I am curious, did he make this diagnosis from looking at the bronchoscope, or did he remove some mucus and send it to the lab? Have you had imaging, either x-ray or CT to show the extent of involvement throughout the lungs?

Hot tubs are sometimes pointed to as the culprits in Mycobacteria infections, because they can expel the bacteria in the steam, which you then breathe in. But usually healthy lungs can fight them off...

Sue