Syphilis
GMJ News knowledge hub · last reviewed August 2026 · Georgian Medical Journal
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Syphilis — caused by Treponema pallidum — caused 7.1 million new infections and 133,000 deaths in 2020, with congenital syphilis (maternal transmission to the fetus) causing 710,000 cases including stillbirth, neonatal death and permanent disability, yet remaining treatable with benzathine penicillin G — a drug available since 1943 (WHO). Syphilis is experiencing a global resurgence: in the US, congenital syphilis increased 10-fold between 2014 and 2022 (362 to 3,882 cases) — a preventable tragedy. The classic four-stage presentation (primary chancre → secondary rash → latent → tertiary cardiovascular/neurosyphilis) makes syphilis the “great imitator” — among the most diagnostically challenging infections in medicine.
Key messages
7.1M new infections — 10x congenital surge in USA
Syphilis caused 7.1 million new infections and 133,000 deaths in 2020. In the USA, congenital syphilis increased 10-fold between 2014-2022 — a preventable tragedy from missed antenatal screening (WHO).
The great imitator — 4 stages
Syphilis progresses through four stages: primary (painless chancre); secondary (generalised rash including palms/soles, condylomata lata); latent (asymptomatic); and tertiary (cardiovascular syphilis, gummas, neurosyphilis). Each stage has distinct clinical features — no other infection mimics so many diseases.
Benzathine penicillin — still fully effective
Benzathine penicillin G remains the gold standard treatment for all stages of syphilis — remarkably, T. pallidum has developed NO resistance to penicillin in over 80 years of use. Single IM dose for early syphilis; 3 weekly doses for late latent.
Congenital syphilis — a preventable tragedy
Maternal syphilis causes stillbirth, neonatal death, bone/tooth deformities, sensorineural deafness, saddle nose deformity and neurosyphilis in neonates. Antenatal syphilis screening and treatment in the first half of pregnancy prevents virtually all congenital syphilis.
Syphilis and HIV
Syphilis and HIV are closely linked: genital ulcers (chancres) dramatically increase HIV transmission and acquisition (approximately 3-5 fold). Syphilis accelerates HIV disease progression; HIV alters syphilis serology and clinical presentation, making diagnosis more difficult.
Non-treponemal + treponemal serology
Diagnosis requires two-stage testing: non-treponemal tests (RPR or VDRL — quantitative, used to monitor treatment response); confirmed by treponemal tests (TPHA, FTA-ABS, TPPA — qualitative, remain positive for life after treatment).
Key statistics
Syphilis — four clinical stages and key features
Glossary of key terms
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Frequently asked questions 12 Q&A — structured for Google featured snippets and AI discovery
Knowledge hub: guidelines, conventions and reports
Organizations working in migration and health
Related health topics
STIsGonorrhoeaHIV/AIDSMaternal healthCongenital infectionYaws (related treponema)
About this hub. Produced by the GMJ News Editorial Team as a public-good service. Every statistic is linked to its primary source. Documents are preserved in the GMJ Repository with full attribution. Georgian Medical Journal · Contact the editorial team

