Hey, I can't really give you any advice on MAC prior to transplant but I cultured it afterwards. I was taking Zithromax when I cultured it and they definitely did not take me off of it, I stayed on it. They also started me on Ethambutal and Mycobutin...Im supposed to stay on those for a year after culturing negative for MAC.
MAC I can't really say affected my pfts all that much, I was dealing with rejection at the same time. It didn't cause me to need extra O2 and after being on the antibiotics they prescribed for a month I was negative for MAC. So they seemed to work extremely well and it's over a year later and I'm still negative for it.