Since the advent of the precipitation tests for syphilis, several papers have appeared giving the results of the various modifications of the test as compared with the Wassermann test.
A clinical study of a sufficient number of cases tested by one of the new methods and checked by a routine Wassermann test should be of value. This was accomplished by using the routine Wassermann test at the Central Free Dispensary from Nov. 27, 1922, to July 26, 1923. In the study of this wide range of material, certain principles of value were established.
The Wassermann test was run with a cholesterolized antigen and an acetone-insoluble antigen. Only three degrees of hemolysis are recorded: (1) complete inhibition of hemolysis + ++, (2) moderate inhibition of hemolysis ++, (3) slight inhibition of hemolysis +.
The Herrold1 modification was adopted as a precipitation test. We used the alcoholic extract of beef heart after a preliminary ether
EBERT MH, MITCHELL JH. A COMPARATIVE STUDY OF THE HERROLD PRECIPITATION TEST AND THE WASSERMANN REACTION. Arch Derm Syphilol. 1924;10(1):36–41. doi:https://doi.org/10.1001/archderm.1924.02360250057003
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