I had CDiff three times. The first time, it lasted for many many months and the infectious disease doctor told me that other than taking vanco, there was nothing he could do for me. Another GI doctor suggested that instead of taking on again/off again vanco, to taper off. This did the trick and I did that with the next two episodes. I've not ha CDiff for 7 years now. It sounds like the fecal implant is something new. Sounds like it is the ticket to your horrible dilemma. Best wishes for you.