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Pathological changes in civets after inoculation with SARS-CoV. Lung tissues were taken at 13 dpi from animal no. 5 of group A (A) and no. 7 of group B (B). Alveolar septa enlargement with macrophage and lymphocyte infiltration was evident in both animals. (C) Hematoxylin and eosin stain (magnification, ×20) of lung tissue of the control animal showed no abnormal changes.
