Fig. 3

Growth curve of WT, SCVs, and RVT MAC phenotypes from patients with MAC-pulmonary disease. We measured the optical density of WT, SCV, and RVT phenotypes at 600 nm after the 30 days incubation. The SCVs showed a slower growth rate than the WT strain, whereas the RVT demonstrated a faster growth rate than the WT in 7H9 broth. All SCV exhibited a much longer lag phase than the WT and RVT phenotypes, and some strains remained in the lag phase for up to 30 days in 7H9 broth