Pseudomonas grows everywhere. There is really no way to avoid it. It particularly likes marshy areas. People with "dry" lungs can enhale it without becoming colonized with it because their luns are too dry to make a ood environment. On the other hand people with CF have "juicy" luns and when they enhale pseudomonas the pseudomonas can continue to live in their luns. So, yes, pseudomonas kinds of hans out in your luns - but more like alae (if it is mucoid pseudo) than like mushrooms.
<a target=_blank class=ftalternatingbarlinklarge href="http://textbookofbacteriology.net/pseudomonas.html
">http://textbookofbacteriology.net/pseudomonas.html
</a>
When you enhale TOBI you kill off some of the pseudo - enough so that it doesn't clog thins up so much - but you can't kill it off. The luns of someone with bronchiectasis are just too neat a place for the pseudo to grow for you to ever be able to kill it off entirely.
-LisaV