Rheumatoid factors: value of their determination in patients with rheumatoid arthritis
Ruffatti, A.; De Silvestro, G.; Meneghini, P.; Doria, A.; Pellizzaro, E.; Gambari, P.F.; Todesco, S.
Bollettino della Societa Italiana di Biologia Sperimentale 59(8): 1160-1164
1983
ISSN/ISBN: 0037-8771 PMID: 6354211 Document Number: 214464
IgM, IgA, IgG rheumatoid factors were investigated by a indirect immunofluorescence method in three groups of patients affected with rheumatoid arthritis of various picture: 30 patients with mild articular disease, 20 with severe joint involvement and 19 with articular and systemic symptoms. Rheumatoid factors occurred more frequently in patients with articular and extraarticular severe rheumatoid arthritis; moreover these patients showed higher titres and higher incidence of different immunoglobulin class rheumatoid factors in comparison with rheumatoid patients having mild joint disease.