If you want to avoid/delay antibiotic therapy the 7% is worth a try - it actually suppresses the growth of MAC. This group was very different when I joined 5 years ago, reinfection seemed much more common, and there was less stress on airway clearance and saline as an alternative.

Some clinicians now call airway clearance the first line of defense for those who are not severely ill with MAC, and who do not have cavities in their lungs. They take a wait and watch approach to see if that is enough to keep the infection level low enough to avois antibiotics.

It will be interesting to see what your docs have to say.
Sue