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Sexually Transmitted Infections

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Sexually transmitted infections (STIs) are diseases transmitted primarily through unsafe sexual interactions. Bacteria, viruses, or parasites cause them and can result in severe health complications if untreated.ChlamydiaThe bacterium Chlamydia trachomatis is responsible for the disease Chlamydia, the most common STI in the United States. This peculiar pathogen requires human cells to reproduce, residing intracellularly. The initial infection often goes unnoticed because it typically does not...

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Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
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Related Experiment Video

Updated: Jul 7, 2025

Author Spotlight: Advancing Syphilis Research — Innovations in Treponema pallidum Cultivation and Genetic Engineering

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Published on: January 24, 2025

Syphilis for dermatologists: Current concepts.

Jorge Navarrete¹, Stephanie Saavedra-Portales²

¹Department of Dermatology, Clínica Alemana, Universidad del Desarrollo, Santiago, Chile; Department of Dermatology and Sexually Transmitted Infections Clinic, Hospital Padre Hurtado, Santiago, Chile.

Clinics in Dermatology

|December 24, 2023

Summary

This summary is machine-generated.

This dermatology update focuses on modern sexually acquired syphilis, detailing its unique presentation, disease progression, and management. It highlights atypical variants and considerations for skin of color, offering clinical insights for dermatologists.

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Area of Science:

Dermatology
Infectious Diseases
Sexually Transmitted Infections

Background:

Syphilis remains a significant public health concern.
Classic presentations of syphilis are well-documented in dermatological literature.
Emerging trends and atypical manifestations necessitate updated clinical understanding.

Purpose of the Study:

To provide an updated overview of sexually acquired syphilis.
To elucidate novel features, pathophysiology, and natural history.
To describe atypical clinical variants, considerations for skin of color, and clinical pearls.

Main Methods:

Review of current literature and clinical observations.
Focus on recent advancements and emerging patterns in syphilis.
Exclusion of historical data, epidemiology, and congenital syphilis.

Main Results:

Sexually acquired syphilis presents with diverse and sometimes subtle manifestations.
Understanding pathophysiology aids in recognizing atypical variants.
Specific considerations are crucial for patients with darker skin tones.

Conclusions:

Dermatologists require updated knowledge to diagnose and manage contemporary syphilis.
Awareness of novel features and atypical presentations improves patient outcomes.
Clinical pearls enhance diagnostic accuracy and treatment strategies for syphilis.