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Related Concept Videos

Bacterial Phylum Spirochaetes01:30

Bacterial Phylum Spirochaetes

Spirochetes, unique bacteria in the phylum Spirochaetes, are gram-negative, motile, tightly coiled, slender, and flexible. They inhabit aquatic sediments and animals, with some causing diseases like syphilis. Spirochetes are classified into eight genera based on habitat, pathogenicity, phylogeny, and characteristics.Their distinctive motility arises from endoflagella, located within the cell’s periplasm. These endoflagella anchor at the cell poles and extend along the cell length, encased by a...
Ethics in Research01:56

Ethics in Research

Today, scientists agree that good research is ethical in nature and is guided by a basic respect for human dignity and safety. However, this has not always been the case. Modern researchers must demonstrate that the research they perform is ethically sound.
Sexually Transmitted Infections01:26

Sexually Transmitted Infections

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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Streptococcal Pharyngitis

Streptococcal pharyngitis, commonly known as “strep throat,” is an acute infection of the oropharyngeal tissues caused by the Gram‑positive Group A Streptococcus (Streptococcus pyogenes). Transmission occurs primarily through respiratory droplets expelled during coughing, sneezing, or talking.Mechanisms of Host Entry and Immune EvasionUpon entering the host, S. pyogenes adheres to the mucosal epithelial cells of the pharynx via surface proteins, notably lipoteichoic acid and the antiphagocytic...
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Amebiasis

Entamoeba histolytica, a protozoan parasite, is responsible for intestinal and extraintestinal amebiasis. Though a significant proportion of infections remain asymptomatic, approximately 50 million individuals annually are estimated to present with clinical disease, resulting in up to 100,000 deaths globally. The disease burden is disproportionately high in regions with lower socioeconomic status, such as parts of India, Africa, Mexico, and Latin America.Etiology and TransmissionThe infective...
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Related Experiment Video

Updated: Jun 30, 2026

Procedures for In Vitro Cultivation of Treponema pallidum, the Syphilis Spirochete
09:45

Procedures for In Vitro Cultivation of Treponema pallidum, the Syphilis Spirochete

Published on: January 24, 2025

[Syphilis--''to be or not to be"].

Hans Bredsted Lomholt1

  • 1Hudklinikken Vesterbro 99, DK-9000 Alborg. hans.lomholt@dadlnet.dk

Ugeskrift for Laeger
|October 1, 2008
PubMed
Summary

Syphilis, a great imitator, is increasing in Denmark and often overlooked. Increased physician awareness across specialties is crucial for timely diagnosis and treatment of this serious infection.

Area of Science:

  • Infectious Diseases
  • Dermatology
  • Pathology

Background:

  • Syphilis incidence is rising in Denmark.
  • The disease is known as a "great imitator" due to its diverse and often non-specific symptoms.
  • Delayed diagnosis of syphilis can lead to significant morbidity.

Observation:

  • Case 1: A patient with classic secondary syphilis symptoms was misdiagnosed for a year across multiple specialties.
  • Case 2: A penile lesion initially suspected as a syphilitic chancre was diagnosed as a rare inflammatory pseudotumor.
  • These cases highlight the diagnostic challenges posed by syphilis and similar-presenting conditions.

Findings:

  • Syphilis can present with varied symptoms, mimicking other conditions.
  • Diagnostic delays are common, even with classical presentations.

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Last Updated: Jun 30, 2026

Procedures for In Vitro Cultivation of Treponema pallidum, the Syphilis Spirochete
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Feeding of Ticks on Animals for Transmission and Xenodiagnosis in Lyme Disease Research

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  • Rare conditions can mimic primary syphilis chancres.
  • Implications:

    • Healthcare providers in all specialties need heightened awareness of syphilis.
    • Improved diagnostic vigilance is essential to prevent prolonged illness and complications.
    • Distinguishing syphilis from other conditions requires a comprehensive clinical and diagnostic approach.