The Antistreptolysin Titer in Rheumatic Fever, Arthritis and Other Diseases.

Since 1933 a number of serologic tests have been made in the study of patients with rheumatic fever, arthritis, and several other diseases, who have come under the authors' care. These tests include gonococcus complement fixation, hemolytic streptococcus agglutinin and precipitin tests, and antifibrinolysin and antistreptolysin titrations. A preliminary report of the results of these was made in 1936 (1). The purpose of the present report is to give a more detailed analysis of the results of antistreptolysin determinations performed from 1933 to the end of 1938. We have determined the titer of the serum of normal subjects and patients with the following diseases: