Clinical Research Directory

Inclusion Criteria: * 12 years of age or older. * The participant has confirmed previous / current syphilis according to their medical history, or the participant has unknown or negative syphilis infection status. * The participant agrees to provide written informed consent. * The participant agrees to complete all aspects of the study. Additional inclusion criteria for frozen samples: * The ethics committee-required written informed consent for study testing, or required documentation for sample use from a commercial vendor, is available. * Sufficient volume for testing is available and the sample quality is adequate (for example no significant sample hemolysis) * The sample must have been collected in EDTA vacutainers or serum tubes, processed to plasma and the plasma frozen within 36 hours of blood collection. Exclusion Criteria: * Participant has already participated in this study on a previous occasion. * Participant is deemed vulnerable and / or unfit for participation in the study by the Investigator. * Participant is unwilling or unable to provide informed consent. * Participant is currently enrolled in a study to evaluate an investigational new drug or vaccine. Additional exclusion criteria for frozen samples * The sample has undergone more than one freeze thaw cycle * The sample has been kept at -20 °C (± 5 °C) longer than 12 months. If the sample has been kept longer than 12 months, the storage temperature must have been colder than -20 °C (± 5 °C).