can produce silage of good quality.
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Affiliation(s)
- Lin Sun
- Key Laboratory of Grassland Resources, Ministry of Education, P.R. of China, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot 010019, China.,Inner Mongolia Academy of Agricultural Sciences & Animal Husbandry, Hohhot, Inner Mongolia, 010030, China
| | - Zhijun Wang
- Inner Mongolia Institute of Grassland Surveying and Planning, Hohhot, Inner Mongolia 010051, China
| | - Ge Gentu
- Key Laboratory of Grassland Resources, Ministry of Education, P.R. of China, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot 010019, China
| | - Yushan Jia
- Key Laboratory of Grassland Resources, Ministry of Education, P.R. of China, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot 010019, China
| | - Meiling Hou
- College of Agriculture, Inner Mongolia University of Nationalities, Tongliao 028000, China
| | - Yimin Cai
- Japan International Research Center for Agricultural Science (JIRCAS), Tsukuba, Ibaraki 305-8686, Japan
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Xu DM, Ke WC, Zhang P, Li FH, Guo XS. Characteristics of Pediococcus pentosaceus Q6 isolated from Elymus nutans growing on the Tibetan Plateau and its application for silage preparation at low temperature. J Appl Microbiol 2018; 126:40-48. [PMID: 30223299 DOI: 10.1111/jam.14110] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 08/17/2018] [Accepted: 09/11/2018] [Indexed: 11/30/2022]
Abstract
AIMS Characteristics of a strain Pediococcus pentosaceus Q6 isolated from Elymus nutans growing on the Tibetan plateau and its effects on E. nutans silage fermentation stored at low temperature were investigated. METHODS AND RESULTS Sugar fermentation pattern and growth profiles of the strain Q6 and its reference strain APP were characterized. The strain Q6 and APP were inoculated to E. nutans at ensiling respectively; and ensiled at different temperatures (10, 15 and 25°C) for 30, 60 and 90 days. The results indicated that Q6 could grow at pH 3·0 and at 4°C. In contrast to APP, Q6 could ferment mannitol, saccharose, sorbitol and rhamnose. Lower pH in Q6-treated silages fermented for 60 days at 10 and 15°C was found compared with the control and APP-treated groups. For the silages that were stored at 10 or 15°C, the greatest lactic acid content were detected in Q6-inoculated silages ensiled for 30 and 60 days respectively. There were no differences in pH and lactic acid content between Q6- and APP-treated silages ensiled at 10 and 15°C for 90 days respectively. CONCLUSIONS Inoculation of the strain P. pentosaceus Q6 could improve fermentation quality of ensiled E. nutans at the early stage of ensiling stored at low temperature (10 or 15°C). SIGNIFICANCE AND IMPACT OF THE STUDY The selection of P. pentosaceus inoculants for improving silage quality at low temperature, which provides a candidate strain to make high-quality silage in regions with frigid climate.
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Affiliation(s)
- D M Xu
- State Key Laboratory of Grassland and Agro-ecosystems, School of Life Sciences, Lanzhou University, Lanzhou, China.,Probiotics and Biological Feed Research Centre, Lanzhou University, Lanzhou, China
| | - W C Ke
- State Key Laboratory of Grassland and Agro-ecosystems, School of Life Sciences, Lanzhou University, Lanzhou, China.,Probiotics and Biological Feed Research Centre, Lanzhou University, Lanzhou, China
| | - P Zhang
- State Key Laboratory of Grassland and Agro-ecosystems, School of Life Sciences, Lanzhou University, Lanzhou, China.,Probiotics and Biological Feed Research Centre, Lanzhou University, Lanzhou, China
| | - F H Li
- Probiotics and Biological Feed Research Centre, Lanzhou University, Lanzhou, China.,Stay Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - X S Guo
- State Key Laboratory of Grassland and Agro-ecosystems, School of Life Sciences, Lanzhou University, Lanzhou, China.,Probiotics and Biological Feed Research Centre, Lanzhou University, Lanzhou, China
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Zarour K, Prieto A, Pérez-Ramos A, Kihal M, López P. Analysis of technological and probiotic properties of Algerian L. mesenteroides strains isolated from dairy and non-dairy products. J Funct Foods 2018. [DOI: 10.1016/j.jff.2018.09.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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Linares-Morales JR, Gutiérrez-Méndez N, Rivera-Chavira BE, Pérez-Vega SB, Nevárez-Moorillón GV. Biocontrol Processes in Fruits and Fresh Produce, the Use of Lactic Acid Bacteria as a Sustainable Option. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2018. [DOI: 10.3389/fsufs.2018.00050] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
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Xu Z, Zhang S, Zhang R, Li S, Kong J. The changes in dominant lactic acid bacteria and their metabolites during corn stover ensiling. J Appl Microbiol 2018; 125:675-685. [DOI: 10.1111/jam.13914] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 04/29/2018] [Accepted: 05/07/2018] [Indexed: 01/08/2023]
Affiliation(s)
- Z. Xu
- State Key Laboratory of Microbial Technology; Shandong University; Jinan China
| | - S. Zhang
- State Key Laboratory of Microbial Technology; Shandong University; Jinan China
| | - R. Zhang
- Research and Development Department; Jinan Senkang Sanfeng Biological Engineering Co., Ltd; Jinan China
| | - S. Li
- Research and Development Department; Jinan Senkang Sanfeng Biological Engineering Co., Ltd; Jinan China
| | - J. Kong
- State Key Laboratory of Microbial Technology; Shandong University; Jinan China
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Maldonado NC, Ficoseco CA, Mansilla FI, Melián C, Hébert EM, Vignolo GM, Nader-Macías MEF. Identification, characterization and selection of autochthonous lactic acid bacteria as probiotic for feedlot cattle. Livest Sci 2018. [DOI: 10.1016/j.livsci.2018.04.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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45
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Xu Z, Zhang S, Mu Y, Kong J. Paenibacillus panacisoli enhances growth of Lactobacillus spp. by producing xylooligosaccharides in corn stover ensilages. Carbohydr Polym 2017; 184:435-444. [PMID: 29352939 DOI: 10.1016/j.carbpol.2017.12.044] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 12/13/2017] [Accepted: 12/14/2017] [Indexed: 12/25/2022]
Abstract
The knowledge about the association of lignocellulosic biomass-degrading microbes with lactic acid bacteria (LAB) in ensilages is still limited. Paenibacillus strains are important microbes in sustainable agriculture. Here, P. panacisoli SDMCC050309 was isolated from ensiled corn stover and used as an example to investigate the effects on LAB. This strain produced at least 7 xylanases, and two of them were purified and characterized. Temperature and pH optima were determined to be 55 °C and 8.0 for Xyn10 and 40 °C and 7.0 for Xyn11, respectively. They could degraded larch wood xylan and alkali-pretreated corn stover into xylooligosaccharides (XOS). Using the produced XOS to culture Lactobacillus brevis SDMCC050297 and L. parafarraginis SDMCC050300, both of them grew well with high level of acetic acid production. The same phenomenon was observed when co-culturing those two Lactobacillus strains with P. panacisoli SDMCC050309. Therefore, P. panacisoli enhances growth of LAB by producing XOS in corn stover ensilages.
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Affiliation(s)
- Zhenshang Xu
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, PR China
| | - Susu Zhang
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, PR China
| | - Yingli Mu
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, PR China
| | - Jian Kong
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, PR China.
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Ma Q, Fu Y, Sun H, Huang Y, Li L, Yu Q, Dinnyes A, Sun Q. Antimicrobial resistance of Lactobacillus spp. from fermented foods and human gut. Lebensm Wiss Technol 2017. [DOI: 10.1016/j.lwt.2017.07.059] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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47
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Effects of inoculants Lactobacillus brevis and Lactobacillus parafarraginis on the fermentation characteristics and microbial communities of corn stover silage. Sci Rep 2017; 7:13614. [PMID: 29051616 PMCID: PMC5648770 DOI: 10.1038/s41598-017-14052-1] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 10/03/2017] [Indexed: 11/08/2022] Open
Abstract
To improve silage quality of crop forages, bacterial inoculants are often employed. In this study, Lactobacillus brevis SDMCC050297 and Lactobacillus parafarraginis SDMCC050300 were used as inoculants to corn stover in lab silos for ensiling. At the initial stage of ensiling, the pH value of the inoculated silages reduced more drastically, and the inoculated silages had higher lactic acid and acetic acid contents. After 20 days of ensiling, a reduction in lactic acid content coupled with an increase in acetic acid and 1,2-propanediol contents was observed in inoculated silages. Furthermore, both the amount of lactic acid bacteria and the abundance of order Lactobacillales in inoculated silages were higher than those of controls in the whole process. Meanwhile, Lb. brevis predominated before day 20 and then the dominance was shifted to Lb. parafarraginis until the late stage of ensiling. In contrast, the epiphytic Lactococcus lactic and Lb. plantarum played major roles at the beginning of naturally fermented silages and then Lb. plantarum and Lb. brevis were the most abundant at the later stage. In conclusion, these two selected strains had capability of improving the silage quality and providing the reproducible ensiling process, thus having the potential as silage inoculants.
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Nemcová R, Maďar M, Gancarčíková S, Pistl J. The Influence of Supplementation of Feed with Lactobacillus reuteri L2/6 Biocenol on Intestinal Microbiota of Conventional Mice. FOLIA VETERINARIA 2017. [DOI: 10.1515/fv-2017-0024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
FISH (fluorescence in situ hybridization) analysis of the intestinal tract of conventional mice, following 14-day supplementation of feed with host non-specific (porcine) strain L. reuteri L2/6, showed in the presence of complex microbiota, a significant increase in the counts of representatives of the genera Lactobacillus and Bifidobacterium, and a significant decrease in the representatives of the genera Clostridium, Bacteroides and Enterobacteriaceae. At the same time, the supplemented strain stimulated the population of caecal lactobacilli of the species L. reuteri. These results demonstrated that the L. reuteri L2/6 colonised the jejunum, ileum and caecum and modulated the investigated intestinal microbiota.
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Affiliation(s)
- R. Nemcová
- Department of Microbiology and Immunology , University of Veterinary Medicine and Pharmacy , Komenského 73, 041 81 Košice , Slovakia
| | - M. Maďar
- Department of Microbiology and Immunology , University of Veterinary Medicine and Pharmacy , Komenského 73, 041 81 Košice , Slovakia
| | - S. Gancarčíková
- Department of Microbiology and Immunology , University of Veterinary Medicine and Pharmacy , Komenského 73, 041 81 Košice , Slovakia
| | - J. Pistl
- Department of Microbiology and Immunology , University of Veterinary Medicine and Pharmacy , Komenského 73, 041 81 Košice , Slovakia
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Influence of Whey Protein Concentrate on the Production of Antibacterial Peptides Derived from Fermented Milk by Lactic Acid Bacteria. Int J Pept Res Ther 2017. [DOI: 10.1007/s10989-017-9596-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Dowarah R, Verma AK, Agarwal N. The use of Lactobacillus as an alternative of antibiotic growth promoters in pigs: A review. ACTA ACUST UNITED AC 2016; 3:1-6. [PMID: 29767055 PMCID: PMC5941084 DOI: 10.1016/j.aninu.2016.11.002] [Citation(s) in RCA: 109] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 10/28/2016] [Accepted: 11/05/2016] [Indexed: 11/28/2022]
Abstract
Antibiotics, often supplemented in feed, used as a growth promoter, may cause their residual effect in animal produce and also trigger antibiotic resistance in bacteria, which is of serious concern among swine farming entrepreneurs. As an alternative, supplementing probiotics gained interest in recent years. Lactobacillus being the most commonly used probiotic agent improves growth performance, feed conversion efficiency, nutrient utilization, intestinal microbiota, gut health and regulates immune system in pigs. The characteristics of Lactobacillus spp. and their probiotic effects in swine production are reviewed here under.
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Affiliation(s)
- Runjun Dowarah
- CAFT in Animal Nutrition, Indian Veterinary Research Institute, Izatnagar 243122, India
| | - A K Verma
- CAFT in Animal Nutrition, Indian Veterinary Research Institute, Izatnagar 243122, India
| | - Neeta Agarwal
- CAFT in Animal Nutrition, Indian Veterinary Research Institute, Izatnagar 243122, India
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