CAP1 and Candidiasis, Invasive: As such, it is considered to be a leading vaccine candidate among the virulence-associated factors of C. albicans. In one study, a monoclonal antibody CAP1 was found effective for the detection of the Sap antigen, which indicated that the Sap-antigen-based ELISA assay could be used in the diagnosis of invasive candidiasis [46].