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The main aim of serological post-treatment follow-up in patients treated for early syphilis is to identify treatment failure or re-infection.1 Most experts define treatment failure or re-infection as ‘serological’ when the Venereal Disease Research Laboratory (VDRL) titre increases fourfold after treatment. In addition, poor serological response is represented as failure of the VDRL titre …
Competing interests None.
Ethics approval Ethical approval for this work was provided by the Jagiellonian University School of Medicine Ethics Committee.
Provenance and peer review Not commissioned; internally peer reviewed.