syphilis
sexually transmitted infection
congenital syphilis
syphilis that results in a multisystem infection in the fetus via the placenta
primary syphilis
syphilis that is the first stage of syphilis, marked by the development of a chancre, which is characterized by mononuclear leukocytic infiltration, macrophages, and lymphocytes
secondary syphilis
syphilis characterized as the second stage of syphilis which appears from 2 to 6 months after primary infection, and is marked by lesions especially in the skin but also in organs and tissues, and that lasts from 3 to 12 weeks
tertiary syphilis
stage of syphilis that occurs fifteen to thirty years after the initial infection; it can include gumma formation and cardiovascular or central nervous system involvement (neurosyphilis)