This second laboratory conference of the health organization of the League of Nations was called primarily for the purpose of conducting a comparative study of the numerous flocculation or precipitation tests for syphilis and especially of those elaborated since the first conference in 1923.
Thirty-seven medical men and women from nineteen countries attended the conference, at which 944 serums and 122 spinal fluids were tested by seven complement-fixation and seven precipitation, flocculation, turbidity or clotting tests. Dr. R. L. Kahn was the only American representative as Prof. John A. Kolmer, who was invited to be present, was unable to attend because of urgent duties at the University of Pennsylvania at the time of the conference.
Of the serums tested, 502 were derived from patients with known cases of syphilis in all stages of the disease both treated and untreated, 7 were derived from patients with no definite history of syphilis