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Patients with rheumatic fever (RF) and Kawasaki disease (MCLS) were divided into two groups, one with and the other without cardiovascular lesions, and their sera were examined for antibodies to 4 streptococcal antigens: anti-streptococcal polysaccharide (ASP), anti-deoxyribonuclease B (ADN-B), anti-streptolysin O (ASO) and anti-streptokinase (ASK) in order to clarify the relationship between group A streptococci and these two diseases. In RF the frequency of positive levels of ASP at its early stage was lower than those of the other 3 antibodies, but the ASP titer tended to persist at elevated levels. The frequency of ADN-B in patients with rheumatic heart disease (RHD) was higher than that in those without RHD, but with regard to the other antibodies no difference was found between the two. Of the 4 antibodies the frequency of at least one positive level was 100% in all the sera of RF patients within 3 months from onset. The differences in the frequencies of positive levels of all 4 antibodies in both MCLS and the controls did not prove to be significant. The frequencies of ASP, ADN-B and ASO in the sera of patients without cardiovascular lesions tended to be slightly higher than those in patients with cardiovascular lesions.

Study of antibody response to 4 streptococcal antigens in rheumatic fever and Kawasaki disease with or without cardiovascular lesions.