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1 草鱼出血病的病理及症状1.1 出血病的病理变化中国科学院水生生物研究所1983年把草鱼出血病定为由病毒引起的疾病,此病毒为草鱼呼肠弧病毒(GCHV)。草鱼感染后,引起体壁、肌肉、肠道,肠系膜、肝、胆、肾、脾、鳃等脏器中的小血管广泛性损害。这些脏器的小血管大都扩张充血,内皮细胞肿胀、坏死,管壁结缔组织发生程度不等的水肿和坏死,其中毛细血管尤为显著。因毛细血管通透性增加,致使血液渗出,循环量减少。由于小血管内皮细胞的损坏,激活了凝血因子,产生弥散性血管内凝血,形成血栓。血管壁的直接损害和弥散性血管内凝,耗去大量
1 Grass carp hemorrhagic pathology and symptoms 1.1 The pathological changes of hemorrhagic disease Institute of Hydrobiology, Chinese Academy of Sciences 1983, the grass carp bleeding as a disease caused by a virus, the virus is Grass Carp Reovirus (GCHV). Grass carp infection, causing the body wall, muscle, intestinal, mesenteric, liver, gallbladder, kidney, spleen, gills and other organs in the small vessels of extensive damage. Most of these organs of small blood vessels expansion and congestion, endothelial cell swelling, necrosis, tubular wall of varying degrees of occurrence of connective tissue edema and necrosis, in which capillaries are particularly significant. Due to increased capillary permeability, resulting in blood exudation, reduced circulation. Due to the destruction of small vascular endothelial cells, activated coagulation factors, resulting in disseminated intravascular coagulation, thrombosis. Direct damage to the vascular wall and disseminated intravascular coagulation, consume a large amount