[Application of CH50 assay to the detection of circulating immune complexes (author's transl)].

Detection and titration of circulating immune complexes appear as an essential tool for the diagnosis and prognostic evaluation of immune complex diseases. Authors propose a simple, rapid, senstive and quantitative method based on the evaluation of complement by soluble immune complexes measured by 50% hemolytic activity. This technique was compared to the I125 C1q binding test and may be recommended for clinical laboratory use.