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近几年来,养殖对虾发生了严重流行性虾病,经对病虾肝胰腺、胃、肠、鳃等部位进行超薄切片电镜观察和分离提纯,发现有大量杆病毒和细菌感染。超薄切片显:病毒粒子短杆状、两端钝圆、具羹膜、大小约250—310mm×90—110mm,提纯的核衣壳大小约300—320mm×70mm。将粗提纯的病毒和细菌口饲感染健康的日本对虾和长毛对虾,可同时引起对虾发病死亡,病毒感染8天后引起的死亡率分别是50％和41.7％,病毒与细菌共感染8天后的死亡率比前者高。这些结果说明:所分离的杆状病毒是日本对虾和长毛对虾的共同病原,在它们之间具有流行性,而细菌与这种病毒对虾体的共同侵染,造成更高死亡率。
In recent years, shrimp epidemic occurred in shrimp epidemic of severe epidemic, the sick shrimp hepatopancreas, stomach, intestine, gill and other parts of the ultra-thin section electron microscopy and separation and purification found a large number of baculovirus and bacterial infections. Ultra-thin slices were: virus particles short rod-shaped, blunt ends at both ends, with the membrane, the size of about 250-310mm × 90-110mm, purified nucleocapsid size of about 300-320mm × 70mm. Crude purified virus and bacterial oral infections infected healthy Japanese shrimp and long-legged shrimp, can also cause the death of prawn disease, the mortality rate caused by virus infection after 8 days were 50% and 41.7%, respectively, after co-infection with bacteria and bacteria 8 days The mortality rate is higher than the former. These results indicate that the isolated baculovirus is a common pathogen between P. japonicus and P. shrimp and is endemic between them and the co-infection of bacteria with this virus on shrimp causes higher mortality.