Rheumatoid arthritis; hemolytic streptococcus precipitin reactions.
D001168:Arthritis; D001172:Arthritis, Rheumatoid / Q000175:diagnosis*; D006461:Hemolysis; D011234:Precipitins; D013290:Streptococcal Infections; D013291:Streptococcus
D011234:Precipitins
ARTHRITIS, RHEUMATOID/diagnosis; PRECIPITIN/reaction; STREPTOCOCCI/hemolytic