Nancy, are you doing any nebulized saline now to at least try to thwart the infection for now? You may want to question the taking of azithromycin just yet as many mac experienced doctors prefer to use that drug as a last resort. It is considered a 'big gun' so to speak, and the fear is that your abscessus could become resistant to it and then you won't have many options. Mayo drs like to try other antibiotics first.