Aeromonas hydrophila micro-capsular oral vaccine

The invention relates to an aeromonas hydrophila micro-capsular oral vaccine, which belongs to the technical field of biological pharmacy. The aeromonas hydrophila micro-capsular oral vaccine is prepared by using sodium alga acid and chitosan as wall materials, using the inactivated bacteria of aeromonas hydrophila as a core material and by using improved atomization and ion crosslinking technology. When the aeromonas hydrophila sodium alga acid-chitosan micro-capsular oral vaccine is used for immunizing a mouse and crucian, the phagocytosis activities of macrophages, the conversion efficiency of the splenic lymphocytes and the expression amount of cell factors such as IFN-gamma and Il-4 of the mouse and the crucian can be improved obviously. The relative protection rate of the vaccine for the crucian is 39.3 percent. A microcapsule is stable in a simulated gastrointestinal environment and shows high burst release and slow release; and the bacterial antigenicity of the microcapsule is well maintained and the vaccine has high safety and high storage stability.