Neutrophilic Asthma Is Associated with Increased Airway Bacterial Burden and Disordered Community Composition

Figure 1

Bacterial burden in sputum samples from subjects with NA and non-NA. Airway bacterial burden was evaluated based on 16S rRNA gene copy number in sputum samples from 20 subjects with NA and 34 subjects with non-NA. Comparison between groups was made by using Mann–Whitney U test (a). Correlation coefficient between bacterial burden and neutrophil percentage was calculated by Spearman’s correlation (b). Data are presented as median and the interquartile range. The dots represent all of the values. NA: neutrophilic asthma.

(a)

(b)