Figure 1.

Bacterial burden in BAL fluid of control subjects, subjects with CHP, and subjects with IPF. The Kruskal-Wallis test with the Dunn test for multiple comparisons was used (P < 2.2 × 10⁻¹⁶). Data are presented as the median and interquartile range (***P < 0.0001 and ****P < 0.00001). The bacterial burden was calculated by using quantitative PCR and was expressed in log₁₀ values (16S ribosomal RNA gene copies/ml of BAL fluid). CHP = chronic hypersensitivity pneumonitis; IPF = idiopathic pulmonary fibrosis.