“The Food and Drug Administration has ordered clinicians to stop transplanting healthy fecal matter from one patient to another until the agency has had a chance to review and test the procedure. When stool containing healthy bacteria is introduced into the system, many patients are finally getting relief from chronic C. diff infections, which physicians point to as reason enough to continue the procedure. The agency said in a press release, that ‘the efficacy of this intervention has not yet been demonstrated in controlled clinical trials. Such controlled trials are needed to demonstrate the safety and effectiveness of FMT products for C. difficile infection.'”
http://www.rawstory.com/rs/2013/05/15/fda-halts-u-s-poop-transplants-pending-further-review/