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 Ga1NAcα1,3Ga1β1,4G1c and Ga1β1,6Ga1NAcα1,3Ga1β1,4G1c, 20-95 wt % of at least one neutral oligosaccharide selected from the group comprising Ga1β1,6Ga1, Ga1β1,6Ga1β1,4G1c Ga1β1,6Ga1β1,6G1c, Ga1β1,3Ga1β1,3G1c, Ga1β1,3Ga1β1,4G1c, Ga1β 1,6Ga1β 1,6Ga1β 1,4GIc, Ga1β 1,6Ga1β 1,3Ga1β 1,4GIc Ga1β 1,3Ga1β 1,6Ga1β 1,4GIc and Ga1β1,3Ga1β1,3Ga1β1,4G1c and 2-50 wt % of at least one sialylated oligosaccharide selected from the group comprising NeuAcα2,3Ga1β1,4G1c and NeuAcα2,6Ga1β1,4G1c. The invention extends to food products comprising said preparation and to the use of the preparation in the prevention and treatment of infections.
