Hi
@ruben. It's a good idea to spell out uncommon abbreviations initially, as not everyone may be familiar with them:
FMT = fecal microbiota transplant, aka: bacteriotherapy.
To answer your question, I have not heard of family donors providing a higher success rate, but I would be interested in learning more, if you can provide a link to where you saw these accounts.
But it may have nothing to do with being a family member; success on the second attempt might be a result of receiving a different spectrum of intestinal bacteria from a different donor. Each person has their own unique microbiota.
And even with the same donor, bacteriotherapy for ME/CFS may fail the first time, but work the second time:
Have a look at
Dr Thomas Borody's study on bacteriotherapy for ME/CFS. This study involved 60 ME/CFS patients (most of whom had two bacteriotherapy infusions: one transcolonoscopic infusion, and then on the next day, one rectal infusion). However, 15 out of these 60 ME/CFS patients failed to respond to this bacteriotherapy.
Out of those 15 who failed to respond, 10 of these were given bacteriotherapy once again, and 7 out of these 10 then responded to bacteriotherapy on the second attempt. Which is quite a high success rate for the second attempt.
What was the cost of the FMT at the
Taymount clinic in Hertfordshire, can I ask?
Maybe you could contact them and ask for a second attempt for free, or at a reduced price, given that the first did not work. You can quote them the Borody study which shows the second attempt is often successful when the first has failed.
From the Taymount clinic website, they say:
I am not sure whether that means they use transcolonoscopic or rectal infusion (and in any case, I am not sure if the infusion method is a factor in the success rate).
There are may threads on this forum about fecal transplant, by the way:
Fecal Transplant study: 58-70% recovery rate for ME/CFS
Poop: the cure of the future?
Faecal transplant eases symptoms of Parkinson's (and CFS)
Fecal transplants (fecal bacteriotherapy) - DIY home version very straightforward
Fecal Transplants: Seriously, What Do We Think?
Fecal Transplant Banishes C. Diff and improves insulin sensitivity
RePOOPulate: Synthetic stool effective agains C difficile