The year 1963 marks the 30th year of the long-term evaluation of the effect of untreated
syphilis in the male Negro conducted by the Venereal Disease Branch, Communicable …

Method Patient Selection 102 prison inmate volunteers were screened on the basis of
currently reactive treponemal immobilization (TPI) tests of their sera, completeness of …

Nodes from 45 men who had been treated for syphilis in varying stages of the disease were
studied. Five of these nodes were shown to contain treponeme-like forms, which in two …

Results All subjects survived the essential observations. The six 30,000 treponeme
inoculation siteswere darkfield-positive on the ninth day of infection in the controls. This …

Method Generally, the method set forth by Clark and Yobs (1963) was followed. Sero-
negative adult male rabbits were shaved and inoculated intracutaneously at six sites on …

Excerpt Collart, Borel and Durel (1962, 1964) reported the persistence of Treponema
pallidum in lymph nodes of 12 patients previously treated for seroreactive, usually manifest …