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The interactions of the probiotics Bacillus subtilis, Lactococcus lactis and Lactobacillus plantarum with the yeast Saccharomyces cerevisiae were examined in terms of probiotic and biochemical characteristics. Yeast supernatant had a positive effect on the aggregation biofilm formation capacity and hydrophobicity of probiotics, and resulted in increased lactic acid levels, reduced pH values as well as lower RS and FAN levels of probiotics. The effect of probiotics supernatants on yeast was more complex but best results were obtained in the yeast: probiotic CFS ratio of 1:2 for B. subtilis and of 2:1 for the other probiotics. The observed effects depended on the volume ratio of the cell free supernatant to the culture it was applied on. Best results were obtained by the volume ratio probiotic: yeast of (2:1) for B. subtilis and of (1:2) probiotic: yeast for L. plantarum and L. lactis. These ratios were used for further evaluation in vitro against V. anguillarum, resulting in reduced survival and attachment properties of the pathogen. Moreover, the administration of the corresponding combination of bacteria and yeast to Artemia nauplii greatly improved their survival following a challenge with the pathogen. Our results demonstrate that yeast enhances the protective effect of probiotics in a strain specific manner.
This article was published in the following journal.
Name: Microbial pathogenesis
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A species of Bifidobacterium that occurs in the human GASTROINTESTINAL TRACT and VAGINA. It inhibits the growth of pathogenic bacteria, may modulate the immune response, and is used as a PROBIOTIC.
A non-pathogenic, obligate aerobic, Gram-negative species of Bdellovibrio that occurs in water and soil, as well as the intestines of birds and mammals. It can infect and lyse pathogenic GRAM-NEGATIVE BACTERIA and can function as a PROBIOTIC and ANTI-BACTERIAL AGENT.
Screening techniques first developed in yeast to identify genes encoding interacting proteins. Variations are used to evaluate interplay between proteins and other molecules. Two-hybrid techniques refer to analysis for protein-protein interactions, one-hybrid for DNA-protein interactions, three-hybrid interactions for RNA-protein interactions or ligand-based interactions. Reverse n-hybrid techniques refer to analysis for mutations or other small molecules that dissociate known interactions.
A species of Bifidobacterium present in the human GUT MICROBIOTA. It is used as a PROBIOTIC.
A species of Saccharomyces that is used as a PROBIOTIC, such as in the treatment of DIARRHEA and PSEUDOMEMBRANOUS ENTEROCOLITIS associated with CLOSTRIDIUM INFECTIONS.