Hey OM,
This is very interesting from all your stuff on the degradation of the mucus layer and such. At the same time, I recall reading an article from the Human Microbial Project recently where they talked about
the results they found in people with IBD. They said that what they found odd and worthy of looking into was that in general we all have a very similar make-up of bacteria in our systems common to all people and ethnic groups etc - BUT when it comes to the case of bacteriophages we are all different. They said even in the case of twins, this is the defining factor that stood out. From memory they said they found people were colonized with one of four main groups or types of bacteriophages from birth.
There was also another study that counted the quantity - they were shocked to realize that there was over a billion per cubic centimeter of feces i believe. And in people with IBD they either had more or less... I'm pretty sure it was actually substantially more present in the feces.
Anyway - I just got to thinking 1) maybe there's more to this and 2) perhaps in the case of fecal transplants, it's more a case of a phage mismatch for those that have a worsening of symptoms and such.
What I do know (or think it's correct) is that bacteriophages reproduce differently and in much higher numbers under stress - or more correctly when their environment is stressed... Instead of reproducing inside bacteria cells as the bacteria cells divide and reproduce - they take over and start producing multiple copies inside the bacteria cell, then burst out killing the bacteria cell.
It pretty interesting. Here is a link showing the two ways they reproduce - one killing the host cell and the other not -
en.wikipedia.org/wiki/Lytic_cycleThere's more somewhere that talks about
the difference between the two and the environmental stress.
Maybe something upsets the balance of these, causing stress and in turn they start mass producing killing their hosts and a sort of chain reaction occurs.. haha.. who knows... in any case it's a very cool article.
Or maybe in response to stress to many reproduce and bind to the sugars in the mucus and this causes damage by degrading the mucus barrier...
Or well, again there's a gazillion different ways one could think of