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1 Polish Journal of Microbiology

1 2017

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Physiological effects of whey- and milk-based probiotic yogurt in rats

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Szabo-Fodor J. , Bonai A. , Bota B. , Egyed L. S. , Lakatos F. , Papai G. , Zsolnai A. , Glavits R. , Horvatovich K. , Kovacs M.

Polish Journal of Microbiology

2017

tom 66

nr 4

In an in vitro experiment commercially available probiotic products were tested for the survival of bacteria under conditions of simulated human digestion either when used alone or mixed into yogurt. In the in vivo experiment the effects of feeding a whey- and milk-based yogurt prepared with the probiotic strain showing adequate survival in the in vitro experiment, was measured on body weight, feed consumption and immune response of rats (IgG and IgA level after immunisation), on the composition and volatile fatty acid production of the intestinal microbiota and on the structure of intestinal villi. The Lactobacillus acidophilus (LA-15) strain had inadequate surviving ability in rats. Bifidobacterium animalis ssp. lactis (BB-12) improved the composition of the intestinal microflora, whereas whey-containing product had a mild immunostimulating effect and exerted a favourable influence on the morphology of intestinal villi. The consumption of yogurts increased the depth of crypts in the ileum, which resulted in enhanced secretion and thus softer faeces.