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Lung from necropsy of a bottlenose dolphin (Tursiops truncatus) that had fatal systemic morbillivirus infection, Canary Islands, Spain, 2005. Positive intracytoplasmic and intranuclear immunoperoxidase staining of morbilliviral antigen (red) within hyperplastic type II pneumocytes, macrophages and multinucleated syncytial cells. Avidin-biotin-peroxidase with Harris hematoxylin counterstain. Scale bar indicates 100 μm.
