A critical study of the quantitative Kahn test (blood) in 100 cases of yaws

ABSTRACT

1. Serological reactions alone are of no value in the differential diagnosis between yaws and syphilis2. On the basis of our quantitative study, using the Kahn test, we found that yaws can also give a high titer; in fact, 94 per cent of our cases gave a titer of above 20 K.U., 30 per cent even reading 320 K.U. or more. (Conclusions)