Abstract
A novel enzyme-linked immunosorbent assay, BLA IgM-ELISA, based on baculovirus-expressed Puumala (PUU) virus nucleocapsid protein, was developed for rapid diagnosis of nephropathia epidemica. The recombinant antigen (bac-PUU-N) was purified to homogeneity by HPLC and conjugated to biotin. The biotin-streptavidin system, in combination with the mu-capture technique, rendered the BLA IgM-ELISA a sensitivity similar to or higher than that of PUU virus IgM mu-capture ELISA based on native antigen. The assay was shown to be highly specific when evaluated using a panel of 160 patient and control sera.
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