The present Invention relates to the use of bacterial strains belonging to the species Lactobacillus kefiri in pediatrics to create and / or maintain a State of homeostasis.The present Invention further refers to bacterial strains belonging to the species Lactobacillus kefiri has a High Ability to adhere to intestinal epithelium； in particular,The present Invention relates to bacterial strains Lactobacillus and Lactobacillus lkef 32079 kefiri lkf01 DSM DSM kefiri lkf02 52285 for Paediatric use.Finally, the present Invention relates to a Food Composition or composition for a fee, or a composition for a Medical DeviceA Pharmaceutical composition or (in short, All the compositions of the present Invention comprises excipients and / or Substances of a food or Pharmaceutical Grade formulation,And a mixture comprising or, alternatively, is a bacterial Strain selected from the group consisting of bacterial strains belonging to the species Lactobacillus kefiri,The composition for use in pediatrics to create and / or maintain a State of homeostasis and for use in Preventive and / or curative Treatment of inflammatory bowel diseases.Such as irritable bowel syndrome (IBS), Inflammatory Bowel Disease (IBD), Crohn's disease and ulcerative colitis (UC) in adult subjects, also in the chronic stage.La presente invención se refiere al uso de cepas bacterianas pertenecientes a la especie Lactobacillus kefiri en pediatría para generar y/o mantener el estado de homeostasis. La presente invención se refiere además a cepas bacterianas que pertenecen a la especie Lactobacillus kefiri que tiene una alta capacidad para adherirse al epitelio intestinal； en particular, la presente invención se refiere a las cepas bacterianas Lactobacillus kefiri LKF01 DSM 32079 LKEF y Lactobacillus kefiri LKF02 DSM 32080 para uso en pediatría. Finalmente, la presente invención se refiere a una composición alimenticia, o una composición para un suplemento, o una composición para un dispositivo médico, o un
