Abstract
Summary
The development of type-specific anti-M precipitins was studied in 2 groups of patients suffering from hemolytic streptococcal infections. Most of the patients in group I, none of whom developed rheumatic fever, showed relatively strong type-specific reactions in their serum by the 4th or 5th week after the onset of infection. The members of group II all developed rheumatic fever; some had similar strong antibodies early; but most rheumatic patients from whom hemolytic streptococci were obtained in significant numbers did not show strong anti-M precipitins until distinctly later than was the rule for the non-rheumatic group.
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