Advances in Syphilis Diagnostics to Address the 21st-Century Epidemic

Area of Science:

• Infectious Diseases
• Epidemiology
• Clinical Microbiology

Background:

• The United States faces a syphilis epidemic, with cases rising over 30-fold since 2000 to over 209,000 in 2023.
• Congenital syphilis cases have increased tenfold in the last decade, highlighting challenges in disease control.
• Factors hindering syphilis containment include treatment shortages, antibiotic resistance, and diagnostic limitations.

Purpose of the Study:

• To review current epidemiologic trends of syphilis in the US.
• To discuss gold-standard and emerging diagnostic methods for syphilis detection.
• To identify key challenges faced by laboratorians in managing syphilis.

Main Methods:

• Review of epidemiologic data on syphilis trends.
• Analysis of current and novel diagnostic techniques.
• Examination of challenges in syphilis diagnosis and treatment.

Main Results:

• Syphilis incidence has dramatically increased, particularly among women and men who have sex with women.
• Treatment options are limited by penicillin shortages and macrolide resistance.
• Current diagnostic tests have limitations in sensitivity and can cause delays.

Conclusions:

• Public health interventions, including doxycycline post-exposure prophylaxis, show promise in disease control.
• Serologic testing remains crucial for syphilis screening and diagnosis due to its cost-effectiveness and sensitivity.
• Investment in public health infrastructure, data sharing, and addressing social determinants are vital for reducing syphilis rates.