The recombinant plasmid was transformed into E.coli JM109 by electroporation to construct the genomic library with the capability about 22500.

• 同时，以此荚膜抗原和外膜蛋白免疫兔制备兔抗I型鸭疫里默氏杆菌的高免血清，作为基因组文库的筛选工具。