mrsD, thank you for that link.

I think that it is part of what is a hot topic with biomedical scientists - there is increasing evidence that differences in the kinds of bacteria (the gut microbiome) which normally live in the gut may be causally linked to conditions ranging from inflammatory bowel diseases, Autism Spectrum Disorder, Major Depressive Disorder, among others.

I think that this is currently at the basic science stage but, with more hard work it may (depending on the results), lead to better therapies for many health issues.