Has anyone had spontaneous sputum conversion without taking the big 3? I was told recently that my latest samples produced no pathogens — i.e. MAC organisms. That is great news of course — I had no idea that would happen but found some studies that 40- 60% can spontaneously convert without the benefit of treatment. I was diagnosed about 8 years ago and just assumed I would always have it. I have had no symptoms other than a flare up recently when I caught a cold, hence the sputum samples to figure out what was going on. I was given a long explanation by my pulmonologist which was a little difficult to follow. Would love to hear from others if they know anything about this.