The invention provides a method for industrially producing porcine
Japanese encephalitis (JE) vaccines by utilizing a
bioreactor. The method comprises the following steps: (1) sterilizing a
microcarrier and the
bioreactor, then inoculating cells for vaccine preparation for culturing, inoculating JE viruses when dense monolayers are formed on the cells on the
microcarrier, and continuing culturing to reproduce the viruses; (2) stopping culturing and harvesting
virus suspension when cytopathy reaches more than 80%; (3) carrying out ultrafilter concentration as well as
virus inactivation on the harvested
virus suspension; and (4) purifying the inactivated viruses by adopting
column chromatography to prepare inactivated vaccines. In the method, the technology of using the
microcarrier in the
bioreactor for culture is adopted to carry out
high density culture of the cells to produce the porcine JE vaccines. Compared with the traditional spinner
bottle production method, the method has the following advantages: the
automatic control degree is high, so production can be monitored in real time; the labour is saved, thus reducing the cost; the land for production is few, thus being easy to enlarge the scale of production; and the produced viruses have
high titer, so the batch-to-batch variation is small, the product quality is stable and the
side reaction is low.