FIG 2.

Brain. (A) Cerebral cortex sample, striped dolphin, case no. 8, morbillivirus immunohistochemistry. Morbilliviral antigen is expressed in the cytoplasm and nuclei (arrowhead) of neurons and axonal processes. Immunoperoxidase technique with a monoclonal antibody to the nucleoprotein of canine distemper virus as primary antibody. Hematoxylin counterstain. Scale bar, 50 μm. (B) Cerebral cortex sample, case no. 7, morbillivirus immunohistochemistry. Spongiform neurodegeneration of an immune-positive cell within the white matter. Hematoxylin counterstain. Scale bar, 50 μm.