Related Experiment Video
Updated: May 26, 2026
09:45
Procedures for In Vitro Cultivation of Treponema pallidum, the Syphilis Spirochete
Published on: January 24, 2025
[Unusual faces of syphilis]
S C Sammet1, A Niedermeier, J Bogner
1Klinik und Poliklinik für Dermatologie und Allergologie, Ludwig-Maximilans-Universität München, Frauenlobstr. 9-11, 80337, München, Deutschland. stefanie.sammet@med.uni-muenchen.de
Summary
Syphilis, a resurgent disease, presents with varied symptoms, often mimicking other conditions. Early diagnosis with serological tests is crucial for effective treatment and managing co-infections like HIV.
Area of Science:
- Infectious Diseases
- Dermatology
- Public Health
Background:
- Syphilis (the "great masquerader") is experiencing a resurgence in Europe.
- Its diverse clinical presentations complicate diagnosis and necessitate its consideration in differential diagnoses.
Observation:
- This article highlights nine uncommon presentations of secondary syphilis.
- Four of these cases involved co-infection with the human immunodeficiency virus (HIV).
Findings:
- Serological tests are vital for accurate syphilis diagnosis.
- These tests enable stage-appropriate therapy and the exclusion of co-infections.
Implications:
- Increased vigilance for syphilis is required due to its rising incidence.
- Recognizing unusual presentations and co-infections, particularly HIV, is critical for patient management.
Related Concept Videos
01:26Sexually 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...
01:30Bacterial 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...
01:24Prosopagnosia
Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...
01:29Microbial Morphologies
Bacterial and archaeal cells exhibit remarkable diversity in shape and structure, critical in their adaptability and functionality. Among bacteria, the most commonly observed shapes include cocci and bacilli. Cocci are spherical and may exist singly or in groupings such as pairs (diplococci), chains (streptococci), clusters (staphylococci), or tetrads. Bacilli, in contrast, are rod-shaped and can also occur as single cells, in pairs, or chains, depending on their environmental and genetic...
01:18Other Unique Bacteria
Magnetic bacteria exhibit a directed movement called magnetotaxis, driven by structures called magnetosomes. These magnetosomes consist of chains of magnetic particles made of either magnetite (Fe₃O₄) or greigite (Fe₃S₄) and are organized in a linear conformation by a protein scaffold within invaginations of the cell membrane. The bacteria align along the north–south magnetic field lines, much like a compass needle. They are typically microaerophilic or anaerobic and are commonly found near the...
01:16Unusual Results
Unusual results are those that have a very low chance of occurring. Unusual results can be identified using probabilities and the range rule of thumb. In problems involving probability, unusual results can be observed in 2 instances – an unusually high number of successes or an unusually low number of successes.
According to the range rule of thumb, any value above or below two standard deviations, 2σ from the mean, μ is considered unusual.
Maximum unusual value = μ + 2σ
Minimum unusual value...
According to the range rule of thumb, any value above or below two standard deviations, 2σ from the mean, μ is considered unusual.
Maximum unusual value = μ + 2σ
Minimum unusual value...