We employed a P. berghei parasite line that expresses a heterologous CSP (CS) from P. falciparum in order to assess the role of the CSP in the protection conferred by vaccination with radiation-attenuated P. berghei parasites. Our data demonstrated that sterile immunity could be obtained despite the absence of immune responses specific to the CSP expressed by the parasite used for challenge (Grüner et al., 2007).
