If untreated, late congenital syphilis may occur in 40%, including saddle nose deformation, Higouménakis sign, saber shin, or Cluttons joints among others. Infection during pregnancy is also associated with miscarriage. The three main dental defects in congenital syphilis are Hutchinsons incisors (screwdriver shaped incisors), Moons molars or bud molars, and Fourniers molars or mulberry molars (molars with abnormal occlusal anatomy resembling a mulberry). Cause
Bacteriology
Treponema pallidum subspecies pallidum is a spiral-shaped, Gram-negative, highly mobile bacterium. Three other human diseases are caused by related Treponema pallidum subspecies, including yaws (subspecies pertenue), pinta (subspecies carateum) and bejel (subspecies endemicum). Unlike subspecies pallidum, they do not cause neurological disease. Humans are the only known natural reservoir for subspecies pallidum. It is unable to survive more than a few days without a host. This is due to its small genome (1.14Mbp) failing to encode the metabolic pathways necessary to make most of its macronutrients. It has a slow doubling time of greater than 30 hours. The bacterium is known for its ability to evade the immune system and its invasiveness. Transmission
Syphilis is transmitted primarily by sexual contact or during pregnancy from a mother to her baby; the spirochete is able to pass through intact mucous membranes or compromised skin. It is thus transmissible by kissing near a lesion, as well as oral, vaginal, and anal sex. Approximately 30% to 60% of those exposed to primary or secondary syphilis will get the disease.
Medically directed mercury poisoning also became widespread, and thousands died in desperate attempts to rid themselves of the excruciating, disfiguring, and humiliating illness. Early infections
The first-line treatment for uncomplicated syphilis (primary or secondary stages) remains a single dose of intramuscular benzathine benzylpenicillin. Doxycycline and tetracycline are alternative choices for those allergic to penicillin; due to the risk of birth defects, these are not recommended for pregnant women. Resistance to macrolides, rifampicin, and clindamycin is often present. Ceftriaxone, a third-generation cephalosporin antibiotic, may be as effective as penicillin-based treatment. It is recommended that a treated person avoid sex until the sores are healed. Late infections
For neurosyphilis, due to the poor penetration of benzathine penicillin into the central nervous system, those affected are given large doses of intravenous penicillin G for a minimum of 10 days. If a person is allergic to penicillin, ceftriaxone may be used or penicillin desensitization attempted. Other late presentations may be treated with once-weekly intramuscular benzathine penicillin for three weeks. Treatment at this stage solely limits further progression of the disease and has a limited effect on damage which has already occurred. Serologic cure can be measured when the non-treponemal titers decline by a factor of 4 or more in 6–12 months in early syphilis or 12–24 months in late syphilis. Jarisch–Herxheimer reaction
One of the potential side effects of treatment is the Jarisch–Herxheimer reaction. It frequently starts within one hour and lasts for 24 hours, with symptoms of fever, muscle pains, headache, and a fast heart rate.