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一、草鱼冬片的免疫防病 在低温情况下(8℃-20℃),草鱼新陈代谢较弱,通过注射或浸泡接种途径使草鱼获得有效抗原免疫剂量,经过5—30天以上的低温(10℃—15℃)诱导,使注射或浸泡草鱼完成初次免疫应答反应,在温度提高时(20℃),鱼体的免疫抗病力水平能得到迅速加强,产生足够的能抵御草鱼致病病毒和细菌感染的相应抗体,达到减少二龄草鱼发病机会的目的。
First, the immune protection of grass carp Winter disease prevention and control at low temperatures (8 ℃ -20 ℃), grass carp metabolism is weak, by injection or immersion route of vaccination to obtain effective antigen immune dose of grass carp, after more than 5-30 days of low temperature (10 ℃ -15 ℃) induction, so that injection or soak grass carp to complete the initial immune response, when the temperature increases (20 ℃), the fish’s immune disease resistance level can be rapidly strengthened to produce enough to withstand grass carp pathogenic virus and The corresponding antibody of bacterial infection, to reduce the incidence of second-degree grass carp purpose.