对近两年在我国福建省等地养殖的鳗鱼暴发流行的一种不明病因的疾病（俗称“狂游病”），通过寄生虫学、细菌学、病毒学检查，以及人工感染回归试验，确认其病原为鳗冠状病毒样病毒。该病毒主要侵害鳗鱼的肝脏、肾脏和心脏，导致这些器官的实质细胞呈现变性、坏死变化 A disease of unidentified etiology (commonly known as “madness disease”) that has been endemic to the eel species farmed in Fujian Province of China for nearly two years has been confirmed by parasitological, bacteriological, virological, and artificial infection regression tests Its pathogen is eel coronavirus. The virus mainly infects the liver, kidney and heart of eels, resulting in degeneration and necrosis of parenchymal cells in these organs