1. Lactobacillus paracasei NCC 2461 (ST11) for use by administration to pregnant women and, if necessary, they also postpartum lactation and children born to mothers of said attenuation or prevention of allergic immune responses in these detey.2. Lactobacillus paracasei NCC 2461 (ST11) according to claim. 1, in which for these children are at risk of atopic zabolevaniy.3. Lactobacillus paracasei NCC 2461 (ST11) according to Claim. 1 or 2, wherein the allergic immune reactions occur in response to allergens contained in foods and / or air, in particular allergens of birch pollen Bet v 1 and Bet v 2 and / or food allergens, allergen cross-reactive with trees, namely with the birch pollen allergen Bet v 1 and Bet v 2.4. Lactobacillus paracasei NCC 2461 (ST11) according to Claim. 1 or 2, wherein the allergic immune response can be a secondary immune response specific for an allergen, or the immune response is not specific for allergena.5. Lactobacillus paracasei NCC 2461 (ST11) according to Claim. 1 or 2, wherein the attenuation of said allergic immune responses in these children are (i) decrease in the production of interleukins 4 and 5 (IL-4, IL-5) in the case of a secondary immune response specific against an allergen, and / or (ii) decrease in the production of interleukin 5 (IL-5) in the case of immune response is not specific for the allergen, and these immune responses are weakened compared to children of mothers who were not receiving ST11.6. Lactobacillus paracasei NCC 2461 (ST11) according to Claim. 1 or 2, wherein the ST11 administered to expectant mothers for at least two weeks before delivery and after delivery to their children, either directly or through the mothers milk for at least 2 months, preferably up to six n months1. Lactobacillus paracasei NCC 2461 (ST11) для применения путем введения беременным женщинам и, при необходимости, им же после родов в период грудного вскармливания и родившимся детям указанных матерей для ослабления или предотвращения р
