Identifying unreported and undiagnosed cases of congenital syphilis in Arizona using live birth and fetal death registries.

To investigate the drop in reported congenital syphilis cases from 28 in 2005 to 16 in 2006, the Arizona infant registries were cross matched with reported syphilis test among women in th estat STD database. Six previously unreported cases were identified; four live births and two still births.