tinaesims I have had bronchiectasis for many years (I'm sure) but was finally diagnosed at Mayo's three years ago. I had just a bit of MAC but the pulmonologist there told me most everyone has some. He went on to say he might have too -- he doesn't know -- because he's had no reason to find out. He says unless it increases, we won't worry about it. Just thought I would share what little I know about slight cases of MAC. Perhaps he's wrong -- but that's what I was told.