The incidence of congenital syphilis has recently reached epidemic pro
portions. With the resurgence of this important clinical entity, curre
ntly recommended screening procedures may be inadequate. We describe t
hree cases that highlight the limitations of these screening procedure
s. All these infants had associated maternal risk factors for congenit
al syphilis, such as poor prenatal care and illicit drug use. All the
infants and mothers were seronegative for syphilis at the time of birt
h but the infants became seropositive at 2 months of age. These cases
support the need to reexamine current screening policies. In addition
to prenatal and at-delivery screenings for congenital syphilis, it may
be appropriate to screen infants born to high-risk mothers at 4 to 8
weeks of age.