I was diagnosed with bronchiectasis and my pulmomologist felt I had MAC from my CT scan. However, no cultures, stains etc. came out positive for MAC. He began me on nebulizer with Albuterol which I could not tolerate. I had a continual cough that was dry. He has advanced me to the point where I nebulize twice daily with a percussion vest and volara system. My cough is now "wet" and I feel I am cleaning out my lungs. From the forum I use 7% saline in the morning and 3% in the evening. I have never had any infection or exacerbations since beginning the nebulizing. ( 2 yrs now) If traveling I use a portable nebulizer and do not take my vest. On really busy times I may only nebulize in the mornings with the 7%, or miss completely. I try to maintain my basic routine daily to cover the days when it is difficult to follow the routine.