The subject of the present invention is a bacterial composition having immunomodulation properties comprising at least one strain selected from the group consisting of Lactobacillus acidophilus PTA-4797, Lactobacillus plantarum PTA-4799, Lactobacillus salivarius PTA-4800, Lactobacillus paracasei PTA-4798, Bifidobacterium bifidum PTA-4801 and Bifidobacterium lactis PTA-4802. An other subject of the invention is an immunomodulation method comprising the step of using the at least one strain selected from the preceding group.