Enteral compositions containing Streptococcus thermophilus, Bifidobacterium infantis and Bifidobacterium longum, each at a concentration equal to or greater than 1.times.10.sup.11 CFU per gram, are useful as adjuncts for enteral formulations and as oral nutritional supplements. The compositions can be administered before, during or at the end of an enteral formulation administration. The compositions can be administered separately or mixed with the enteral formulation. The compositions can also be employed at the end of the daily administration in order to prevent the colonization of the enteral tube by the other pathogens. The compositions can also be used as supplement to any liquid, creamy or pasty foodstuff.The present invention relates to a kit comprising two containers, one containing a foodstuff and the other containing the enteral composition consisting of Streptococcus thermophilus, Bifidobacterium infantis and Bifidobacterium longum.