对发生于阳江市某网箱养殖场的卵形鲳鲹幼鱼大规模死亡进行了初步调查,发现病鱼症状为体色发黑、螺旋状或旋转游动、反应迟钝、厌食、无寄生虫及细菌感染,通过电镜负染发现有大小为30nm的病毒粒子,初步断定为神经坏死病毒感染。 A preliminary investigation of the large-scale death of ovale oyster juveniles in a cage farm in Yangjiang City found that the symptoms of sick fish were black body color, spiral or rotational swimming, unresponsiveness, anorexia, no parasites And bacterial infection, negative electron microscopy found a size of 30nm virus particles, initially concluded as nerve necrosis virus infection.