Abstract
Summary The intracutaneous Congo Red test was studied in 30 subjects with the adult type of rheumatoid arthritis and in 24 patients with other collagen diseases. The rate of fading of the dye was compared with a control group of 40 subjects, some of whom were normal while the remainder suffered from a variety of general medical diseases.The fading rate in adults with rheumatoid arthritis did not differ significantly from the control group of non-collagen diseses.A marked and significant delay in absorption was observed in rheumatic fever. A small number of subjects with Still's Disease and systemic lupus erythematosus also exhibited delayed F. Rs. Possible causes for this are discussed.
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