Local South Florida pulmonologist has confirmed MAC. Treatment to be discussed at next doctor’s visit. Internet research has me worried about possible side effects affecting my ablity to get through work week & be care giver to sick husband. Am wondering if I should seek top notch specialist in local medical/university centers. A penny for your thoughts… Have Rheumatoid Arthritis & have been taken off 9 yr. treatment of Humira which is suspected of having compromised my already weak immune system. Any R.A./MAC patients out there?