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Registros recuperados: 8
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A Lactobacillus rhamnosus strain induces protection in different sites after Salmonella enterica subsp. enterica serovar Typhimurium challenge in gnotobiotic and conventional mice Arq. Bras. Med. Vet. Zootec.
Mendonça,A.H.; Cerqueira,M.M.O.P.; Nicoli,J.R.; Sousa,S.M.M.; Nardi,R.M.D.; Souza,F.N.; Fonseca,L.M.; Leite,M.O.; Arantes,R.M.E..
The ability of a Lactobacillus rhamnosus strain isolated from a healthy breast-fed human newborn to reduce the pathological consequences for the host due to an experimental oral infection with Salmonella enterica subsp. enterica serov. Typhimurium in vivo was determined using gnotobiotic and conventional mice. Conventional mice received 0.1mL probiotic milk (8.0 log colony-forming unit) daily for 10 days before the oral pathogenic challenge (5.0 log colony-forming unit). Then probiotic treatment was continued until the end of the experiment. Probiotic treatment in germ-free mice consisted of a single dose of the probiotic milk at the beginning of the experiment and a challenge with S. Typhimurium 10 days later (3.0 log colony-forming unit). A protective...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Intestinal infection; Lactobacilli; Probiotics; Salmonella.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000200004
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Aminotransferase and glutamate dehydrogenase activities in lactobacilli and streptococci BJM
Peralta,Guillermo Hugo; Bergamini,Carina Viviana; Hynes,Erica Rut.
ABSTRACT Aminotransferases and glutamate dehydrogenase are two main types of enzymes involved in the initial steps of amino acid catabolism, which plays a key role in the cheese flavor development. In the present work, glutamate dehydrogenase and aminotransferase activities were screened in twenty one strains of lactic acid bacteria of dairy interest, either cheese-isolated or commercial starters, including fifteen mesophilic lactobacilli, four thermophilic lactobacilli, and two streptococci. The strains of Streptococcus thermophilus showed the highest glutamate dehydrogenase activity, which was significantly elevated compared with the lactobacilli. Aspartate aminotransferase prevailed in most strains tested, while the levels and specificity of other...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aminotransferase activity; Glutamate dehydrogenase activity; Lactobacilli; Streptococci.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000300741
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Antimicrobial activity of lactic acid bacteria and the spectrum of their biopeptides against spoiling germs in foods BABT
Djadouni,Fatima; Kihal,Mebrouk.
The objective of this study was to isolate LAB from dairy, meat products and agro-industrial wastes and to investigate their antagonist activity. A total of 141 isolates were screened for the inhibitory effect on ten indicator strains in the agar spot test. Results showed that strain LBbb0141 contained antimicrobial compound with wide spectrum that inhibited the growth of ten indicator Gram-positive and Gram-negative strains. The bacteriocin activity attained its maximum value using the MRS agar at initial pH 7.5 and 30°C incubation temperature.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lactobacilli; Enterocoquess; Leuconostoc sp; Bacteriocins activities; Indicators microorganisms; Listeria innovii; Growth media; PH; Temperature.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000300015
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Bile Salt Hydrolase Activities: A Novel Target to Screen Anti-Giardia Lactobacilli? ArchiMer
Allain, Thibault; Chaouch, Soraya; Thomas, Myriam; Travers, Marie-agnes; Valle, Isabelle; Langella, Philippe; Grellier, Philippe; Polack, Bruno; Florent, Isabelle; Bermudez-humaran, Luis G..
Giardia duodenalis is a protozoan parasite responsible for giardiasis, a disease characterized by intestinal malabsorption, diarrhea and abdominal pain in a large number of mammal species. Giardiasis is one of the most common intestinal parasitic diseases in the world and thus a high veterinary, and public health concern. It is wellestablished that some probiotic bacteria may confer protection against this parasite in vitro and in vivo and we recently documented the implication of bile-salt hydrolase (BSH)-like activities from strain La1 of Lactobacillus johnsonii as mediators of these effects in vitro. We showed that these activities were able to generate deconjugated bile salts that were toxic to the parasite. In the present study, a wide collection of...
Tipo: Text Palavras-chave: Giardia duodenalis; Lactobacilli; Lactobacillus johnsonii; Lactobacillus gasseri; Probiotics; Bile salt hydrolases.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00424/53569/54417.pdf
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Deconjugated Bile Salts Produced by Extracellular Bile-Salt Hydrolase-Like Activities from the Probiotic Lactobacillus johnsonii La1 Inhibit Giardia duodenalis In vitro Growth ArchiMer
Travers, Marie-agnes; Sow, Cisse; Zirah, Severine; Deregnaucourt, Christiane; Chaouch, Soraya; Queiroz, Rayner M. L.; Charneau, Sebastien; Allain, Thibault; Florent, Isabelle; Grellier, Philippe.
Giardiasis, currently considered a neglected disease, is caused by the intestinal protozoan parasite Giardia duodenalis and is widely spread in human as well as domestic and wild animals. The lack of appropriate medications and the spread of resistant parasite strains urgently call for the development of novel therapeutic strategies. Host microbiota or certain probiotic strains have the capacity to provide some protection against giardiasis. By combining biological and biochemical approaches, we have been able to decipher a molecular mechanism used by the probiotic strain Lactobacillus johnsonii La1 to prevent Giardia growth in vitro. We provide evidence that the supernatant of this strain contains active principle(s) not directly toxic to Giardia but able...
Tipo: Text Palavras-chave: Giardiasis; Lactobacilli; Probiotics; Microbiota; Bile salts; Anti-giardial activity; Choloylglycine bile acid hydrolase.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00351/46211/45906.pdf
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Growth kinetic models of five species of Lactobacilli and lactose consumption in batch submerged culture BJM
Rezvani,Fazlollah; Ardestani,Fatemeh; Najafpour,Ghasem.
Abstract Kinetic behaviors of five Lactobacillus strains were investigated with Contois and Exponential models. Awareness of kinetic behavior of microorganisms is essential for their industrial process design and scale up. The consistency of experimental data was evaluated using Excel software. L. bulgaricus was introduced as the most efficient strain with the highest biomass and lactic acid yield of 0.119 and 0.602 g g-1 consumed lactose, respectively. The biomass and carbohydrate yield of L. fermentum and L. lactis were slightly less and close to L. bulgaricus. Biomass and lactic acid production yield of 0.117 and 0.358 for L. fermentum and 0.114 and 0.437 g g-1 for L.actobacillus lactis were obtained. L. casei and L. delbrueckii had the less biomass...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacterial growth; Exponential kinetic model; Contois model; Lactobacilli.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000200251
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L(+)-Lactic acid recovery from cassava bagasse based fermented medium using anion exchange resins BABT
John,Rojan P.; Nampoothiri,K. Madhavan; Pandey,Ashok.
The properties of the ion exchange resins, Amberlite IRA 402, a strong anion exchange resin and IRA 67, a weak anion exchange resin were determined to evaluate their comparative suitability for lactic acid recovery from fermented cassava bagasse. Data on binding capacities and recovery proved that weak base resin in chloride form was the most favourable ones for lactic acid recovery from aqueous solutions and fermentation media. Fermented media obtained through simultaneous saccharification and fermentation of cassava bagasse starch hydrolysate based medium were used for lactic acid recovery study using weak base resin column. Amberlite IRA 67 had much more efficiency than Amberlite IRA 402 to recover lactic acid. Like in other reports, due to the presence...
Tipo: Info:eu-repo/semantics/article Palavras-chave: L(+) lactic acid; Lactobacilli; Anion exchage resin; Cassava bagasse.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000600020
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The effect of modified citrus pectin-probiotic on faecal lactobacilli in Balb/c mice Ciênc. Tecnol. Aliment.
ODUN-AYO,Frederick; MELLEM,John; REDDY,Lalini.
Abstract Intestinal bacteria utilize the constituent of ingested food for their metabolic activities making the gut microbiota a target in the modification of functional foods. This study examines the effect of modified citrus pectin and encapsulated probiotic, Lactobacillus acidophilus ATCC 4356 on colon lactobacilli microbiota in healthy Balb/c mice. Mice were orally administered once daily with modified citrus pectin alginate probiotic, alginate calcium probiotic, modified citrus pectin and water for 28 days. Faecal lactobacilli count were determined using automated colony counter Doc-It® imaging station. The number of faecal lactobacilli in the modified citrus pectin alginate probiotic-treated mice significantly increased at day 7, 14 and 28 [7.99 ±...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Modified citrus pectin; Supplements; Lactobacilli; Microbeads.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000300478
Registros recuperados: 8
Primeira ... 1 ... Última
 

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