卵形鲳鲹刺激隐核虫病组织病理学研究

利用组织切片、HE染色和显微观察的方法,研究了卵形鲳鲹患刺激隐核虫病组织病理变化。组织切片结果可见,感染鱼的鳃和体表受到直接机械损伤;鱼体在缺氧状态下,入侵的刺激隐核虫有可能对机体产生某种毒素,也可能因刺激隐核虫感染而引发细菌或病毒继发性感染,造成肝、脾和肾脏不同程度的间接性损伤。表现为鳃部机能严重受阻,肝脏脂肪肝变性严重,肝索紊乱,血窦缩小或消失;脾脏组织结构不清晰,有充血、出血和坏死等症状;肾脏结构不清晰,肾小管及肾小体缩小,肾小管细胞融合(黏连),组织间隙松散扩大,局部细胞坏死,存在脂肪粒。

Histopathology study on the Cryptocaryon irritans disease of Trachinotus ovatus

Tissue sections,HE staining and microscopic observation were adopted to investigate the histopathological changes of Trachinotus ovatus with the Cryptocaryon irritans disease.Through histological examination,the results showed that the gills and skin of infected fish were suffered with direct mechanical injury.When the fish under the hypoxia condition,the Cryptocaryon irritans may produce toxins,or cause bacterial or viral infection,thus cause indirect injury of liver,spleen and kidney in different degrees.The injure had following performances:the gill function was seriously blocked,the fatty liver degeneration was severe ,hepatic cord was disordered,blood sinus shrunk or disappeared;histological structure of spleen was unclear and had symptoms such as congestion,hemorrhage and necrosis;renal structure was unclear,renal tubule and renal corpuscle were shrunken,renal tubule showed fused cells(adhered),interstitial space was loose and expanded,and local cell died and had fatty granules.