There are lots and lots of questions about fecal transplants. We’re just coming to grips with the gut microbiome’s impact on health and disease, and we know so little about what is actually in that magical brown pellet (which is about 55% bacteria, in case you were wondering.) Does a donor have to be matched to the patient, or is any healthy stool good enough? Do some patients respond to the treatment and others don’t – maybe in a predictable way? Does the sample need to be fresh, and if not, what is the best way to store it? Can poop be replaced entirely by a synthetic, probiotic concoction? Are there legions of failed FMT patients who are too disappointed, or embarrassed, to publish negative results?
