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Short Communication: Effect of Exopolysaccharide Isolated from "Viili" on the Adhesion of Probiotics and Pathogens to Intestinal Mucus

P. Ruas-Madiedo^*,,1, M. Gueimonde^*, C. G. de los Reyes-Gavilán and S. Salminen^*

^* Functional Foods Forum, University of Turku. Itäinen Pitkäkatu 4A, FIN 20014, Turku, Finland
Instituto de Productos Lácteos de Asturias (CSIC), Carretera de Infiesto s/n, 33300 Villaviciosa, Asturias, Spain

¹ Corresponding author: ruas-madiedo{at}ipla.csic.es

The strong ropy character of the Scandinavian fermented milk viili is conferred by the exopolysaccharides (EPS) produced by lactococcal strains. These biopolymers can be responsible for some health benefits. We have assessed the influence of the EPS fraction isolated from commercial viili on the adhesion of some probiotics and pathogens to human intestinal mucus. Concentrations of viili EPS greater than 0.1 mg/mL promoted a decrease in adherence of Bifidobacterium lactis Bb12 and Lactobacillus rhamnosus GG and this effect was dose-dependent. However, no modifications were detected on the adhesion levels of the pathogenic strains tested at a concentration of 1 mg/mL of EPS. Results obtained in the present work should be considered in the design of new probiotic products.

Key Words: exopolysaccharide • adhesion • probiotic • intestinal mucus

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