The application of tests for the determination of serum immune complexes in nephrology has supplied fresh pathogenetic and symptomatological information. An account is given of results obtained in primary and secondary glomerulonephritis using four methods; the solid-phase Clq test, the polyethylene glycol precipitation test, the immunofluorescence on polymorphonucleates tests, and the solid-phase conglutinins test (with anti-IgA antibodies). The results take on a symptomatological meaning in many classes of human glomerulonephritis, both in the differentiation of primary forms and those secondary to systemic diseases, and in prognosis. A critical review is made of the data obtained in a personal series in the light of a long-term follow-up. The limits and specificity of each test are also discussed.
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