Mice vaccinated with recombinant rMSP1 (rPbMSP1), which was generated from Plasmodium berghei, in alum mounted significant protective immunity against challenge infection (P < 0.01). On day 121 after the booster, three out of ten mice immunized with rPbMSP1 in PBS survived parasite infection (P < 0.05) and eight out of ten mice vaccinated with r MSP1 in alum did (P < 0.01). Hence, immunization with MSP1 in alum obviously has conferred protective effects, which prevented death from P. berghei lethal infection in mice (P < 0.01) (Wan et al., 2007).
Wan et al., 2007: Wan Omar A, Roslaini AM, Ngah ZU, Azahari AA, Zahedi M, Baharudin O. A recombinant 19 kDa Plasmodium berghei merozoite surface protein 1 formulated with alum induces protective immune response in mice. Tropical biomedicine. 2007; 24(1); 119-126. [PubMed: 17568385].