1. Composition containing B.longum NCC 2705, Depository Number CNCM 1-2618, for use in the treatment or prevention of infections and disorders associated with the immune system, including infections. The composition of claim 1, wherein B.longum NCC 2705 CNCM 1-2618 is rendered at least partially in a non-replicating state by thermal inactivation, preferably by treatment, at least at about 70 ° C. The composition according to claim 2, in which the heat treatment is carried out for at least 10 s. The composition according to claim 1, in which B.longum NCC 2705 CNCM I-2618 is brought into a non-replicating state with a temperature of 110 ° C to 140 ° C for 10-20 s or a temperature of 75 ° C to 95 ° C for 10- 30 min. 5. The composition according to claim 1, which contains the number of non-replicating B.longum NCC 2705 CNCM 1-2618, corresponding to a range of from about 10 to 10 CFU per daily dose. The composition according to claim 1, which contains about 0.005-1000 mg of non-replicating B.longum NCC 2705 CNCM 1-2618 per daily dose. The composition of claim 1, wherein at least 95% of B.longum NCC 2705 CNCM 1-2618 are non-replicating, preferably all B.longum NCC 2705 CNCM 1-2618 are non-replicating. The composition according to any one of the preceding paragraphs, which is selected from the group consisting of food compositions, food products, including pet food, drinks, dietary mixtures, nutritional mixtures, nutraceuticals, dietary supplements, pharmaceutical compositions, cosmetic compositions, compositions for topical application and medicines. 9. The composition according to claim 1, in which the disorder associated with the immune system is selected from the group consisting of infections, in particular bacterial, viral, fungal and / or parasitic inf1. Композиция, содержащая B.longum NCC 2705, депозитарный номер CNCM 1-2618, для применения при лечении или при профилактике инфекций и расстройств, связанных с иммунной системой, включая инфекции.2. Композиция по п.1,
