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Morphologic Diagnosis: 1. Spleen, red pulp: Vasculitis, fibrinonecrotizing, multifocal, marked, with necrosis, breed not specified, porcine.
2. Spleen, white pulp: Lymphoid depletion, diffuse, moderate.
Etiologic Diagnosis: Pestiviral splenic infarcts
Etiologic Synonyms: Classical swine fever virus
Cause: Porcine pestivirus