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Azevedo I, Barbosa J, Albano H, Nogueira T, Teixeira P. Lactic Acid Bacteria isolated from traditional and innovative alheiras as potential biocontrol agents. Food Microbiol 2024; 119:104450. [PMID: 38225051 DOI: 10.1016/j.fm.2023.104450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 12/07/2023] [Accepted: 12/09/2023] [Indexed: 01/17/2024]
Abstract
From a selection of seven traditional and 14 innovative alheiras, 491 lactic acid bacteria (LAB) were isolated and tested for their antimicrobial activity against several food-borne pathogens. Among these, six strains revealed antimicrobial activity through potential bacteriocin production against 14 Listeria monocytogenes strains, Enterococcus faecalis ATCC 29212, Clostridium sporogenes ESB050, and Clostridium perfringens ESB054. Through whole genome sequencing (WGS), these strains were identified as Lactiplantibacillus plantarum (2), Leuconostoc mesenteroides (1), and Pediococcus acidilactici (3). Furthermore, several orthologues of class II bacteriocins genes were identified, including Plantaricin E, Plantaricin F, Pediocin PA, Enterocin X, Leucocin A, and Coagulin A. No virulence or antibiotic resistance genes' orthologues were detected by WGS analysis. However, the selected LAB strains showed variable phenotypic patterns related to virulence genes and antibiotic resistance when assessed through classical methodologies. None of these strains demonstrated the production of biogenic amines, gelatinase or DNase. Additionally, no hemolytic activity or lipase enzyme production was observed. However, only Lpb. plantarum 9A3 was sensitive to all tested antibiotics and was thus chosen for further examination. The bacteriocins produced by Lpb. plantarum (9A3) exhibited stability across a broad range of conditions, including temperatures from 4 to 100 °C, pH values ranging from 2 to 8, exposure to surfactants and detergents (Tween 20 and 80, SDS, EDTA 0.1, 2 and 5 mM, urea and sodium deoxycholate), and enzymes (papain and catalase). Their maximum activity (AU/mL = 12,800) against four L. monocytogenes strains was observed between 21 and 36 h of growth of Lbp. plantarum 9A3, indicating a bacteriostatic mode of action. Therefore, this strain appears to be a robust candidate for potential application as a protective strain to be used in the food industry. Not only is it safe, but it also produces stable bacteriocins (harbouring genes encoding for the production of three) effectively inhibiting significant pathogens such as L. monocytogenes and C. perfringens.
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Affiliation(s)
- Inês Azevedo
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
| | - Joana Barbosa
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal.
| | - Helena Albano
- Escola Superior de Enfermagem de Coimbra, Portugal; Instituto Politécnico de Viana do Castelo, Escola Superior Agrária, Refóios, 4990-706 Ponte de Lima, Portugal
| | - Teresa Nogueira
- Instituto Nacional de Investigação Agrária e Veterinária, I.P., 2780-157, Oeiras, 4485-655, Vairão, Portugal; CE3c - Centre for Ecology, Evolution and Environmental Changes & CHANGE - Global Change and Sustainability Institute, Faculdade de Ciências da Universidade de Lisboa, 1749-016, Lisboa, Portugal
| | - Paula Teixeira
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
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Yang H, Luo X, Zhu L, Liang R, Mao Y, Yang X, Niu L, Zhang Y, Dong P. The biological effect of a beef-derived Latilactobacillus sakei on beef steaks during chilled storage. Food Sci Nutr 2022; 11:1059-1072. [PMID: 36789062 PMCID: PMC9922142 DOI: 10.1002/fsn3.3143] [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: 07/07/2022] [Revised: 10/26/2022] [Accepted: 11/04/2022] [Indexed: 11/16/2022] Open
Abstract
The aim of this study was to investigate the biological inhibiting effect of a beef-derived Latilactobacillus sakei (RS-25) on the spoilage of beef steaks in overwrapped packaging during the 12 days of storage at 4°C. Beef quality as well as microbial indicators were determined at different intervals during the storage after the inoculation of RS-25 at the 6 log CFU/g, and the high-throughput sequencing was applied to investigate the changes of microbial community structure during the storage. The inoculation of RS-25 on beef had no effect (p > .05) on pH, TBARS, and TVB-N during storage indicating the weak effect of such strain on the eat quality. Furthermore, the rise of L* and the delayed decline of a* and b* reveal the protection effect of RS-25 on the meat color. RS-25 reduced the re-contaminated Salmonella typhimurium by 1.16 log CFU/g (p < .01), and the growth of Brochothrix thermosphacta was also inhibited but no inhibition was found on the Pseudomonas spp. at the first 6 days of storage. The inhibiting effect of RS-25 was covered by the rapid growth of other microorganism during the following 6 days of storage. Consistent with the microbial counts results, high-throughput sequencing analysis confirmed that the inoculated L. sakei RS-25 was dominant at first 6 days, and then replaced by Pseudomonas spp. The findings obtained from the current study may provide basic information for the further application of bioprotective bacteria in preservation of beef steaks in the overwrapped packaging.
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Affiliation(s)
- Huixuan Yang
- Lab of Beef Processing and Quality Control, College of Food Science and EngineeringShandong Agricultural UniversityTai'anChina,National R&D Center for Beef Processing TechnologyTai'anChina
| | - Xin Luo
- Lab of Beef Processing and Quality Control, College of Food Science and EngineeringShandong Agricultural UniversityTai'anChina,National R&D Center for Beef Processing TechnologyTai'anChina
| | - Lixian Zhu
- Lab of Beef Processing and Quality Control, College of Food Science and EngineeringShandong Agricultural UniversityTai'anChina,National R&D Center for Beef Processing TechnologyTai'anChina
| | - Rongrong Liang
- Lab of Beef Processing and Quality Control, College of Food Science and EngineeringShandong Agricultural UniversityTai'anChina,National R&D Center for Beef Processing TechnologyTai'anChina
| | - Yanwei Mao
- Lab of Beef Processing and Quality Control, College of Food Science and EngineeringShandong Agricultural UniversityTai'anChina,National R&D Center for Beef Processing TechnologyTai'anChina
| | - Xiaoyin Yang
- Lab of Beef Processing and Quality Control, College of Food Science and EngineeringShandong Agricultural UniversityTai'anChina,National R&D Center for Beef Processing TechnologyTai'anChina
| | - Lebao Niu
- Lab of Beef Processing and Quality Control, College of Food Science and EngineeringShandong Agricultural UniversityTai'anChina,National R&D Center for Beef Processing TechnologyTai'anChina
| | - Yimin Zhang
- Lab of Beef Processing and Quality Control, College of Food Science and EngineeringShandong Agricultural UniversityTai'anChina,National R&D Center for Beef Processing TechnologyTai'anChina
| | - Pengcheng Dong
- Lab of Beef Processing and Quality Control, College of Food Science and EngineeringShandong Agricultural UniversityTai'anChina,National R&D Center for Beef Processing TechnologyTai'anChina
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Han J, Dong P, Holman BWB, Yang H, Chen X, Zhu L, Luo X, Mao Y, Zhang Y. Processing interventions for enhanced microbiological safety of beef carcasses and beef products: A review. Crit Rev Food Sci Nutr 2022; 64:2105-2129. [PMID: 36148812 DOI: 10.1080/10408398.2022.2121258] [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: 11/03/2022]
Abstract
Chilled beef is inevitably contaminated with microorganisms, starting from the very beginning of the slaughter line. A lot of studies have aimed to improve meat safety and extend the shelf life of chilled beef, of which some have focused on improving the decontamination effects using traditional decontamination interventions, and others have investigated newer technologies and methods, that offer greater energy efficiency, lower environmental impacts, and better assurances for the decontamination of beef carcasses and cuts. To inform industry, there is an urgent need to review these interventions, analyze the merits and demerits of each technology, and provide insight into 'best practice' to preserve microbial safety and beef quality. In this review, the strategies and procedures used to inhibit the growth of microorganisms on beef, from slaughter to storage, have been critiqued. Critical aspects, where there is a lack of data, have been highlighted to help guide future research. It is also acknowledge that different intervention programs for microbiological safety have different applications, dependent on the initial microbial load, the type of infrastructures, and different stages of beef processing.
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Affiliation(s)
- Jina Han
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Taian, Shandong, P. R. China
- National R&D Center for Beef Processing Technology, Tai'an, Shandong, P. R. China
| | - Pengcheng Dong
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Taian, Shandong, P. R. China
- National R&D Center for Beef Processing Technology, Tai'an, Shandong, P. R. China
| | - Benjamin W B Holman
- Centre for Red Meat and Sheep Development, NSW Department of Primary Industries, Cowra, New South Wales, Australia
| | - Huixuan Yang
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Taian, Shandong, P. R. China
- National R&D Center for Beef Processing Technology, Tai'an, Shandong, P. R. China
| | - Xue Chen
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Taian, Shandong, P. R. China
- National R&D Center for Beef Processing Technology, Tai'an, Shandong, P. R. China
| | - Lixian Zhu
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Taian, Shandong, P. R. China
- National R&D Center for Beef Processing Technology, Tai'an, Shandong, P. R. China
| | - Xin Luo
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Taian, Shandong, P. R. China
- National R&D Center for Beef Processing Technology, Tai'an, Shandong, P. R. China
| | - Yanwei Mao
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Taian, Shandong, P. R. China
- National R&D Center for Beef Processing Technology, Tai'an, Shandong, P. R. China
| | - Yimin Zhang
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Taian, Shandong, P. R. China
- National R&D Center for Beef Processing Technology, Tai'an, Shandong, P. R. China
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Saraiva MAF, Birri DJ, Brede DA, Baracat-Pereira MC, de Queiroz MV, Nes IF, de Moraes CA. Nisin Z Production by Wild Strains of Lactococcus lactis Isolated from Brazilian (Italian Type) Fermented Sausage. Int J Microbiol 2020; 2020:9309628. [PMID: 32351575 PMCID: PMC7178509 DOI: 10.1155/2020/9309628] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 01/02/2020] [Accepted: 02/17/2020] [Indexed: 11/17/2022] Open
Abstract
In this study, five bacteriocin-producing Lactococcus lactis strains were identified from different naturally fermented Brazilian sausages. Ion exchange and reversed-phase chromatographies were used to purify the bacteriocins from culture supernatant of the five strains. Mass spectrometry (MALDI-TOF/TOF) showed that the molecular masses of the bactericoins from L. lactis ID1.5, ID3.1, ID8.5, PD4.7, and PR3.1 were 3330.567 Da, 3330.514 Da, 3329.985 Da, 3329.561 Da, and 3329.591 Da, respectively. PCR product sequence analysis confirmed that the structural genes of bacteriocins produced by the five isolates are identical to the lantibiotic nisin Z. Optimal nisin Z production was achieved in tryptone and casein peptone, at pH 6.0 or 6.5. The most favorable temperatures for nisin Z production were 25°C and 30°C, and its production was better under aerobic than anaerobic condition. The type of carbon source appeared to be an important factor for nisin Z production. While sucrose was found to be the most efficient carbon source for nisin Z production by four L. lactis isolates, fructose was the best for one isolate. Lactose was also a good energy source for nisin Z production. Surprisingly, glucose was clearly the poorest carbon source for nisin Z production. The five isolates produced different amounts of the bacteriocin, L. lactis ID1.5 and ID8.5 isolates being the best nisin Z producers. DNA sequence analysis did not reveal any sequence differences in the nisZ and nisF promoter regions that could explain the differences in nisin Z production, suggesting that there should be other factors responsible for differential nisin Z production by the isolates.
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Affiliation(s)
| | - Dagim Jirata Birri
- Department of Microbial, Cellular and Molecular Biology, Addis Ababa University, Addis Ababa, Ethiopia
| | - Dag Anders Brede
- Department of Environmental Sciences, Norwegian University of Life Sciences, Ås, Norway
| | | | | | - Ingolf F Nes
- Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway
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5
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Biotechnological potential and in vitro safety assessment of Lactobacillus curvatus BCS35, a multibacteriocinogenic strain isolated from dry-salted cod (Gadus morhua). Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2019.05.117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Vasilopoulos C, De Vuyst L, Leroy F. Shelf-life Reduction as an Emerging Problem in Cooked Hams Underlines the Need for Improved Preservation Strategies. Crit Rev Food Sci Nutr 2016; 55:1425-43. [PMID: 24915326 DOI: 10.1080/10408398.2012.695413] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Cooked hams have gained an important position within the delicatessen market. Nowadays, consumers not only demand superior sensory properties but also request low levels of sodium and fat and the absence of conventional chemicals and preservatives used for the increase of the technological yield and shelf-life of the products. As a result, products that apply strict quality certificates or ''clean'' labels become increasingly important. However, such cooked hams suffer from a limited shelf-life. Besides some physicochemical effects, this is mainly due to microbial impact, despite the application of modified-atmosphere-packaging and chilling. Microbial spoilage is mostly due to the metabolic manifestation of lactic acid bacteria and Brochothrix thermosphacta, although Enterobacteriaceae and yeasts may occur too. Several preservation strategies have been developed to prolong the shelf-life of such vulnerable cooked meat products by targeting the microbial communities, with different rates of success. Whereas high-pressure treatments do not always pose a straightforward solution, a promising strategy relates to the use of bioprotective cultures containing lactic acid bacteria. The latter consist of strains that are deliberately added to the ham to outcompete undesirable microorganisms. Spoilage problems seem, however, to be specific for each product and processing line, underlining the importance of tailor-made solutions.
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Affiliation(s)
- Charalampos Vasilopoulos
- a Research Group of Industrial Microbiology and Food Biotechnology (IMDO), Faculty of Sciences and Bio-engineering Sciences , Vrije Universiteit Brussel , Pleinlaan 2, B-1050 , Brussels , Belgium
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7
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Casaburi A, Di Martino V, Ferranti P, Picariello L, Villani F. Technological properties and bacteriocins production by Lactobacillus curvatus 54M16 and its use as starter culture for fermented sausage manufacture. Food Control 2016. [DOI: 10.1016/j.foodcont.2015.05.016] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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8
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Abbasiliasi S, Tan JS, Kadkhodaei S, Nelofer R, Tengku Ibrahim TA, Mustafa S, Ariff AB. Enhancement of BLIS production by Pediococcus acidilactici kp10 in optimized fermentation conditions using an artificial neural network. RSC Adv 2016. [DOI: 10.1039/c5ra22879d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The present study was aimed at enhancing the production of BLIS produced byPediococcus acidilacticiKp10 through optimizing the fermentation parameters.
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Affiliation(s)
- Sahar Abbasiliasi
- Laboratory of Halal Science Research
- Halal Products Research Institute
- Universiti Putra Malaysia
- 43400 UPM Serdang
- Malaysia
| | - Joo Shun Tan
- Bioprocess Technology
- School of Industrial Technology
- Universiti Sains Malaysia
- Malaysia
| | - Saeid Kadkhodaei
- Institute of Tropical Agriculture
- Universiti Putra Malaysia
- 43400 UPM Serdang
- Malaysia
| | - Rubina Nelofer
- Food and Biotechnology Research Centre
- PCSIR
- Laboratories Complex
- 54600 Lahore
- Pakistan
| | | | - Shuhaimi Mustafa
- Laboratory of Halal Science Research
- Halal Products Research Institute
- Universiti Putra Malaysia
- 43400 UPM Serdang
- Malaysia
| | - Arbakariya B. Ariff
- Bioprocessing and Biomanufacturing Research Centre
- Universiti Putra Malaysia
- 43400 UPM Serdang
- Malaysia
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9
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Saá Ibusquiza P, Nierop Groot M, Debán-Valles A, Abee T, den Besten HM. Impact of growth conditions and role of sigB on Listeria monocytogenes fitness in single and mixed biofilms cultured with Lactobacillus plantarum. Food Res Int 2015. [DOI: 10.1016/j.foodres.2015.03.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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10
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Interstrain interactions between bacteria isolated from vacuum-packaged refrigerated beef. Appl Environ Microbiol 2015; 81:2753-61. [PMID: 25662972 DOI: 10.1128/aem.03933-14] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The formation of bacterial spoilage communities in food is influenced by both extrinsic and intrinsic environmental factors. Although many reports describe how these factors affect bacterial growth, much less is known about interactions among bacteria, which may influence community structure. This study investigated interactions among representative species of bacteria isolated from vacuum-packaged (VP) beef. Thirty-nine effectors and 20 target isolates were selected, representing 10 bacterial genera: Carnobacterium, Pseudomonas, Hafnia, Serratia, Yersinia, Rahnella, Brochothrix, Bacillus, Leuconostoc, and Staphylococcus. The influence of live effectors on growth of target isolates was measured by spot-lawn agar assay and also in liquid culture medium broth using live targets and effector cell-free supernatants. Inhibition on agar was quantified by diameter of inhibition zone and in broth by measuring detection time, growth rate, and maximum population density. A number of interactions were observed, with 28.6% of isolates inhibiting and 4.2% promoting growth. The majority of Pseudomonas isolates antagonized growth of approximately one-half of target isolates. Two Bacillus spp. each inhibited 16 targets. Among lactic acid bacteria (LAB), Carnobacterium maltaromaticum inhibited a wider range of isolates compared to other LAB. The majority of effector isolates enhancing target isolate growth were Gram-negative, including Pseudomonas spp. and Enterobacteriaceae. These findings markedly improve the understanding of potential interactions among spoilage bacteria, possibly leading to more mechanistic descriptions of bacterial community formation in VP beef and other foods.
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Zaeim D, Soleimanian-Zad S, Sheikh-Zeinoddin M. Identification and Partial Characterization of a Bacteriocin-Like Inhibitory Substance (BLIS) fromLb. BulgaricusK41 Isolated from Indigenous Yogurts. J Food Sci 2013; 79:M67-73. [DOI: 10.1111/1750-3841.12314] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Accepted: 10/08/2013] [Indexed: 11/29/2022]
Affiliation(s)
- Davood Zaeim
- Dept. of Food Science and Technology; College of Agriculture; Isfahan Univ. of Technology; Isfahan 84156-83111 Iran
| | - Sabihe Soleimanian-Zad
- Dept. of Food Science and Technology; College of Agriculture; Isfahan Univ. of Technology; Isfahan 84156-83111 Iran
| | - Mahmoud Sheikh-Zeinoddin
- Dept. of Food Science and Technology; College of Agriculture; Isfahan Univ. of Technology; Isfahan 84156-83111 Iran
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12
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Lantibiotics biosynthesis genes and bacteriocinogenic activity of Lactobacillus spp. isolated from raw milk and cheese. Folia Microbiol (Praha) 2012; 57:183-90. [PMID: 22447149 DOI: 10.1007/s12223-012-0113-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Accepted: 03/08/2012] [Indexed: 10/28/2022]
Abstract
Lactobacillus species are usually used as starters for the production of fermented products, and some strains are capable of producing antimicrobial substances, such as bacteriocins. Because these characteristics are highly desirable, research are continually being performed for novel Lactobacillus strains with bacteriocinogenic potential for use by food industries. The aim of this study was to characterise the bacteriocinogenic potential and activity of Lactobacillus isolates. From a lactic acid bacteria culture collection obtained from raw milk and cheese, 27 isolates were identified by 16S rDNA as Lactobacillus spp. and selected for the detection of lantibiotics biosynthesis genes, bacteriocin production, antimicrobial spectra, and ideal incubation conditions for bacteriocin production. Based on the obtained results, 21 isolates presented at least one of the three lantibiotics biosynthesis genes (lanB, lanC or lamM), and 23 isolates also produced antimicrobial substances with sensitivity to at least one proteinase, indicating their bacteriocinogenic activity. In general, the isolates had broad inhibitory activity, mainly against Listeria spp. and Staphylococcus spp. strains, and the best antimicrobial performance of the isolates occurred when they were cultivated at 25 °C for 24 or 48 h or at 35 °C for 12 h. The present study identified the bacteriocinogenic potential of Lactobacillus isolates obtained from raw milk and cheese, suggesting their potential use as biopreservatives in foods.
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Macwana SJ, Muriana PM. A 'bacteriocin PCR array' for identification of bacteriocin-related structural genes in lactic acid bacteria. J Microbiol Methods 2011; 88:197-204. [PMID: 22119852 DOI: 10.1016/j.mimet.2011.11.008] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Revised: 11/08/2011] [Accepted: 11/09/2011] [Indexed: 11/25/2022]
Abstract
Bacteriocins have been identified in many strains of lactic acid bacteria (LAB) which are a source of natural food preservatives and microbial inhibitors. Our objectives were to use a PCR array of primers to identify bacteriocin structural genes in Bac(+) LAB. DNA sequence homology at the 5'- and 3'-ends of the various structural genes indicated that non-specific priming may allow PCR amplification of heterologous bacteriocin genes. Successful amplification was obtained by real-time PCR and confirmed by melting curve and agarose gel analysis. Sequence information specific to targeted bacteriocin structural genes from the intra-primer regions of amplimers was compared to sequences residing in GenBank. The bacteriocin PCR array allowed the successful amplification of bacteriocin structural genes from strains of Lactobacillus, Lactococcus, and Pediococcus including one whose amino acid sequence was unable to be determined by Edman degradation analysis. DNA sequence analysis identified as many as 3 bacteriocin structural genes within a given strain, identifying ten unique bacteriocin sequences that were previously uncharacterized (partial homology) and one that was 100% identical to sequences in GenBank. This study provides a rapid approach to sequence and identify bacteriocin structural genes among Bac(+) LAB using a microplate bacteriocin PCR array.
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Affiliation(s)
- Sunita J Macwana
- Dept. of Animal Sci., 148 FAPC Bldg, Monroe St., Oklahoma State University, Stillwater, OK 74078-6055, USA.
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14
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Jiang F, Wang J, Kaleem I, Dai D, Zhou X, Li C. Degumming of vegetable oils by a novel phospholipase B from Pseudomonas fluorescens BIT-18. BIORESOURCE TECHNOLOGY 2011; 102:8052-8056. [PMID: 21715159 DOI: 10.1016/j.biortech.2011.05.050] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2011] [Revised: 05/01/2011] [Accepted: 05/17/2011] [Indexed: 05/31/2023]
Abstract
Pseudomonas fluorescens BIT-18 was isolated from soil near a vegetable oil factory and shown to produce a B-type phospholipase. The enzyme was partially purified by ammonium sulfate precipitation. Gas chromatography demonstrated that the enzyme preparation hydrolyzed both the 1- and 2-ester bonds of phosphatidylcholine. When degumming of soybean, rapeseed, and peanut oil was performed with this enzyme preparation, oils with phosphorous contents lower than 5mg/kg were obtained after 5h of enzyme treatment at 40°C. The enzyme preparation did not show lipase activity, thus free fatty acids were only generated from the phospholipids. Therefore, this novel phospholipase B is potentially useful for the refining of high-quality oils with attractive yields.
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Affiliation(s)
- Fangyan Jiang
- School of Life Science, Beijing Institute of Technology, 100081 Beijing, PR China
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15
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Kumar M, Srivastava S. Antilisterial activity of a broad-spectrum bacteriocin, enterocin LR/6 from Enterococcus faecium LR/6. Appl Biochem Biotechnol 2009; 162:698-706. [PMID: 19957209 DOI: 10.1007/s12010-009-8851-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2009] [Accepted: 10/29/2009] [Indexed: 10/20/2022]
Abstract
Enterocin LR/6, a purified bacteriocin, exhibited broad inhibitory spectrum both against related as well as some food-borne pathogens such as Listeria monocytogenes, Yersinia enterocolitica, Aeromonas sp., Shigella sp., and Bacillus licheniformis. In this investigation, we have focused on L. monocytogenes as the target organism, as it is not only an important pathogen but can also survive over a wide range of environmental conditions such as refrigeration temperature, low pH, and high-salt concentration. This allows the pathogen to overcome many food preservation and safety barriers and poses a potential risk to human health. The enterocin LR/6 showed a bactericidal action against L. monocytogenes and completely inhibited the growth on agar plates, supplemented with 200 AU/ml of enterocin LR/6. The effectiveness of enterocin LR/6 in completely killing a population of acid-adapted (pH 5.2, 2 h) L. monocytogenes exposed to different temperatures (4-37 degrees C), pH (2.5-8.0), and osmotic (up to 30% NaCl) stress is reported here. This paper focuses on the key issue of killing of the acid-adapted L. monocytogenes cells under adverse environmental conditions.
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Affiliation(s)
- Manoj Kumar
- Department of Genetics, University of Delhi South Campus, New Delhi 110021, India
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16
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Inhibition by Lactobacillus sakei of other species in the flora of vacuum packaged raw meats during prolonged storage. Food Microbiol 2009; 26:876-81. [DOI: 10.1016/j.fm.2009.06.003] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2009] [Revised: 05/26/2009] [Accepted: 06/04/2009] [Indexed: 11/17/2022]
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17
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Héquet A, Laffitte V, Brocail E, Aucher W, Cenatiempo Y, Frère J, Fremaux C, Berjeaud JM. Development of a new method for the detection of lactic acid bacteria capable of protecting ham against Enterobacteriaceae. Lett Appl Microbiol 2009; 48:668-74. [PMID: 19291212 DOI: 10.1111/j.1472-765x.2009.02590.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIMS Challenge trials seem to be the best assessment approach to evaluate the potency of food protective cultures. However, this method is time consuming and often difficult to implement. Here, we describe the development of the 'sequential culturing method', a new method for the screening of strains as protective cultures. METHODS AND RESULTS The sequential culturing method is based on the simulation, in a meat simulation medium (named BHI5L200), of the inhibition of Enterobacteriaceae by Lactobacillus, observed previously in situ. Results obtained with this sequential culturing method were in good agreement with those of the challenge test on sliced cooked ham and confirmed the antagonistic potency of Lactobacillus. The results obtained from the screening of 187 lactic acid bacteria (LAB) indicated that Lactobacillus sakei, Lactococcus lactis diacetylactis and Carnobacterium spp. were strong inhibitors of Enterobacteriaceae whereas Pediococcus spp., Leuconostoc spp., Weisselia spp. and other species of Lactobacillus and Lactococcus, did not possess the same inhibitory capacity. CONCLUSIONS Sequential culturing method appeared to be a useful tool to rapidly select LAB cultures which are good candidates for bioprotection of meat. SIGNIFICANCE AND IMPACT OF THE STUDY Sequential culturing method and simulating media could efficiently mimic challenge test experiments in the selection of potential protective culture for all types of food, on the condition to have the appropriate simulating media, corresponding to the food for which protective cultures were searched.
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Affiliation(s)
- A Héquet
- Laboratoire de Chimie et de Microbiologie de l'Eau, CNRS-UMR6008, IBMIG, Poitiers, France.
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Characterisation of an Antilisterial Bacteriocin Produced by Lactobacillus sakei CWBI-B1365 Isolated from Raw Poultry Meat and Determination of Factors Controlling its Production. Probiotics Antimicrob Proteins 2009; 1:75. [DOI: 10.1007/s12602-008-9000-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2008] [Accepted: 10/29/2008] [Indexed: 10/21/2022]
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Huang XF, Liu J, Lu LJ, Wen Y, Xu JC, Yang DH, Zhou Q. Evaluation of screening methods for demulsifying bacteria and characterization of lipopeptide bio-demulsifier produced by Alcaligenes sp. BIORESOURCE TECHNOLOGY 2009; 100:1358-1365. [PMID: 18799309 DOI: 10.1016/j.biortech.2008.08.004] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2008] [Revised: 08/04/2008] [Accepted: 08/05/2008] [Indexed: 05/26/2023]
Abstract
In this paper, surface tension measurement, oil-spreading test and blood-plate hemolysis test were attempted in the screening of demulsifying bacteria. After the comparison to the screening results obtained in demulsification test, 50 mN/m of surface tension of culture was proposed as a preliminary screening standard for potential demulsifying bacteria. For the identification of efficient demulsifying strains, surface tension level was set at 40 mN/m. The detected strains were further verified in demulsification test. Compared to using demulsification test alone as screening method, the proposed screening protocol would be more efficient. From the screening, a highly efficient demulsifying stain, S-XJ-1, was isolated from petroleum-contaminated soil and identified as Alcaligenes sp. by 16S rRNA gene and physiological test. It achieved 96.5% and 49.8% of emulsion breaking ratio in W/O and O/W kerosene emulsion within 24h, respectively, and also showed 95% of water separation ratio in oilfield petroleum emulsion within 2h. The bio-demulsifier was found to be cell-wall combined. After soxhlet extraction and purification through silicon-gel column, the bio-demulsifier was then identified as lipopeptide biosurfactant by TLC and FT-IR.
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Affiliation(s)
- Xiang-Feng Huang
- College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, China.
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Caro A, Humblot V, Méthivier C, Minier M, Salmain M, Pradier CM. Grafting of Lysozyme and/or Poly(ethylene glycol) to Prevent Biofilm Growth on Stainless Steel Surfaces. J Phys Chem B 2009; 113:2101-9. [DOI: 10.1021/jp805284s] [Citation(s) in RCA: 104] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Anne Caro
- Laboratoire de Réactivité de Surface, Université Pierre et Marie Curie - Paris VI - UMR CNRS 7609 - Tour 54, case 178, 4 place Jussieu, 75252 Paris Cedex 05, France, and Laboratoire de Chimie et Biochimie des Complexes Moléculaires, UMR CNRS 7576, Ecole Nationale Supérieure de Chimie de Paris, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - Vincent Humblot
- Laboratoire de Réactivité de Surface, Université Pierre et Marie Curie - Paris VI - UMR CNRS 7609 - Tour 54, case 178, 4 place Jussieu, 75252 Paris Cedex 05, France, and Laboratoire de Chimie et Biochimie des Complexes Moléculaires, UMR CNRS 7576, Ecole Nationale Supérieure de Chimie de Paris, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - Christophe Méthivier
- Laboratoire de Réactivité de Surface, Université Pierre et Marie Curie - Paris VI - UMR CNRS 7609 - Tour 54, case 178, 4 place Jussieu, 75252 Paris Cedex 05, France, and Laboratoire de Chimie et Biochimie des Complexes Moléculaires, UMR CNRS 7576, Ecole Nationale Supérieure de Chimie de Paris, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - Michel Minier
- Laboratoire de Réactivité de Surface, Université Pierre et Marie Curie - Paris VI - UMR CNRS 7609 - Tour 54, case 178, 4 place Jussieu, 75252 Paris Cedex 05, France, and Laboratoire de Chimie et Biochimie des Complexes Moléculaires, UMR CNRS 7576, Ecole Nationale Supérieure de Chimie de Paris, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - Michèle Salmain
- Laboratoire de Réactivité de Surface, Université Pierre et Marie Curie - Paris VI - UMR CNRS 7609 - Tour 54, case 178, 4 place Jussieu, 75252 Paris Cedex 05, France, and Laboratoire de Chimie et Biochimie des Complexes Moléculaires, UMR CNRS 7576, Ecole Nationale Supérieure de Chimie de Paris, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - Claire-Marie Pradier
- Laboratoire de Réactivité de Surface, Université Pierre et Marie Curie - Paris VI - UMR CNRS 7609 - Tour 54, case 178, 4 place Jussieu, 75252 Paris Cedex 05, France, and Laboratoire de Chimie et Biochimie des Complexes Moléculaires, UMR CNRS 7576, Ecole Nationale Supérieure de Chimie de Paris, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
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Dortu C, Huch M, Holzapfel WH, Franz CMAP, Thonart P. Anti-listerial activity of bacteriocin-producing Lactobacillus curvatus CWBI-B28 and Lactobacillus sakei CWBI-B1365 on raw beef and poultry meat. Lett Appl Microbiol 2009; 47:581-6. [PMID: 19120930 DOI: 10.1111/j.1472-765x.2008.02468.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIM The study aimed to evaluate the effect of the bacteriocins produced by Lactobacillus sakei CWBI-B1365 and Lactobacillus curvatus CWBI-B28 on the growth and survival of Listeria monocytogenes in raw beef and poultry meat. METHODS AND RESULTS The sakacin P and sakacin G structural genes were identified in Lact. curvatus CWBI-B28 and Lact. sakei CWBI-B1365 using PCR amplification, respectively. The effect of the two bacteriocinogenic strains either alone or together, and that of the nonbacteriocin-producing strain Lact. sakei LMG17302, on the growth of L. monocytogenes was evaluated in beef and poultry meat. In raw beef, the pathogenic bacteria were inhibited by the bacteriocinogenic strains. The bacteriocinogenic strains had no activity in raw chicken meat when inoculated separately, while they showed a clear anti-Listeria effect when applied together. CONCLUSION Sakacin G producing Lact. sakei and sakacin P producing Lact. curvatus may be applied in raw beef to inhibit L. monocytogenes. In poultry meat, the inhibition of L. monocytogenes could only be achieved by a combined application of these bacteriocin-producing strains. SIGNIFICANCE AND IMPACT OF THE STUDY In some meat products, the combined application of different class IIa bacteriocin producing lactic acid bacterium can enhance the anti-listerial activity.
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Affiliation(s)
- C Dortu
- Walloon Centre for Industrial Biology, Agricultural Gembloux University, Gembloux, Belgium.
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Hu P, Xu X, Zhou G, Han Y, Xu B, Liu J. Study of the Lactobacillus sakei protective effect towards spoilage bacteria in vacuum packed cooked ham analyzed by PCR–DGGE. Meat Sci 2008; 80:462-9. [DOI: 10.1016/j.meatsci.2008.01.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2007] [Revised: 01/17/2008] [Accepted: 01/17/2008] [Indexed: 10/22/2022]
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