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Gross examination of liver, heart, kidney, and spleen from dead chickens. (A,E,I) Swollen and friable liver with multifocal areas of necrosis. (B,F,J) Hemorrhage and hydropericardium in the heart. (C,D,G,H,K,L) Mild or severe enlargement in the kidney and spleen of the infected chickens. (M–P) Normal control. Arrow indicates the lesion area.
