Treponema pallidum is a bacterium that causes the disease syphilis. The primary objective of the study is to evaluate the testing performance of two diagnostic molecular techniques [quantitative polymerase chain reaction (qPCR) and transcription-mediated amplification (TMA)] for the detection of Treponema pallidum in maternal and neonatal specimens from participants with the diagnosis of syphilis using the Centers for Disease Control's (CDC's) Sexually Transmitted Infections (STI) Treatment Guidelines for adult and congenital syphilis.