THIS INVENTION RELATES TO A PREPARATION COMPRISING A PROBIOTIC BACTERIAL STRAIN AND A PREBIOTIC MIXTURE COMPRISING 5-70 WT% OF AT LEAST ONE N-ACETYLATED OLIGOSACCHARIDE SELECTED FROM THE GROUP COMPRISING GaINAc l,3Galβl,4Glc AND Galβl,6GaINAc l,3Galβl,4Glc, 20-95 WT% OF AT LEAST ONE NEUTRAL OLIGOSACCHARIDE SELECTED FROM THE GROUP COMPRISING Galβl,6Gal, Galβl,6Galβl,4Glc Galβl,6Galβl,6Glc, Galβl,3Galβl,3Glc, Galβl,3Galβl,4Glc, Galβ l,6Galβ l, 6Galβ l,4GIc, Galβ l,6Galβ l,3Galβ l 1,4GIc Galβ l,3Galβ l,6Galβ l,4GIc AND Galβl,3 Galβl,3 Galβl, 4Glc AND 2-50 WT% OF AT LEAST ONE SIALYLATED OLIGOSACCHARIDE SELECTED FROM THE GROUP COMPRISING NeuAc 2,3Galβl,4Glc AND NeuAc 2,6Galβl,4Glc. THE INVENTION EXTENDS TO FOOD PRODUCTS COMPRISING SAID PREPARATION AND TO THE USE OF THE PREPARATION IN THE PREVENTION AND TREATMENT OF INFECTIONS.
