Assessment of the effect of stress-tolerance acquisition on some basic characteristics of specific probiotics
International Journal of Food Microbiology(2013)
Abstract
The production of viable functional probiotics presupposes stability of strain features in the final product. We evaluated the impact of acquisition of heat-tolerance and subsequent freeze-drying on the adhesion properties of Lactobacillus rhamnosus GG, Lactobacillus casei Shirota, Bifidobacterium lactis Bb-12 and Bifidobacterium animalis IF20/1 and on their ability to inhibit the adhesion of pathogens in a mucus model. Both fresh and freeze-dried cultures were evaluated. Significant differences were observed between fresh, freeze dried, fresh heat-tolerant and freeze dried heat-tolerant strains, especially in the ability of the freeze dried probiotics to exclude, displace or outcompete pathogens.
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Key words
Probiotics,Adhesion,Heat-tolerant,Exclude,Displace,Outcompete
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