Histology of lung tissue from BAYV-, BCCV- and uninfected immunosuppressed hamsters.

<p>A) Lung biopsy showing a diffuse acute inflammation. Alveoli are filled with edema, mostly polymorphic inflammatory cells and fibrin (H&E x 100; Black Creek Canal virus group). B) Lung biopsy showing severe hemorrhagic edema in the alveoli, spilling over in the bronchiolar lumen (H&E x 100; Bayou virus group) C) Lung biopsy showing normal alveolar parenchyma and bronchioles (H&E x 100; Dex-Cyp control group).