Isolation of NTM increased over time, primarily driven by Mycobacterium avium complex and Mycobacterium abscessus.
Just over half of subjects isolating NTM met ATS 2007 microbiological criteria.
More than one different NTM species was isolated in 20.6% of subjects.
Resistance to the key agents clarithromycin and amikacin was rare.
The highest rates of drug resistance were found in M. abscessus and Mycobacterium simiae.