Reaction of Sera from Patients with Yaws in Quantitative Complement-Fixation Tests for Syphilis and Tuberculosis

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  • Division of Laboratories and Research, New York State Department of Health, Albany


Forty-one of forty-four sera from patients with yaws reacted in the quantitative complement-fixation test for syphilis, thirty-five with titers ranging from 10 to 400. The same linear relations between the reagents were observed as with syphilitic serum and the cholesterolized tissue extract antigen.

The bearing of the results on the specificity of the reactions as illustrated in this group and in a similar small series of cases of leprosy examined in quantitative complement-fixation tests for syphilis and tuberculosis is discussed.