The invention discloses a large-scale production and inactivation process for
foot and mouth disease viruses. After
standardization of an inactivator cyclization method is established, storage time and temperature of the inactivator are optimized,
toxicity test of 50% Na2S2O3 on BHK-21 cells and dosage optimization of inactivated 50% Na2S2O3 in
mass production are carried out, and different foot-and-mouth
disease virus strains TCID50 and inactivation
kinetics curves are established, the method is applied to large-scale production. After cyclization of the inactivator, whether BEA cyclization succeeds or not is judged by detecting pH and color change of a beta-naphthol purple indicator, thorough inactivation of
venom is further ensured,
biological safety is improved, meanwhile, it is determined that the inactivator can be stored at the temperature of 2-8 DEG C, and the storage life is smaller than or equal to 14 d; 50% of Na2S2O3 is not added after
venom inactivation is finished, so that side reactions after
vaccination are reduced, the safety of
vaccination is improved, and the production cost of the vaccine is reduced; the inactivation process can be accurately controlled, the inactivation efficiency can be improved, the complete inactivation of viruses can be ensured, the
biological safety risk in
vaccine production can be avoided, the inactivation time can be shortened, and the
production cycle can be shortened by drawing the inactivation power curve of different strains.