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ABSTRACT
In vitro methods for quantification of immunodominant glycoprotein in the rabies vaccine formulations serve as good alternative to the cumbersome and variable mice potency assay as a batch release test for the vaccine. The present study presents the development of a sandwich ELISA with optimal concentrations of a high affinity recombinant diabody (D06) and a specific monoclonal antibody (M5B4) against rabies glycoprotein for its quantification in the vaccine formulations. The glycoprotein estimate correlated linearly (r2 = 0.8) to the in vivo potency estimate for the vaccine formulations. This ELISA promises a good forecast of the mice potency values and thereby can serve as a simple, yet effective batch release test for the rabies vaccines replacing the in vivo assay.