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Nonsuppurative meningoencephalitis in a PRV experimentally infected piglet. (A) Perivascular cuffs consisting of lymphocytes and histiocytes and mild microgliosis (inset). (B) Lymphohistiocytic infiltration of the adjacent meninges with few neutrophilic granulocytes, H.E. (Courtesy: Department of Pathology, University of Veterinary Medicine Hannover, Hannover).
