Histological appearance of the liver. A. The control, showing no histopathological changes. B. Mice infected with A246A* showing infiltration by parenchyma cells. C. Mice infected with A80A* showing marked mild infiltration of portal tract by chronic inflammatory cells and congestion of blood vessel. D, E, F. Mice infected with A245A* showing: D. aggregates. E. congestion. F. multinucleated hepatocytes. *As shown in Table 1.