Treponema pallidum, the syphilis spirochete: making a living as a stealth pathogen

Justin D Radolf1, Ranjit K Deka2, Arvind Anand3

  • 1Departments of Medicine, Pediatrics, Genetics and Genomic Science, Molecular Biology and Biophysics, and Immunology, UConn Health, 263 Farmington Avenue, Farmington, Connecticut 06030-3715, USA.

Insights

Syphilis infections are increasing globally. This review explores the structural and regulatory factors enabling the syphilis spirochete (Treponema pallidum) to evade immune responses and cause disease.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Pathogenesis

Background:

  • Worldwide resurgence of Treponema pallidum subsp. pallidum infections.
  • Syphilis spirochete known as 'the stealth pathogen' due to early dissemination and immune evasion.
  • Challenges in studying syphilis pathogenesis include inability to culture and genetically manipulate T. pallidum.

Purpose of the Study:

  • To integrate recent findings on T. pallidum pathogenicity.
  • To provide fresh insights into the parasitic lifestyle of the syphilis spirochete.
  • To review structural, physiological, and regulatory aspects of T. pallidum.

Main Methods:

  • Literature review and synthesis of existing research.
  • Integration of diverse information on T. pallidum.
  • Analysis of structural, physiological, and regulatory facets of pathogenicity.

Main Results:

  • Considerable progress made in understanding T. pallidum pathogenicity.
  • Elucidation of key factors contributing to syphilis spirochete's success.
  • Insights gained into immune evasion and dissemination mechanisms.

Conclusions:

  • Syphilis spirochetes employ sophisticated strategies for parasitic survival.
  • Further research can build upon recent advances in understanding T. pallidum.
  • Understanding these mechanisms is crucial for combating the syphilis resurgence.

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...
1.1K
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...
1.5K
Bacterial Phylum Chlamydiae01:29

Bacterial Phylum Chlamydiae

The phylum Chlamydiae or Chlamydiota is composed of a single order, Chlamydiales. This phylum consists entirely of obligate intracellular parasites that infect eukaryotic hosts. While human pathogens within this group have been studied extensively, the phylum encompasses many species capable of interacting with various eukaryotic organisms. Members of Chlamydiae are typically small cocci, approximately 0.5 μm in diameter, and exhibit a distinctive developmental cycle. As is characteristic...
686
Bacterial Phylum Tenericutes01:24

Bacterial Phylum Tenericutes

The phylum Tenericutes, which includes the single class Mollicutes, comprises bacteria that lack cell walls. The term "Mollicutes" derives from the Latin word mollis, meaning "soft." These organisms are among the smallest known and are commonly referred to as mycoplasmas due to the prominence of the genus Mycoplasma, which includes well-known human pathogens. Despite their inability to stain gram-positively (a result of their lack of cell walls), mycoplasmas are phylogenetically related to the...
565
Fungal Phylum Microsporidia01:28

Fungal Phylum Microsporidia

Microsporidia are a group of obligate intracellular fungi that were initially classified as protists but were later reclassified based on phylogenetic, molecular, and structural evidence linking them to the Chytridiomycota. These unicellular, non-motile organisms are highly specialized parasites that infect a wide range of animal hosts, including humans. They have evolved extensive genomic and metabolic reductions, making them highly dependent on their hosts for survival.Morphology and Genomic...
667
Pulmonary Tuberculosis II01:28

Pulmonary Tuberculosis II

Tuberculosis, or TB, is a bacterial infectious disease caused by Mycobacterium tuberculosis. While its primary impact is on the lungs, leading to pulmonary tuberculosis, it can also affect various other organs, a condition referred to as extrapulmonary tuberculosis.
Here is a detailed explanation of its pathophysiology:
Transmission: The process begins when a person inhales droplet nuclei containing M. tuberculosis. These are typically released into the air when an individual with pulmonary or...
1.9K