FIGURE 3.

Bacterial taxonomy at the genus level in participants with COPD with and without exacerbation during follow-up. Taxonomic groups in the legend are sorted in decreasing order based on the average relative frequency of that group in all samples. Each bar represents one participant, ordered in the same position horizontally for all three sample types according to relative abundance of Streptococcus in rPSB samples. OW: oral wash; BAL2: second fraction of bronchoalveolar lavage; rPSB: right protected specimen brushes.