@poodledoc Hi. I had read an article back in 2010 that the 7% saline was being used successfully in France to treat mac. I asked my pulmonologists in Tucson, Az about it and they said they had never heard of it and did not prescribe it for me. Then in 2013, I mentioned it to my Mayo dr and he said "Oh yeah, that is a fabulous idea, lets try it." After seeing the good results in me, I think he started to use it more and more. When I first started mentoring this group here; hardly anyone was being treated with the saline. If I had to guess, I'd say most of us are now, and most say they are doing better by using it. When we know better, we do better. *Saline treatment is not ideal for everyone. Patients with severely abscessed or very fragile lungs are not candidates for use.