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The application of epitope mapping in the development of a new serological test for systemic candidosis

, : The application of epitope mapping in the development of a new serological test for systemic candidosis. Journal of Immunological Methods 143(1): 73-80

A new serological test for systemic candidosis was developed by raising a rabbit antiserum probe against a specific epitope on Candida albicans, hsp 90. A major fragment at the carboxy terminal end of this immunodominant candidal antigen was epitope mapped by Geysen's method. An epitope, recognised by all infected patients with antibody to the 47 kDa antigen, was synthesized and conjugated to keyhole limpet haemocyanin. A rabbit was successfully immunized against this synthesized peptide epitope and this antiserum was compared, in a dot-immunobinding assay, with unfractionated hyperimmune rabbit antiserum to C. albicans and an affinity-purified rabbit antiserum to the 47 kDa antigen. The epitope-specific antibody probe was more sensitive than the hyperimmune candidal antiserum but less sensitive than the affinity-purified antibody against the 47 kDa antigen, which recognised multiple epitopes. This probe is technically easy to prepare in large amounts and gives no false positives.


PMID: 1717606

DOI: 10.1016/0022-1759(91)90274-j

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