鱼类病毒病、细菌病、营养代谢病、水质污染及长期大剂量使用同一种抗菌药物造成耐药性等都会引起鱼类肝胆发生病变,尤其是二龄草鱼患此病的几率较高,往往给广大养殖户造成大的经济损失。一、鱼类肝胆病变症状鱼类患肝胆病变,通常外表正常,主要问题在内脏。其主要症状表现为:1. Fish virus diseases, bacterial diseases, nutritional metabolic diseases, water pollution and long-term high-dose use of the same antibacterial drug resistance and so on will cause fish liver and gall bladder lesions, especially the second-degree grass carp higher risk of the disease, often To the majority of farmers caused great economic losses. First, the symptoms of fish liver and gallbladder Disease of liver and gallbladder disease, usually looks normal, the main problem in the internal organs. The main symptoms are as follows: 1.