At Visit 1, before FMT(fecal microbial transplantation), patients will be evaluated for their vital signs, medical history and concomitant medications. Also before transplantation, patient's stool will be collected to study their microbial profile, blood collected for analysis to evaluate cytokines levels as well as blood DNA bacteria and finally, urinalysis to assess gut permeability (baseline). Other assessments (prior to the first dose of therapy) include an Expanded Disability Status Scale (EDSS), pregnancy test (if applicable), physical exam and ECG. Blood samples are also taken at month 1 in order to establish a baseline for routine chemistry/hematology. After all these assessments FMT will be performed by a trained nurse via a rectal enema.