Viral nervous necrosis (VNN) associated with mass mortalities in cage-reared sea bass, Dicentrarchus labrax (L.)

dicentrarchus labrax enfermedades de los peces epidemiologia epidemiologie epidemiology fish diseases grecia greece histopathologie histopathology histopatologia invertebrate viruses maladie des poissons nodaviridae percoidei virose viroses virosis virus de invertebrados