I see a pulmonologist at Jeff in Philly. I too have bronchitis and Mac. I took AZ and ethambutol for a year ending three years ago. While I have had a recent flare up of pseudomonas, Mac is not showing up in my cultures. Jeff is affiliated with Jewish Health. It seems they are leaning towards not including Rifampin in the treatment of Mac. For many it is the one that is most difficult to handle.