So, the short answer is that many of us use 7% saline solution in our nebulizers for 2 reasons...

First, it helps thin the mucus that plagues so many of us with lung diseases, so we can get it out more easily. That way the germs don't have such a nice warm, wet place to grow.

Second, research shows that the 7% saline suppresses the ability of MAC bacteria to grow. So those of us who quit antibiotics, either due to getting negative cultures or because we couldn't tolerate them, are less likely to get a bad infection again. Some people find 7% too harsh, and their doctors may prescribe 3% instead - helpful for clearing mucus, but maybe not as useful for suppressing MAC.

I have bronchiectasis, asthma, hyperreactive airway, and had MAC and pseudomonas. It was 4 years ago that I was diagnosed, and for the past 2 1/2 years I have stayed pretty healthy with 2 inhalers, nebbing saline, doing airway clearance, getting exercise & a good diet. I only wish I had more energy - some days it is hard to breathe, and I can no longer run with my little grandsons (but we find lots of other things to do!)

Are you taking antibiotics for MAC?
Sue