Результаты поиска

Immunohistochemical Characterization of the Immune Response in Chronic Endometritis Caused by Chlamydia trachomatis.

In 2020, 128.5 million new chlamydia infections were reported worldwide in adults aged 15-49 years. Notably, the prevalence of Chlamydia trachomatis infection in pregnant women varies between 2% and 35%, correlating with increased risks of low birth weight, preterm birth, and neonatal death. C. trachomatis is a leading preventable cause of miscarriage. Recurrent first-trimester pregnancy loss can be induced by asymptomatic chlamydia infection through the immune response. In this study, we performed immunohistochemical characterization of the immune response in endometrial tissue biopsies from …

Characterization of the cell division-associated peptidoglycan amidase AmiA of Chlamydia trachomatis.

UNLABELLED: Chlamydia is an obligate intracellular bacterium that differentiates between infectious, non-dividing EBs and non-infectious, di … ng in the division septum. Here, we characterized the cell division-associated amidase, AmiA_Ct, of Chlamydia trachomatis both in vitro and in vivo. Our in vitro data show that AmiA_Ct is a bona fide, metal-dependent amidase capable of cleaving peptidoglycan. AmiA_Ct complemented an E. coli amidase-deficient strain and supported the growth and separation of daughter ce …

Synergism on Cancer Development of Human Papillomavirus and Chlamydia Trachomatis Co-Infection.

Human papillomavirus (HPV) and Chlamydia trachomatis (CT) co-infection is increasingly recognized not as a mere coincidence, but as a synergistic partnership that accelerates oncogenic progression across multiple tissues. This review synthesizes existing evidence into a "central-peripheral" framework, positioning cervical cancer as the central, mechanistically well-established model of cooperation, while malignancies such as head and neck, ovarian, and breast cancers represent the emerging, though less substantiated, peripheral extensions. This synthesis delineates an emerging paradigm of bidi…

Point-of-care Tests for Chlamydia trachomatis and Neisseria gonorrhoeae: Review of the Literature.

BACKGROUND: Point-of-care tests (POCTs) for the detection of Chlamydia trachomatis and Neisseria gonorrhoeae offer the potential for rapid diagnosis and treatment, improving patient outcomes and reducing disease transmission. We sought to compile evidence on the accuracy and clinical utility of molecular-based POCTs and near-POCTs for the detection of C. trachomatis and N. gonorrhoeae. METHODS: We performed a systematic literature search of 5 electronic databases from January 2009 to January 2024 to understand the performance characteristics and implementation considerations associated with F…

Risk factors associated with IgG seropersistence to Chlamydia trachomatis and Mycoplasma genitalium.

Sexually transmitted infections caused by Chlamydia trachomatis (Ct) and Mycoplasma genitalium (Mg) have significant implications both at the individual and societal levels. Our study evaluated various co-factors associated with persistent serum IgG-antibodies to Ct and Mg. Three hundred and twenty nine pregnant women and 135 men from the Finnish Family HPV study were analyzed for serum IgG-antibodies of pGP3 for Ct and MgPa and rMgPa for Mg using multiplex serology. Seropersistence to both Ct and Mg was more common in women (30.4% and 13.3%) than in men (17.4% and 5.3%). The number of lifetim…

Chlamydia trachomatis induces disassembly of the primary cilium to promote the intracellular infection.

Chlamydia trachomatis is a clinically important bacterium that infects epithelial cells of the genitourinary and respiratory tracts and the eye. These differentiated cells are in a quiescent growth state and have a surface organelle called a primary cilium, but the standard Chlamydia cell culture infection model uses cycling cells that lack primary cilia. To investigate if these differences are relevant, we performed infections with host cells that have a primary cilium. We found that C. trachomatis caused progressive loss of the primary cilium that was prevented by disrupting Aurora A (AurA),…

Correlation of Clinical Severity of Trachomatous Inflammation and Chlamydia trachomatis Bacterial Load.

The purpose of this study was to investigate the correlation between bacterial load of Chlamydia trachomatis as measured from quantitative polymerase chain reaction (qPCR) and the relative clinical severity of trachomatous inflammation. Individuals with trachoma from rural communities in Ethiopia had photographs taken as well as swabs obtained of the upper tarsal conjunctivas. Conjunctival swabs were processed with PCR assay, which provided quantitative results of ocular chlamydial load. A series of 125 conjunctival photographs were ranked from least to most severe according to clinical severi…

Heterologous Display of Chlamydia trachomatis PmpD Passenger at the Surface of Salmonella OMVs.

Chlamydia trachomatis is the bacterial pathogen that causes most cases of sexually transmitted diseases annually. To combat the global spread of asymptomatic infection, development of effective (mucosal) vaccines that offer both systemic and local immune responses is considered a high priority. In this study, we explored the expression of C. trachomatis full-length (FL) PmpD, as well as truncated PmpD passenger constructs fused to a "display" autotransporter (AT) hemoglobin protease (HbpD) and studied their inclusion into outer membrane vesicles (OMVs) of Escherichia coli and Salmonella Typhim…

Transformation and Mutagenesis of Chlamydia trachomatis and C. muridarum Utilizing pKW Vector.

A gene deletion by allelic exchange via homologous recombination from a bacterial genome represents a valuable genetic tool for studying a role(s) of determinants involved in various aspects of pathogenesis. Due to chlamydial obligate intracellular lifestyle and comparatively low transformation rate, the mutagenesis of Chlamydia utilizes types of suicide vectors that have to be maintained and propagated by the bacteria throughout several rounds of their intracellular developmental cycle. These deletion constructs must be lost by chlamydiae once null mutant formation is achieved. pKW is a small

Use of viability PCR for detection of live Chlamydia trachomatis in clinical specimens.

BACKGROUND: The current testing approach to diagnose Chlamydia trachomatis (CT) infection relies on nucleic acid amplification tests (NAATs). These tests are highly sensitive, but do not distinguish between active infection and residual bacterial nucleic acid which may remain after resolution of infection, or via cross-contamination. Better methods to assess the viability of CT detected in clinical samples would be useful in determining the relevance of CT detection in a variety of clinical settings. The goal of this study was to test viability PCR (vPCR) as a method to distinguish viable bact…

Chlamidia trachomatis - Конкретные антителные ответные меры у женщин Камеруна со вторичной бесплодием.

Вклад хламидии во вторичную бесплодие женщин малоизвестен. Из 404 женщин, участвовавших в предыдущем исследовании в Камеруне, 142 имели вторичную бесплодие (дело) и 262 были беременны без каких-либо случаев бесплодия (контроль), а серопозитивность хламидии трахоматиса составила 92%. Серопозитивность не отличалась существенными различиями в зависимости от состояния дел/контроля.

Совпадение в аннотации оригинала
The contribution of chlamydia to secondary infertility in women is poorly understood. Among 404 female participants enrolled in a previous study in Cameroon, 142 had secondary infertility (cases) and 262 were pregnant with no history of infertility (controls) , Chlamydia trachomatis seropositivity was 92%. Seropositivity did not significantly differ by case/…

Potential mitigating role of ivermectin on the spread of Chlamydia trachomatis by Musca sorbens.

Trachoma is the world's most frequent cause of blindness from an infectious agent. The disease caused by infection is associated with lack of access to sanitation and low hygiene standards. Trachoma is controlled through the Surgery, Antibiotics, Facial cleanliness, and Environmental improvement (SAFE) strategy, which delivers azithromycin (AZM) mass drug administration (MDA) in endemic areas. The putative vector Musca sorbens principally reproduce in human faecal matter left in the environment due to open defecation. Ivermectin (IVM) is on the WHO's essential medicines list and is administere

Chlamydia trachomatis and the HLA involvement in the development of infection and disease: a narrative review.

INTRODUCTION: CT (Chlamydia trachomatis) is among the most common pathogens leading to sexually transmitted diseases. Considering the uncertain mechanism by which HLA polymorphisms influence the CT infection, reinfection, comorbidities or evolution and because there is no consensus regarding the alleles involved in the pathogenesis of the infection, we considered necessary to perform a review to summarize the current knowledge of HLA related to CT. METHODS: Pubmed was researched using key terms. Out of the 198 results found, we analyzed articles of all types which describe how the MHC, throug…

Усиление стрессовой ситуации в области питания способствует стойкости в хламидио-трахоматисе.

Стойкость, жизнеспособное, но не воспроизводимое состояние роста, причастна к болезням, вызванным трахоматисом хламидии. Голодание отдельных питательных веществ приводит к поверхностно аналогичному стойкому состоянию, что подразумевает конвергенцию общей внутриклеточной среды. Мы использовали двойную последовательность RNA-патогена в условиях как железа, так и триптофана для систематической характеристики стойкого хламидиального транскриптома и определения общего вклада реакции на транскрипцию стрессовой системы камеры в формировании внутриклеточной среды. Расшифровка инфицированных клеток нос

Совпадение в аннотации оригинала
Persistence, a viable but non-replicating growth state, has been implicated in diseases caused by Chlamydia trachomatis. Starvation of distinct nutrients produces a superficially similar persistent state, implying convergence on a common intracellular environment. We employed host-pathogen dual RNA-sequencing under both iron- and tryptophan-starved condition…

Synthesis of erythrodiol C-ring derivatives and their activity against Chlamydia trachomatis.

To develop new potential agents against Chlamydia trachomatis among oleanane type triterpenoids the synthesis, spectral and X-ray analysis as well as antimicrobial screening of C-12 oxygen and nitrogen derivatives of erythrodiol is presented. The reduction of methyl 3β-acetoxy-12-oxo-oleanoate with LiAlH4 led to isomeric erythrodiol 12β- and 12α-hydroxy-derivatives, their stereochemistry with respect to the position of hydroxyl-group at C-12 was determined based on the multiplets splitting patterns, the magnitude of the spin-spin interaction, and NOESY interactions. Methyl 3β-acetoxy-12-oxo-ol…

[Prevalence of Chlamydia trachomatis infection and a potential perinatal impact in Chilean patients].

Chlamydia trachomatis is the most frequent bacterial sexually transmitted disease around the world. Estimated prevalence by WHO is 4,2% for women. Most cases are asymptomatic, but complications in fertility and during pregnancy are possible. The aim of this review is to describe the prevalence of C. trachomatis in Chilean studies using polymerase chain reaction (PCR) for detection, to describe the possible perinatal complications, to know recommendations about pregnancy screening in other countries, and to discuss the possibility of implementing in Chile.

In Vitro and In Vivo Activity of (Trifluoromethyl)pyridines as Anti-Chlamydia trachomatis Agents.

Chlamydia trachomatis is the leading pathogen in sexually transmitted bacterial infections across the globe. The development of a selective treatment against this pathogen could be an attractive therapeutic option that will reduce the overuse of broad-spectrum antibiotics. Previously, we reported some sulfonylpyridine-based compounds that showed selectivity against C. trachomatis. Here, we describe a set of related compounds that display enhanced anti-chlamydial potency when compared to our early leads. We found that the active molecules are bactericidal and have no impact on Staphylococcus au…

An inducible transposon mutagenesis approach for the intracellular human pathogen Chlamydia trachomatis.

Background: Chlamydia trachomatis is a prolific human pathogen that can cause serious long-term conditions if left untreated. Recent developments in Chlamydia genetics have opened the door to conducting targeted and random mutagenesis experiments to identify gene function. In the present study, an inducible transposon mutagenesis approach was developed for C. trachomatis using a self-replicating vector to deliver the transposon-transposase cassette - a significant step towards our ultimate aim of achieving saturation mutagenesis of the Chlamydia genome. Methods: The low transformation efficien…

Streptococcus agalactiae and Chlamydia trachomatis detection in women without symptoms of infection.

BACKGROUND: Chlamydia trachomatis (C. trachomatis) and Streptococcus agalactiae (GBS) may be present in the female cervical canal without any symptoms of infection. Chronic chlamydial infections lead to many serious complications and perinatal infections, while the presence of GBS is a reservoir for infections of newborns or invasive streptococcal infection in adults. OBJECTIVES: To examine healthy women for C. trachomatis without symptoms from the reproductive system, assess the frequency of asymptomatic infections, detect GBS in the cervical canal, demonstrate differences in drug susceptibi…

Prevalence of genital Chlamydia trachomatis infection in the general population: a meta-analysis.

BACKGROUND: Estimating prevalence of Chlamydia trachomatis (CT) worldwide is necessary in designing control programs and allocating health resources. We performed a meta-analysis to calculate the prevalence of CT in the general population. METHODS: The Pubmed and Embase databases were searched for eligible population-based studies from its inception through June 5, 2019. Q test and I2 statistic were used to calculate the heterogeneity between studies. Random effects models were used to pool the prevalence of CT. Meta regression was performed to explore the possible sources of heterogeneity. P…