Relationship between pneumotype/supraglottic-characteristic taxa and lung inflammation. Inflammatory cells (lymphocytes and neutrophils) and eNO were measured in BAL of asymptomatic subjects (never-smokers in open circles and smokers in closed circles). (A, B,C) Comparisons of inflammatory cells and eNO between pneumotypeUN and pneumotypeSCT (Mann–Whitney). PneumotypeSCT was associated with higher inflammatory BAL cells and higher levels of eNO. (D, E,F) Correlations between relative abundance of Veillonella, supraglottic-characteristic taxa, in BAL in relation to inflammatory cells/eNO (Spearman rho correlation). Veillonella showed a positive correlation with both BAL inflammatory cells and eNO.