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Updated: Aug 10, 2026

Measuring the 50% Haemolytic Complement (CH50) Activity of Serum
Published on: March 30, 2010
[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.
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.

