Related Experiment Video
Updated: Jun 4, 2026

09:03
Forward Genetic Approaches in Chlamydia trachomatis
Published on: October 23, 2013
Pharyngeal Chlamydia trachomatis is not uncommon any more
Andreas Karlsson1, Anders Österlund, Annika Forssén
1Department of Public Health and Clinical Medicine, Family Medicine, Umeå University, Umeå, Sweden.
Scandinavian Journal of Infectious Diseases
|February 9, 2011
Summary
Pharyngeal Chlamydia trachomatis (Ct) infection is found in patients with persistent throat discomfort and is common in young people with genital Ct. Research should include women and consider gender in Ct prevention strategies.
Area of Science:
- Sexual health
- Infectious diseases
- Public health
Background:
- Chlamydia trachomatis (Ct) pharyngeal infections are under-researched, particularly in women.
- Previous studies primarily focused on homosexual and bisexual men.
- This study investigates pharyngeal Ct in patients with prolonged throat discomfort and sexually active young individuals.
Purpose of the Study:
- To determine the prevalence of pharyngeal Ct (PhCt) in patients experiencing long-lasting throat discomfort.
- To assess the prevalence of PhCt among young individuals with genital Ct infections.
- To explore the association between unprotected oral sex and PhCt in different genders.
Main Methods:
- Two sub-studies were conducted involving individuals aged 15-35.
- Sub-study 1: 48 participants with pharyngeal discomfort for over 14 days, tested for pharyngeal and genital Ct.
- Sub-study 2: 150 participants with genital Ct, tested for pharyngeal Ct. Both groups completed questionnaires on symptoms and sexual behavior.
Main Results:
- PhCt was detected in 4% of individuals with pharyngeal discomfort (Sub-study 1).
- In Sub-study 2, 12% of women and 7% of men with genital Ct tested positive for PhCt.
- Individuals with PhCt reported more upper respiratory tract symptoms.
Conclusions:
- Pharyngeal Ct infections occur in primary care patients with persistent throat discomfort.
- PhCt is prevalent in sexually active individuals with genital Ct infections.
- Heterosexual women showed higher rates of unprotected oral sex and PhCt infection compared to heterosexual men, highlighting the need for a gender-inclusive approach in research and prevention.
Related Concept Videos
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...
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...
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.
Chronic Pharyngitis
Chronic pharyngitis refers to persistent inflammation of the pharyngial mucosa.
Etiology
It often arises from persistent viral or bacterial infections affecting sinuses and tonsils.
Additional contributing factors include inadequate dental hygiene, mouth breathing, recurring tonsillitis, allergic rhinitis, laryngopharyngeal reflux, and exposure to smoke, chemicals, and other environmental pollutants. Allergic reactions to pollen, mold, and pet dander, chronic cough, excessive voice usage,...
Etiology
It often arises from persistent viral or bacterial infections affecting sinuses and tonsils.
Additional contributing factors include inadequate dental hygiene, mouth breathing, recurring tonsillitis, allergic rhinitis, laryngopharyngeal reflux, and exposure to smoke, chemicals, and other environmental pollutants. Allergic reactions to pollen, mold, and pet dander, chronic cough, excessive voice usage,...
Acute Pharyngitis
Introduction
Acute pharyngitis is the inflammation of the back of the throat (pharynx), commonly resulting in a sore throat. It is a frequently encountered condition that prompts individuals to seek medical advice.
Classification
Acute pharyngitis can be categorized based on its underlying cause:
Acute pharyngitis is the inflammation of the back of the throat (pharynx), commonly resulting in a sore throat. It is a frequently encountered condition that prompts individuals to seek medical advice.
Classification
Acute pharyngitis can be categorized based on its underlying cause:
Microbiota of the Respiratory Tract
The human respiratory tract, comprising the upper and lower segments, serves as a critical interface with the external environment. The upper respiratory tract (URT)—including the nostrils, sinuses, pharynx, and oropharynx—is heavily colonized by microbes, while the lower respiratory tract (LRT), composed of the larynx, trachea, bronchi, and lungs, was long thought to be sterile. However, recent molecular studies have revealed that the lungs are not devoid of microbes but act more like...
