一、病症及检验初期仅见食欲不振,生长缓慢,饲料报酬低等不宜觉察的现象,死亡很少。后期鱼体色发黑,多有烂鳃、肠炎等症状,胸鳍、腹鳍等鳍基出血,腹部两侧出血,解剖见少量腹水,肌肉无出血点,肝脏表面有脂肪块积累,或肠管表面脂肪覆盖明显,肝组织淤血。由于患脂肪肝症状不明显,不宜被养殖者注意,只有仔细检查才会发现。检验可从以下方面进行。1.生长检测与摄食观测:发现鲤鱼、鲫鱼等养殖对象生长速度下降,食欲减退。饲料报酬降低,日粮减少等现象时,就要注意是否发生脂肪肝。2.解剖检验:解剖病鱼:肝、脾、胰、肠等器官被 First, the disease and early detection only see loss of appetite, slow growth, low feed remuneration should not be aware of the phenomenon, few deaths. Later body color black, many gills, enteritis and other symptoms, pectoral fin, pelvic fin and other fin base bleeding, bleeding on both sides of the abdomen, anatomy see a small amount of ascites, muscle no bleeding point, the liver surface accumulation of fat blocks, or intestinal surface fat Obvious coverage, congestion of liver tissue. As fatty liver symptoms are not obvious, should not be farmer’s attention, only to be carefully examined before they will find. Inspection can be carried out from the following aspects. 1. Growth and feeding observations: Found that carp, carp and other breeding objects decreased growth rate, loss of appetite. Fewer feed, reduce diet and other phenomena, we should pay attention to whether there is fatty liver. 2. Anatomy test: Anatomy disease fish: liver, spleen, pancreas, intestine and other organs were