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[The determination of antigen-specific immune complexes by an immunoenzyme method].

The methodological approach permitting the detection of immune complexes containing specific antibodies to a definite antigen in the enzyme-linked immunosorbent assay (ELISA) is described. The basic conditions of the assay were optimized. Immune complexes were precipitated from blood serum with 3.5% polyethylene glycol 6000 for 4 hours. The precipitate thus obtained was dissolved and incubated in polystyrene plates with immobilized antigen at 37 degrees C for a long time (at least 6 hours) in a humid chamber. The amount of bound antibodies, determined by ELISA techniques, was conjectured from the level of antigen-specific immune complexes. The proposed approach can be used in the immunodiagnosis of infectious diseases.