Abstract
Bioluminescent method for β-galactosidase assay is proposed with sensitivity as high as 0.25 fmol/1 with the help of bioluminogenic substrate – firefly luciferin derivative. Method was applied to immunoassay of foot-and-mouth disease viral antigen and biotinylated DNA-probe analysis with the help of β-galactoside labelled conjugates. Methods proved to be very sensitive, rapid and simple in performance. Photographic detection and reprobing of the samples are possible.