Thanks for posting this Dr Marshall... very interesting indeed!
This all just points out how important it is to have a fully functioning immune system to keep the plethora of these microbes under control. It appears that many of the organisms that can make us very ill.. are present in and on our bodies all the time ... even in healthy individuals. And it is those who have a compromised immune system that get sick!
All this research backs up the important work you have done in identifying the importance of the properly functioning VDR for getting ... and staying healthy.
I found another article of interest related to this topic, from "Nature" March 2010:
"A human gut microbial gene catalogue established by metagenomic sequencing"
To understand the impact of gut microbes on human health and well-being it is crucial to assess their genetic potential. Here we describe the Illumina-based metagenomic sequencing, assembly and characterization of 3.3 million non-redundant microbial genes, derived from 576.7 gigabases of sequence, from faecal samples of 124 European individuals. The gene set, ~150 times larger than the human gene complement, contains an overwhelming majority of the prevalent (more frequent) microbial genes of the cohort and probably includes a large proportion of the prevalent human intestinal microbial genes. The genes are largely shared among individuals of the cohort. Over 99% of the genes are bacterial, indicating that the entire cohort harbours between 1,000 and 1,150 prevalent bacterial species and each individual at least 160 such species, which are also largely shared. We define and describe the minimal gut metagenome and the minimal gut bacterial genome in terms of functions present in all individuals and most bacteria, respectively.