1. A bacterial species of Roseburia hominis for use in regulating a subject's immune system. 2. The bacterial species of claim 1 for use in regulating a subject's adaptive immune system. 3. The bacterial species of claim 1 for use in regulating a subject's innate immune system. A bacterial species of Roseburia hominis for use in maintaining immune homeostasis in a subject. 5. A bacterial species of Roseburia hominis for use in treating a disorder selected from an inflammatory disorder, an immune disorder, and an intestinal disorder in a subject. 6. The bacterial species for use according to claim 5, in which the disorder is selected from irritable bowel syndrome (IBS), colitis, inflammatory bowel disorder (IBD), including Crohn's disease and ulcerative colitis, inflammation of the intestinal tract created by surgery, functional dyspepsia functional constipation, functional diarrhea (including diarrhea associated with taking antibiotics, diarrhea of travelers and diarrhea in children), functional pain in the abdomen, functional distention, pain oma in the epigastric region, postprandial distress syndrome, gastroesophageal reflux disease (GERD), autoimmune diseases such as diabetes mellitus, rheumatoid arthritis, multiple sclerosis and psoriasis, allergies, celiac disease, atopic diseases, atopic dermatitis, other dermatitis, rheumatoid dermatitis, rheumatoid dermatitis, and other atopic dermatitis, rheumatoid dermatitis, rheumatoid dermatitis, and other atopic dermatitis infectious diseases and their combinations. 7. A bacterial species of Roseburia hominis for use to improve intestinal microbiota in a subject. 8. Bacterial species Roseburia hominis for use in regulating appetite1. Бактериальный вид Roseburia hominis для применения для регуляции иммунной системы субъекта.2. Бактериальный вид по п. 1 для применения для регуляции адаптивной иммунной системы субъекта.3. Бактериальный вид по п. 1 для применения для регуляции врожденной иммунной системы субъекта.4. Бактер
