Table 1.

Bactericidal antibody titers of the immune serum in vitro, the serum samples from the immunized mice were used for evaluating the serum bactericidal activity

	2 W	4 W	6 W
HBc-N144/F	1:2	1:2	1:2
HBc-N144-NspA/F	1:4	1:8	1:16
HBc-N144-NspA	1:2	1:8	1:8
NspA/F	1:2	1:2	1:4
PBS	1:2	1:2	1:2

Abbreviations: F, Adding the Freund’s adjuvant; HBc-N144, N terminal 144 amino acids of hepatitis B core protein; HBc-N144-NspA, Neisserial surface protein A fused with the N terminal 144 amino acids of Hepatitis B core protein; NspA, Neisserial surface protein A.