I would like to read the post... more importantly, I would like to see in what context it was written.
RE: your first sentence...
If you cannot find the reference, I would think;
1. the post never existed
2. you may have misinterpreted something he has stated
3. it exists and your statement is taken out of context; for instance a bacteria that thrives in an oxygen poor environment.
RE: your second sentence...
1. the post never existed
2. you may have misinterpreted what he has stated
3. what type of gut flora according to the ML post?