Why get tested?
To screen for syphilis infection

When to get tested?
If you have symptoms of a syphilis infection, if you have another sexually transmitted disease (STD), or are pregnant

Sample required?
Usually a scraping from a chancre (ulcer or sore) in the affected area, a blood sample from a vein in your arm, or a spinal tap (lumbar puncture), depending on the test being used. Testing frequency as symptoms warrant.