Specificity of the Treponema pallidum haemagglutination test. Analysis of results.

Screening for syphilis among homosexual men in bars and saunas in Amsterdam.

“…The TPHA has been evaluated in a number of studies and is highly specific and sensitive for the detection of treated and untreated cases of syphilis. 10- 13 We, therefore assumed that the isolated positive TPHA results in sera of 279 patients were not biological false-positive reactions. Thus, 32-2% (524/1627) of the participants in the study were seroreactive for syphilis.…”