Inclusion Criteria:  Recipients of deceased donor kidney transplantation over 18 years of age, able to understand the informed consent form and who have agreed to participate in the study. Only patients with low immunological risk, whose induction for kidney transplantation was performed with basiliximab will be included, regardless of the maintenance immunosuppression combination  Exclusion Criteria:  Recipients of deceased donor kidney transplant with high immunological risk (within the PATHI kidney transplant program). Kidney transplant recipients receiving pretransplant induction with thymoglobulin or polyclonal lymphocyte antiglobulin agents. Living donor kidney transplant recipients. Patients with a history of intestinal pathology such as: ulcerative colitis, Crohn's disease or malabsorptive syndrome or irritable colon prior to their inclusion in the kidney transplant waiting list. Patients with dysphagia, history of aspiration pneumonia or neutropenia prior to transplantation. Patients who, even if they meet the inclusion criteria, upon analysis of pretransplant stool, are found to be carriers of enterotoxigenic or potentially pathogenic strains such as Clostridioides difficile, or multiresistant bacteria (BLEE and/or carbapenemase-producing).