I found this interesting.
A modified form of fecal bacteriotherapy (Autologous Restoration of Gastrointestinal Flora - ARGF) that is safer, more effective, and easier to administer is being developed. An autologous faecal sample, provided by the patient before medical treatment, is stored in a refrigerator. Should the patient subsequently develop C. difficile, the sample is extracted with saline and filtered. The filtrate is freeze-dried and the resulting solid enclosed in enteric-coated capsules. Administration of the capsules will restore the patient's own colonic flora and combat C. difficile. This procedure will avoid the hazards of standard FB, where infection from the donor could be transmitted to the patient and the requirement to deliver faecal samples into the duodenum via a nasal probe.
This would be way better than having to use a donor sample.