Histological lesions in multiple organs. Pathological changes were characterized by hemorrhage, hyperemia, inflammatory infiltration, and necrosis. (A, B, C) Myocarditis. (D) Dysplasia of the lymphoid follicles in the spleen. (E, F) Liver displaying hepatic necrosis and lymphocyte infiltration. (G, H) Lung with extensive lymphocyte infiltration, hemosiderosis, hemorrhage, and shed alveolar epithelial cells within the bronchioles and alveoli. (I, J) Necrosis and degeneration in the kidney. (K, L) Dysplasia, fibrosis, lack of lymphocytes, and necrosis in a lymph node. (M, N) Coagulation, necrosis, and abruption of the intestinal villi.