Figure 4.

A, B: Inflammation in the lung parenchyma associated with vasculitic and thrombotic blood vessels (arrow). C: Glomerulitis characterized by thrombotic plugs, inflammation, and syncytial formation (arrow) at the periphery of the glomerulus. D: Viral antigens were detected in a tubule and glomerulus (arrow). E: Viral antigens found in the epithelium covering the papilla in the kidney (arrow). F: Viral antigens demonstrated in lymphoid cells of the white pulp in the spleen. A–C: Hemalin-phloxine-safranin stain; D-F: IHC, hematoxylin counterstain. Original magnifications: ×5 (A); ×20 (B, F); ×40 (C–E).