ETV5 and cystic fibrosis: The requests for clinical microbiology laboratories to delineate the M. abscessus group is likely to increase in the future with emerging evidence that sub-species within the group are associated with differing clinical outcomes [16]–[18], transmission within cystic fibrosis populations [33], and therapeutic implications, including the propensity for M. abscessus to develop macrolide resistance via activation of an intact erm gene [13].