This article is much clearer than the previous one. Really!
In other words, to check whether I have well understood: if we are missing some good bacteria in the gut, this means there is room for no so good bacteria to take over. And the presence of the good guys were controlled by this missing gene. Am I right? :D
Yes! Thanks @lemouth. That's indeed the message. One more thing though, the bad guys in large numbers were able to take over the good guys even when gene was intact. There was something about living together with mutants!
Lol! Mutations are transmissible. Yes indeed, I forgot to mention this part (with a very nice cartoon ;) ).