Yes, I had something similar. I had 4 different sputum cultures report abscessus and when my dr asked the lab do susceptibility testing to see if it had the erm gene they realized I didn't have abscessus but that it was Mycobacterium avian complex instead. A few months later I went to NJ and the sputum cultures have all showed Mycobacterium Intracellular. Its really important to use a good lab.