Bacteriocin Production
Mostrando 13-24 de 262 artigos, teses e dissertações.
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13. Antagonistic activity expressed by Shigella sonnei: identification of a putative new bacteriocin
Bacteriocins are antibacterial, proteinaceous substances that mediate microbial dynamics. Bacteriocin production is a highly disseminated property among all major lineages of bacteria, including Shigella. In this paper, we addressed the purification and characterisation of a bacteriocin produced by a Shigella sonnei strain (SS9) isolated from a child with ac
Mem. Inst. Oswaldo Cruz. Publicado em: 2013-09
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14. Molecular identification of Lactobacillus spp. associated with puba, a Brazilian fermented cassava food
Puba or carimã is a Brazilian staple food obtained by spontaneous submerged fermentation of cassava roots. A total of 116 lactobacilli and three cocci isolates from 20 commercial puba samples were recovered on de Man, Rogosa and Sharpe agar (MRS); they were characterized for their antagonistic activity against foodborne pathogens and identified taxonomicall
Braz. J. Microbiol.. Publicado em: 19/03/2013
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15. An evaluation and partial characterization of a bacteriocin produced by Lactococcus lactis subsp lactis ST1 isolated from goat milk
A bacteriocin-like inhibitory substance producing Lactococcus lactis subsp lactis strain, ST1, isolated from goat milk of Iranian origin and with broad spectrum of activity and desirable technical properties was used for evaluating some futures of bacteriocin inhibitory activity. Cell growth and bacteriocin production studies were carried out in MRS medium i
Braz. J. Microbiol.. Publicado em: 2012-12
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16. Are we ready for caries prevention through bacteriotherapy?
Recent insights in medical science indicate that human biofilms play an important role in health and well-being, and have put microbiota modulation through bacteriotherapy into focus. In dentistry, bacterial interference with probiotic bacteria to support the stability and diversity of oral biofilms has gained similar interest. Investigations in vitro into m
Braz. oral res.. Publicado em: 2012
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17. Produção de nisina em leite desnatado diluído por Lactococcus lactis subsp. lactis ATCC 11454 em biorreator / Nisin production in diluted skimmed milk utilizing Lactococcus lactis subsp. lactis ATCC 11454 in bioreactor
Nisin is a natural antimicrobial peptide produced by Lactococcus lactis subsp. lactis ATCC 11454 during its exponential growth phase. The bacteriocin is used as natural food preservative due to its antimicrobial activity against Gram-positive bacteria and outgrowth of spores. This property allows its application in numerous fields (pharmaceutical, veterinary
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/03/2011
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18. Caracterização de fatores interferentes na produção de bacteriocinas por Bactérias Ácido Láticas isoladas de leite cru e queijo / Characterization of interfering factors in the bacteriocin production by lactic acid bacteria isolated from raw milk and cheese
Bactérias ácido láticas (BAL) são constituintes naturais da microbiota do leite cru, exercendo importante papel na segurança alimentar, devido ação antimicrobiana sobre microrganismos deteriorantes e patógenos, como Listeria monocytogenes e Staphylococcus aureus. Várias espécies de BAL já foram isoladas e identificadas como produtoras de diversas
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/02/2011
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19. Identificação molecular de bactérias ácido láticas isoladas de leite cru e queijo, e pesquisa de genes de bacteriocinas / Molecular identification of lactic acid bacteria isolated from raw milk and cheese, and detection of bacteriocin genes
Considering the importance of the lactic acid bacteria (LAB) as biopreservatives, and their inhibitory potencial against pathogens and spoilage microrganisms, the aim of this study was identify using molecular methodologies LAB isolates obtained from raw milk and soft cheese, and to conduct a detailed study about the presence of bacteriocin codifying genes.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/02/2011
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20. Synergistic growth effect among bacteria recovered from root canal infections
The objective of this study was to determine the ecological relationships between bacterial species that colonize infected root canals. Root canal bacteria recovered from one patient with pulp canal necrosis were evaluated in vitro for synergistic and antagonistic activities determined by mono and co-culture growth kinetics and the production of bacteriocin-
Brazilian Journal of Microbiology. Publicado em: 2011-09
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21. Optimization of media components for enhanced production of streptococcus phocae pi80 and its bacteriocin using response surface methodology
The standard MRS components were optimized using response surface methodology for increasing yield of Streptococcus phocae PI80 viable cells and its bacteriocin. The highest amounts of bacteriocin activity and viable cells were recorded from prediction point of optimized MRS medium and achieved two fold higher (33049.8 AU.mL-1 and 14.05 LogCFU.mL-1) than un-
Brazilian Journal of Microbiology. Publicado em: 2011-06
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22. Production of bacteriocin-like substances by lactic acid bacteria isolated from regional ovine cheese
Lactic acid bacteria (LAB) were isolated from ovine milk and cheeses manufactured in the South Region of Brazil. Among 112 bacterial isolates investigated, 59 were chosen through a screening for LAB. Among these 59 strains of LAB, 21% showed antimicrobial, proteolytic and lipolytic activities. Based on this screening, Lactobacillus plantarum LCN 17 and Lacto
Brazilian Journal of Microbiology. Publicado em: 2010-12
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23. Bacteriocins produced by L. fermentum and L .acidophilus can inhibit cephalosporin resistant E .coli.
Reemerging infections occur due to resistant bacteria. Such infections create restrictions for clinicians and microbiologists in drug selection. Such problems demand new strategies for solution. Use of bacteriocins for this purpose may be fruitful. In the present research work, the inhibitory effects of bactericins on cephalosporin resistant Escherichia coli
Brazilian Journal of Microbiology. Publicado em: 2010-10
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24. Fatores que interferem na produção de bovicina HC5 e obtenção de mutantes não produtores de bacteriocina / Factors that affect bovicin HC5 production and isolation of nonbacteriocin producing mutants
Neste trabalho objetivou-se analisar os fatores que interferem na produção de bovicina HC5 por Streptococcus bovis HC5 e obter mutantes não produtores de bacteriocina. S. bovis HC5 cresceu e produziu bovicina HC5 utilizando várias fontes de carbono e nitrogênio. A maior atividade específica de bovicina HC5 (AU ml-1 mg de massa seca celular-1) foi obtid
Publicado em: 2009