“…while research to date shows fmt to be safe and effective, experts note that studies haven't yet been done to determine what long-term risks of fmt could be. "None of us want to do any harm to the patients, and I think that's the one thing that's just kind of in the back of our minds is we don't have really long-term data," Parian says.
The primary known risk is passing along disease or infection in stool. "The stool can have microscopic amounts of blood in it. So we really treat it like a regular organ transplant," Parian says. "So we test them for really everything that could be passed with the blood as well as within the stool. Of course we make sure to screen all the donors." Or she adds they use stool purchased from a non-profit stool bank called OpenBiome, just outside of Boston, that carefully screens donors, and provides liquefied stool preparations to clinicians and researchers for fmt.”
Read more: https://health.usnews.com/health-care/patient-advice/articles/2018-03-13/fecal-transplant-increasingly-seen-as-an-option-to-treat-a-nasty-superbug