用草鱼出血病灭活疫苗给当年鱼种进行免疫注射,对预防此病效果显著。但在七月以前给当年草鱼种注射疫苗时,由于规格小、数量多,加上水温偏高,鱼的活动力强,在注射操作时,不免有部分鱼种受伤死亡,致使免疫防病难以推广应用。我们为了克服这一弊病,曾多次在室内外试用麻醉药物丁卡囚(又叫地卡因),将鱼种轻度麻醉后,再注射疫苗。这佯不但减少了鱼种因注射操作的伤亡数,而且加 Vaccination with grass carp hemorrhagic disease vaccines to the year of immunization, the effect of preventing the disease was significant. However, in order to vaccinate grass carp species before July, due to the small size and quantity and the high water temperature, the activity of the fish is strong. During the injection operation, some species of fish died of injuries and death, making immunopathology difficult Promote the application. In order to overcome this flaw, we have repeatedly tried the indoor and outdoor narcotics Dingka prisoners (also known as cocaine), vaccinated the fish slightly after anesthesia. This not only reduces the number of fish injuries due to injection operations, and plus