Abstract: The use of an antibody to a C. albicans cell wall antigen or to a solubilized phosphopeptidomannan (PPM) fraction of the cell wall of C. albicans, or preferably a combination of an IgG2 antibody to a phosphopeptidomannan (PPM) fraction of the cell wall of C. albicans, and an IgG1 or IgG3 antibody to a C. albicans cell wall antigen in the diagnosis of candidiasis or invasive candidiasis is disclosed. Also diagnostic tests are disclosed.