Mycobacterium avium complex (MAC) is the most common non-tuberculous mycobacteria (NTM) species, with the prevalence of NTM infection increasing in recent years.

Untreated patients with a nodular bronchiectatic form of Mycobacterium avium complex (MAC) suffer long deterioration in the long run despite their lack of symptoms, a new Korean study shows.

This suggests that patients with MAC lung disease should be better monitored to avoid irreversible lung damage.

The study, “Natural course of the nodular bronchiectatic form of Mycobacterium Avium complex lung disease: Long-term radiologic change without treatment,” appeared in the journal Plos One.