STUDIES OF THE VARIATIONS IN THE ANTISTREPTOLYSIN TITER OF THE BLOOD SERUM FROM PATIENTS WITH HEMORRHAGIC NEPHRITIS. I. CONTROL OBSERVATIONS ON HEALTHY INDIVIDUALS AND PATIENTS SUFFERING FROM DISEASES OTHER THAN STREPTOCOCCAL INFECTIONS

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Abstract
Repeated determinations of the antistreptolysin content of the serum in normal individuals and in patients suffering from a variety of chronic diseases unrelated to streptococcus infections showed that in the majority of cases the titer fell 25-50 units, and rarely more than 100 units. Only slight variations were observed in the titers of the serum from healthy individuals followed over periods as long as a year. In acute infections, other than hemolytic streptococci, titers above 100 units were encountered a little more frequently and occurred in 22.7% of 66 cases. In only 2 of the 66 cases were the titers elevated to 200 units or above.