Objective To investigate the effect of α-mannatide as an adjuvant on immunogenicity of M. RCAg-1, a multiepitope protein vaccine against Plasmodium falciparum. Methods Mice were randomly divided into four groups, and immunized s.c. with M. RCAg-1, M. RCAg-1 + α-mannatide, α-mannatide and M. RCAg-1 + Freund's adjuvant respectively on days 0, 14 and 28, 0. 1 ml for each. The serum Ig G level, antibody subtype and recognition of single epitopes by serum antibody were determined by ELISA after the third immuniz...