title: Antigen-antibody complexes in the serum of patients with juvenile chronic arthritis.
abstract: IgG-containing antigen-antibody complexes were detected in the sera of all of 7 patients with the systemic form of juvenile chronic arthritis, usually at high levels. Only 9 of 25 patients with the polyarticular form had such complexes, usually at low levels. Three patients had low levels of serum IgA which were probably drug induced; the one patient with low C2 and the 3 with low yeast opsonisation were probably not more than to be expected in a random population.
mesh_terms: D000293:Adolescent; D000936:Antigen-Antibody Complex; D001168:Arthritis / Q000276:immunology*; D002648:Child; D002675:Child, Preschool; D002908:Chronic Disease; D006801:Humans; D007070:Immunoglobulin A / Q000032:analysis; D007074:Immunoglobulin G / Q000032:analysis
chemical_list: D000936:Antigen-Antibody Complex; D007070:Immunoglobulin A; D007074:Immunoglobulin G