[Determining the level of the rheumatoid factor associated with polyclonal and monoclonal human serum IgA].

Abstract

The authors studied the activity of the rheumatoid factor (RF) associated with polyclonal and monoclonal IgA contained in the sera of patients with chronic diseases of noninfectious etiology and A-paraproteinemia. IgA-RF-activity was determined by an enzyme immunoassay. In most of the patients' sera IgA had a high level of RF-activity. The frequency of RF… (More)

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