黄鳝“神经紊乱症”是近几年出现的对成鳝危害极大的常见病。该病在湖南黄鳝主要养殖地区流行并逐步蔓延。调查发现，在流行区发病率约为50％，死亡率为80％～100％；流行季节是5～9月。疾病发生与养殖密度、水质环境成正相关。该病发生的主要原因是生态环境不良，可基本排除寄生虫等病原生物的致病性。 Eel “neurological disorder” is a common occurrence of great harm to the eel in recent years. The disease prevails in the main breeding areas of Hunan eel and gradually spread. The survey found that in the epidemic area incidence of about 50%, the mortality rate of 80% to 100%; popular season is from May to September. Disease incidence and culture density, water quality and environment is positively correlated. The main reason for the disease is the poor ecological environment, which can basically rule out the pathogenicity of pathogens such as parasites.