草鱼Ctenopharyngodon idella是我国重要的淡水鱼类养殖品种,但养殖过程极易发生出血病导致草鱼大量死亡,给草鱼养殖业带来巨大损失。我国在20世纪70年代开始进行病原的研究,1980年发现病毒颗粒并确认为草鱼出血病病原,1991年国际病毒分类委员会将其命名为草鱼呼肠孤病毒(Grass carp reovirus,GCRV)。一直以来除呼肠孤病毒感染草鱼引起出血病外,未见有病毒和细菌混合感染的报道。本刊2009年8期介绍了邓国 Grass carp Ctenopharyngodon idella is an important freshwater fish breeding breed in China, but the breeding process is extremely easy to produce hemorrhagic disease, which leads to a large number of death of grass carp, causing great losses to grass carp aquaculture. In the 1970s, China began to study the pathogen. In 1980, the virus particles were found and identified as the pathogen of grass carp hemorrhagic disease. In 1991, the International Virus Classification Committee named it as Grass carp reovirus (GCRV). Has been reported in addition to reovirus infection caused by grass carp hemorrhage, no virus and bacterial mixed infection was reported. In this issue, we introduced Deng Guo