Fig. 2
From: The lung microbiota in Korean patients with non-tuberculous mycobacterial pulmonary disease
Microbial richness in bronchial washing and PSB samples from the control and NTM-PD groups. Three outlier samples (one bronchial washing and one PSB from the control group and one bronchial washing from the NTM-PD group) with over 900 OTUs and a Chao1 richness index > 1000 exist outside the plots. a The numbers of OTUs (a measure of microbial richness) in each group. b The Chao1 richness index (a measure of alpha diversity) in each group. OTU, operational taxonomic unit; CR, control; WA, bronchial washing; PSB, protected specimen brushing; NTM-PD, non-tuberculous mycobacterial pulmonary disease