I agree with you @hammerheadham , but if a person has GERD and takes proton pump inhibitors the acid is inhibited which helps the GERD, but then bacteria etc. have a better chance of living and causing trouble. I don’t know what article you are referring to, but I happened upon your post and am just adding what I have gleaned from years with MAC and now invasive aspergillosis. Hope you are well. @irene5