Fig 6. Percent abundance of OTUs with significant enrichment detected by LEfSe.

Of the three taxa LEfSe identified as significantly enriched in patients with hypoxemia, Staphylococcus had the highest percent increase in abundance. However, Prevotella melaninogenica was more consistently present among patients with hypoxemia, resulting in its higher ranking over Staphylococcus spp. (A) Bacterial abundances for taxa identified as significantly enriched by LEfSe are displayed per patient. The X axis is labeled with each patient’s PaO₂/FiO₂ ratio and the Y axis displays relative abundance of the taxa. (B) The range of abundances of the three significantly enriched taxa are split by patient hypoxemia status along the X axis. (n = 48).