Potential probiotic properties of Lactobacilli isolated from goat´s milk
The three strains of lactobacilli isolated from goat's milk - Lactobacillus (Lbc.) casei 21L10, Lbc. johnsonii KB2-1 and Lbc. plantarum 25/1L were selected in previous studies because they showed good processing and protective properties in production of cheeses or lactic acid beverages from he...
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Published in | Potravinarstvo Vol. 9; no. 1; pp. 66 - 71 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
HACCP Consulting
04.05.2015
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Subjects | |
Online Access | Get full text |
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Summary: | The three strains of lactobacilli isolated from goat's milk - Lactobacillus (Lbc.) casei 21L10, Lbc. johnsonii KB2-1 and Lbc. plantarum 25/1L were selected in previous studies because they showed good processing and protective properties in production of cheeses or lactic acid beverages from heat-treated milk or in model conditions. The aim of this study was to evaluate their potential probiotic properties: resistance to lysozyme, survival in gastrointestinal tract, and hydrophobicity. Testing was carried out in vitro methods: comparison of growth and metabolic characteristics of the strains when cultivated in Man, Rogosa and Sharpe medium with and without the addition of lysozyme (400 mg.mL-1)
viability of strains after incubation in simulated environment of gastric juice (pH = 2.0, pepsin) and subsequently in simulated small intestinal juice (pH = 8.0, pancreatin, bile salts) and an ability to adhere to the non-polar solvent in the two-phase system: xylene-water. Lbc. casei 21L10 and Lbc. johnsonii KB2-1 were resistant to the effect of lysozyme, the strain Lbc. plantarum 25/1L was moderately susceptible. To the action of simulated gastric juice was resistant only the Lbc. johnsonii KB2-1, that was subsequently inhibited in simulated small intestinal juice. When using xylene as a model agent, all strains were not hydrophobic. From all the tested strains, Lbc. johnsonii KB2-1 showed good potential probiotic properties, particularly in relation to resistance to lysozyme and the simulated environment of gastric juice. |
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Bibliography: | Q04 http://www.potravinarstvo.com/journal1/index.php/potravinarstvo/article/view/434/pdf |
ISSN: | 1337-0960 1337-0960 |
DOI: | 10.5219/434 |