@nlee1954 I just responded to farfalina about treating MABC with a virus along with the antibiotics. Dr Daly (NJH) had mentioned the treatment in one of his BE/NTM videos. My sister has a friend that is getting that treatment now. I'm hoping to talk to her sometime and will post any good info. It sounds like the antibiotics were unsuccessful and she sought out a clinic (don't know details) that is now giving her the matched virus via IV along with antibiotics.