Use of an enzyme immunoassay with protein A for rabies antigen and antibody determination.

The rabies antigen quantitation reported here is based on the principle of an enzyme immuno micro assay (EIA) using antigen coated polystyrene microtiter plates. In a first step antibodies of known specificity are partially blocked by the antigen to be titrated; in a second step the free remaining antibodies are determined by EIA. Antirabies vaccines, purified virus or rabies glycoprotein were assayed by that micro-method in comparison with the double neutralization test in tissue culture. Moreover, we report results obtained by EIA on the rate of antigen bonding to a solid carrier in order to prepare immunoadsorbents and the usefulness of EIA to monitor specific immunoglobulin elution.