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Using Epidemiology, Immunology, and Genomics to Study the Biology of Chlamydia trachomatis.

The traditional framework in which to study the biology of human infectious diseases involves characterizing interactions and features of the host, pathogen, and environment. Using the tools of epidemiology, immunology, and genomics allows one to study the biology of infectious disease within this framework. The study of Chlamydia trachomatis biology vividly illustrates the usefulness for the approach. I note key findings from my own studies on C. trachomatis epidemiology, immunology, and genomics to show how important light has been shed on its biology and how this has impacted the Chlamydia …

Universal Prenatal Screening and Testing and Chlamydia trachomatis Conjunctivitis in Infants.

We retrospectively reviewed all infant Chlamydia trachomatis eye cultures submitted to the Chlamydia Research Laboratory from 1986 to 2002. The positivity rate was 15.6% during the period before the implementation of universal prenatal screening (1986-1993) compared with 1.8% during the screening period (1994-2002).

Chlamydia Trachomatis Infection: Their potential implication in the Etiology of Cervical Cancer.

Pathogenic bacterial strains can alter the normal function of cells and induce different levels of inflammatory responses that are connected to the development of different diseases, such as tuberculosis, diarrhea, cancer etc. Chlamydia trachomatis (C. trachomatis) is an intracellular obligate gram-negative bacterium which has been connected with the cervical cancer etiology. Nevertheless, establishment of causality and the underlying mechanisms of carcinogenesis of cervical cancer associated with C. trachomatis remain unclear. Studies reveal the existence of C. trachomatis in cervical cancer …

Alterations of Vaginal Microbiota in Women With Infertility and Chlamydia trachomatis Infection.

Chlamydia trachomatis (C. trachomatis) is the most common etiological agent of bacterial sexually transmitted infections (STIs) worldwide and causes serious health sequelae such as cervicitis, pelvic inflammatory disease, and even infertility if ascending from the lower to the upper female genital tract. Previous studies have revealed the pivotal role of vaginal microbiota in susceptibility to STIs. However, alterations in the vaginal microbiota in women who are infertile and infected with C. trachomatis remain unknown. This study used metagenomic analysis of sequenced 16S rRNA gene amplicons …

Peritoneal Chlamydia trachomatis Infection as a Cause of Ascites: A Diagnosis Not to Be Missed.

Ascites is a common complication of several conditions, but it is rare in cases of Chlamydia trachomatis infection. We report a 36-year-old patient presenting with abdominal swelling for a week prior to hospitalization. An extensive workup excluded liver or heart disease and malignancy. A computed tomography scan demonstrated massive ascites and severe thickening of peritoneal reflections. Laboratory tests showed low serum-ascites albumin gradient, high total protein, and low adenosine. Diagnostic laparoscopy revealed inflammatory signs of both fallopian tubes. The histopathological results fr…

Persistence and Significance of Chlamydia trachomatis in the Housefly, Musca domestica L.

Trachoma is the leading cause of infectious blindness worldwide. Ocular infection by the obligate intracellular pathogen, Chlamydia trachomatis, causes the eyelashes to turn in and scratch the cornea, leading to blindness if left untreated. The disease is most prevalent in poor, rural communities that lack the infrastructure for basic hygiene, clean water, and proper sanitation. Infection is often spread through infected clothes, contaminated hands, and face seeking flies. The goal of this research was to understand the biological role of Musca domestica flies in the transmission of C. trachom…

Effect of Chlamydia trachomatis on adverse pregnancy outcomes: a meta-analysis.

PURPOSE: To analyze the effect of Chlamydia trachomatis (C. trachomatis) on adverse pregnancy outcomes based on the currently available evidence. METHODS: Multiple databases were comprehensively searched from the available date of inception through December 9, 2019. The effect of C. trachomatis on adverse pregnancy outcomes was assessed using pooled odds rations (ORs) and 95% confidence intervals (CIs). Egger's test was used for publication bias. RESULTS: Fifty studies involving 502,141 participants were identified. C. trachomatis infection was found to be associated with preterm birth in an…

Azithromycin in the treatment of rectogenital Chlamydia trachomatis infections: end of an era?

INTRODUCTION: Azithromycin was recommended as the first-line therapeutic regimen for treatment of genital infections in men and women by the Centers for Disease Control in 1998. A series of studies of azithromycin for treatment of rectal chlamydial infection in men who have sex with men (MSM) found that azithromycin was significantly less effective than doxycycline. AREAS COVERED: Literature on treatment of rectal C. trachomatis from 2000 through May 2020 was searched using PubMed. Retrospective and observational studies were identified documenting the frequency and treatment of rectal chlamy

Chlamydia trachomatis in the gingival sulcus and pharynx in patients of Northeast Mexico.

BACKGROUND: The oral microenvironment provides the conditions for the establishment of microorganisms not usually considered residents of the normal oral microbiota. Sexually transmitted microorganisms such as Chlamydia trachomatis can adhere to any mucosal surface and ascend to reach appropriate locations to survive and develop symptomatic infections. MATERIALS AND METHODS: To determine the presence of C. trachomatis, direct immunofluorescence of this microorganism was carried out in 76 randomly selected patients attending a periodontal clinic during a period of 1 year. Samples from the ging…

Sirenomelia and maternal chlamydia trachomatis infection: a case report and review.

Background: Sirenomelia is a lethal congenital anomaly, presenting with fusion of lower extremities and malformed perineum. The pathogenesis is unclear, and "defective blastogenesis" is the proposed mechanism. Chlamydia trachomatis (CT) is an obligate intracellular pathogen which reportedly invades placenta and may result in fetal demise. It has documented cytopathogenic effects, specifically, cellular disruption, tissue dysgenesis, and genomic instability.Case report: An infant with sirenomelia was born as a product of 30 weeks of pregnancy, which was normal except for a persistent maternal C…

Инвитромодель, вызванная азитромицином, стойкой хламидией трахоматисной инфекции.

Однодозный азитромицин рекомендуется для лечения хламидиотрахоматисов. Здесь мы создали клеточную модель стойкой инфекции, вызванной азитромицином. Азитромицин препятствовал репликации трахоматиса в зависимости от дозы. Электронная микроскопия указывает на то, что небольшие включения в индуцируемую модель содержат расширенные, аберрантные и неинфекционные ретикулирующие тела. RT-PCR показал, что C. trachomatis все еще способен выразить необработанный ген 16S rRNA в модели и что C. trachomatis восстанавливается после удаления азитромицина с пиковым временем восстановления 24 часа. Мутации в 23S

Совпадение в аннотации оригинала
Single-dose azithromycin is recommended for treating Chlamydia trachomatis infections. Here, we established an in vitro cell model of azithromycin-induced persistent infection. Azithromycin inhibited the replication of C. trachomatis in a dose-time-dependent manner. Electron microscopy indicated that small inclusions in the induced model contained enlarged, …

Chlamydia trachomatis Frequency in a Cohort of HPV-Infected Colombian Women.

BACKGROUND: Chlamydia trachomatis (C. trachomatis), an obligate intracellular bacterium, is the commonest infectious bacterial agent of sexual transmission throughout the world. It has been shown that the presence of this bacteria in the cervix represents a risk regarding HPV persistence and, thereafter, in developing cervical cancer (CC). Prevalence rates may vary from 2% to 17% in asymptomatic females, depending on the population being analysed. This study reports the identification of C. trachomatis in a cohort of 219 HPV-infected Colombian females. METHODS: C. trachomatis infection freque…

A Functional Core of IncA Is Required for Chlamydia trachomatis Inclusion Fusion.

UNLABELLED: Chlamydia trachomatis is an obligate intracellular pathogen that is the etiological agent of a variety of human diseases, including blinding trachoma and sexually transmitted infections. Chlamydiae replicate within a membrane-bound compartment, termed an inclusion, which they extensively modify by the insertion of type III secreted proteins called Inc proteins. IncA is an inclusion membrane protein that encodes two coiled-coil domains that are homologous to eukaryotic SNARE (soluble N-ethylmaleimide-sensitive factor attachment receptor) motifs. Recent biochemical evidence suggests …

Optimization of candidate proteins for serological screening of Chlamydia trachomatis infection.

The aim of this study was to optimize candidate antigen proteins for serological screening of Chlamydia trachomatis infection. C. trachomatis positive serum and swabs of genital secretions were collected from 50 patients in the Tianjin Medical University General Hospital, as well as from 30 patients negative for C. trachomatis. Samples were assessed by colloidal gold assay in a sexually transmitted disease clinic as follows: serum antibodies for eight kinds of C. trachomatis immunodominant proteins (Pgp3, CPAF, CT143, CT101, CT694, CT875, CT813, and IncA) were detected, and two traditional gol…

Analysis of patients with Chlamydia trachomatis genital infection in an STD clinic.

INTRODUCTION AND OBJECTIVES: Chlamydia trachomatis genital infection is common in our setting and early treatment can prevent complications. The aim of this study was to report on patients diagnosed with C trachomatis genital infection in a sexually transmitted disease (STD) clinic. MATERIAL AND METHODS: This was a descriptive, cross-sectional, observational study of patients diagnosed with C. trachomatis infection between 2010 and 2011. We recorded demographic data and information on sexual habits, concomitant sexually transmitted infections (STIs), and various aspects of treatment. RESULTS…

Prevalence of Chlamydia trachomatis infection in the general population of women in Qatar.

OBJECTIVES: The Arabian Gulf region has limited epidemiological data related to sexually transmitted infections. The objective of this study was to estimate the prevalence of Chlamydia trachomatis infection among general population women in Doha, Qatar. METHODS: Endocervical swabs were collected from healthy women attending primary healthcare centres in Doha, June-December 2008. The specimens were tested for C trachomatis by a commercially available PCR-based assay. Data on basic socio-demographic characteristics, medical history and sexual behaviour were obtained using self-administered ques…