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Sexually Transmitted Infections

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...

Bacterial Phylum Chlamydiae

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 of...

Trichomoniasis

Trichomoniasis

Trichomonas vaginalis is a flagellated protozoan parasite and the causative agent of trichomoniasis, one of the most prevalent non-viral sexually transmitted infections in the United States. This extracellular parasite primarily colonizes the lower genitourinary tract in women—particularly the vagina—and in men, the urethra and prostate. Its structural and functional adaptations enable its survival, motility, and pathogenicity within the host environment.Structural Features and Host EntryT.

Genital Herpes

Genital Herpes

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Amebiasis

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Bacterial Phylum Spirochaetes

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Updated: Jun 17, 2026

Forward Genetic Approaches in Chlamydia trachomatis

Forward Genetic Approaches in Chlamydia trachomatis

Published on: October 23, 2013

[Chlamydia in sweden.].

|January 13, 2010

Summary

Chlamydial identification in Sweden has evolved from limited laboratory testing to widespread use of diverse methods. DNA amplification tests are expected to improve standardization for Chlamydia diagnosis.

Area of Science:

Microbiology
Infectious Diseases
Public Health

Context:

Chlamydial infections were hyper-endemic in Sweden until the 1980s, with an estimated 100,000 cases annually.
Diagnostic capabilities for Chlamydia were limited in the late 1970s, with only five laboratories performing cultures.

Purpose:

To describe the evolution of Chlamydial identification methods in Sweden.
To highlight the challenges of standardization in Chlamydia diagnostics.

Summary:

Over 33 laboratories now perform Chlamydial identification, utilizing various tests with a noted lack of standardization.
The introduction of DNA amplification tests is anticipated to enhance diagnostic consistency.
An epidemiological approach to managing contagious diseases was adopted in Sweden in 1988.

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Using Fluorescent Proteins to Visualize and Quantitate Chlamydia Vacuole Growth Dynamics in Living Cells

Using Fluorescent Proteins to Visualize and Quantitate Chlamydia Vacuole Growth Dynamics in Living Cells

Published on: October 13, 2015

A Human Fallopian Tube Model for Investigation of C. trachomatis Infections

A Human Fallopian Tube Model for Investigation of C. trachomatis Infections

Published on: August 11, 2012

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Last Updated: Jun 17, 2026

Forward Genetic Approaches in Chlamydia trachomatis

Forward Genetic Approaches in Chlamydia trachomatis

Published on: October 23, 2013

Using Fluorescent Proteins to Visualize and Quantitate Chlamydia Vacuole Growth Dynamics in Living Cells

Using Fluorescent Proteins to Visualize and Quantitate Chlamydia Vacuole Growth Dynamics in Living Cells

Published on: October 13, 2015

A Human Fallopian Tube Model for Investigation of C. trachomatis Infections

A Human Fallopian Tube Model for Investigation of C. trachomatis Infections

Published on: August 11, 2012

Impact:

Improved diagnostic standardization for Chlamydia is expected with newer technologies.
Enhanced epidemiological surveillance and control of Chlamydial infections in Sweden.