Expression of platelet GPVI and CLEC2 ligands in the lung before and after induction of pneumonia. Mice were infected with K pneumoniae via the airways and sacrificed at the time point indicated; uninfected mice served as controls. (A-B) Picrosirius red staining of lung sections shows collagen underneath the vascular endothelium (A) and bronchial epithelial cells (B). (C) Podoplanin staining of lung sections. (D) Fibrin staining of lung sections. (E) Histone 3 levels in the BALF determined by western blot (n = 4 per group). Histology slides are representative of 4 mice per group.