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Chlamydia trachomatis: important relationships to race, contraception, lower genital tract infection, and Papanicolaou smear.

Chlamydia trachomatis is a common cause of sexually transmitted disease in adolescent girls. Of 366 adolescent patients screened, 15.3% were found to have chlamydial endocervical infections, with an infection rate of 23.3% in blacks, 14.3% in Hispanics, and 10.3% in whites (P = 0.01, excess for blacks). Of Chlamydia-positive patients, 63.6% had a diagnosis of lower genital tract infection, compared with 35.4% of Chlamydia-negative patients (P = 0.004). Oral contraceptive users had a higher prevalence of infection (23.8%) compared with those using a barrier method (16.2%) or with nonusers (9.3%…

Pelvic inflammatory disease associated with Chlamydia trachomatis infection after therapeutic abortion. A prospective study.

Chlamydia trachomatis was cultured from the cervix of 70 of 557 (12.6%) patients admitted for therapeutic abortion. Postoperatively, 22 (3.9%) developed acute pelvic inflammatory disease (PID); of these women, 14 (63.6%) had harboured C trachomatis in the cervix before the abortion. Thus of 70 patients with chlamydial infection, 14 (20%) developed PID postoperatively. Of the chlamydia-positive patients, six of the 15 (40%) aged less than 20 years and eight of the 53 (15%) patients aged 20-30 years developed PID. Twelve of the 70 women with chlamydial infections showed a significant increase in…

Chlamydia trachomatis associated with chronic inflammation in abdominal specimens from women selected for tuboplasty.

Chronic inflammation is a frequent cause of tuboplasty failure. Therefore, it would be useful for one to know the microbiologic agent of infection and to treat it before the tuboplasty. By laparoscopy, a search for Chlamydia trachomatis, Ureaplasma urealyticum, and other microbiologic agents was carried out in the peritoneum and tubes of 118 women divided into 3 groups. Sixty-nine had a checkup before tuboplasty, of which 30 were found to have a chronic inflammatory condition discovered during laparoscopy (group 1) and 39 to have no sign of inflammation (group 2). Forty-nine women with a compl…

Experimental pelvic inflammatory disease provoked by Chlamydia trachomatis and Mycoplasma hominis in grivet monkeys.

Pelvic inflammatory disease was produced by inoculation with Mycoplasma hominis and Chlamydia trachomatis directly into the fallopian tubes of grivet monkeys. The effects of various routes of infection were examined. The method of inoculation with the infecting agent influenced the resulting clinical spectrum. In these monkeys significant changes in humoral antibodies occurred with inflammation caused by both M. hominis and C. trachomatis. Development of cellular antibodies against M. hominis could be demonstrated in all experimentally infected monkeys, whereas no such antibodies could be dete…

Chlamydia trachomatis is present and metabolically active during the remitting phase in synovial tissues from patients with chronic Chlamydia-induced reactive arthritis.

BACKGROUND: Patients with chronic Chlamydia-induced reactive arthritis (ReA) often show a remitting-relapsing disease phenotype. Some information regarding bacterial and host responses to one another during active disease is available but no information for quiescence. This article presents the first molecular genetic insight into the behavior of bacterium and host during remitting ReA. METHODS: Synovial biopsies were procured from the knees of 4 patients with quiescent ReA by the Parker-Pearson technique. Nucleic acids prepared from them were analyzed by real-time polymerase chain reaction (

Prevalence of Chlamydia trachomatis infection among low- and high-risk Filipino women and performance of Chlamydia rapid tests in resource-limited settings.

The prevalence of urogenital Chlamydia trachomatis infection was determined with a PCR-based test of women from low- and high-risk populations in Iloilo City, Philippines, between August 2002 and March 2006. Two rapid tests for C. trachomatis, Clearview Chlamydia MF and the Chlamydia Rapid Test (CRT), were also evaluated in these resource-limited settings. Specimens were obtained from female sex workers (FSWs; n = 1,484) attending a social hygiene clinic (SHC) and from women (n = 838) attending an obstetrics-gynecology (OB-GYN) clinic. The sensitivity, specificity, positive predictive value (P…

Serum IgG1 and IgG3 Antibodies to Chlamydia trachomatis Pgp3 and Hsp60 in Men of Subfertile Couples.

BACKGROUND: Our goal was to investigate immunoglobulin G1 (IgG1) and immunoglobulin G3 (IgG3) antibody responses to Chlamydia trachomatis proteins Pgp3 and Hsp60 in males of subfertile couples and to explore the association of these antibodies with semen parameters and male factor infertility. METHODS: Serum samples were collected from 256 male partners of subfertile couples. Serum IgG1 and IgG3 antibodies to C trachomatis Pgp3 and Hsp60 were measured using enzyme immunoassays. Semen samples were analyzed for volume, sperm concentration, and motility according to World Health Organization cri…

The T3SS structural and effector genes of Chlamydia trachomatis are expressed in distinct phenotypic cell forms.

UNLABELLED: Bacteria in the Chlamydiales order are obligate intracellular parasites of eukaryotic cells. Within this order, the genus Chlamydia contains the causative agents of a number of clinically important infections in humans. Biovars of Chlamydia trachomatis are the causative agents of trachoma and the leading cause of preventable blindness worldwide, as well as sexually transmitted infections with the potential to cause pelvic inflammatory disease and infertility. Irrespective of the resulting disease, all chlamydial species share the same obligate intracellular life cycle and developme…

Trends in Chlamydia trachomatis IgG seroprevalence in the general population of the Netherlands over 20 years.

OBJECTIVES: To report sex and age-specific Chlamydia trachomatis (Ct) seroprevalence estimates in the general population of the Netherlands between 1996 and 2017 and identify risk factors associated with Ct seropositivity. METHODS: Participants (n=5158, aged 15-59 years) were included from three independent nationwide population-based serosurveillance studies in 1996, 2007 and 2017. Participants completed a questionnaire on demographics and sexual behaviour. Serum antibodies were analysed using Medac Ct IgG ELISA test. Census weights were assigned to achieve seroprevalence estimates represent…

Expression activation of over 70% of Chlamydia trachomatis genes during the first hour of infection.

The obligate intracellular bacterium Chlamydia has a unique developmental cycle that alternates between two contrasting cell types. With a h … verns the chlamydial developmental cycle is unclear. A previous microarray study identified only 29 Chlamydia trachomatis immediate early genes, defined as genes with increased expression during the first hour postinoculation in cultured cells. In this study, we performed more sensitive RNA sequencing (RNA-Seq) analysis for C. trachomatis cultures with high multiplicit …

Уничтожение крови человека сериновыми расами синергизирует с помощью антибиотиков, чтобы ограничить воспроизведение трахомата Хламидии.

Внутриклеточный бактерий Chlamidia trachomatis эволюционировал в зависимости от человека в отношении многих метаболитов, включая большинство аминокислот и три из четырех нуклеотидов. С учетом этого не удивительно, что истощение одной аминокислоты в средних блоках хламидиального репликации в принимающих клетках. Парадоксально, что сверхнормальные уровни некоторых аминокислот также блокируют продуктивное воспроизведение хламидии. Здесь мы определили, как повышенный уровень серин, вызванный экзогенными добавками, препятствует развитию хламидиальной интеграции и уменьшает образование инфекционных

Совпадение в аннотации оригинала
The obligate intracellular bacterium, Chlamydia trachomatis, has evolved to depend on its human host for many metabolites, including most amino acids and three of the four nucleotides. Given this, it is not surprising that depletion of a single amino acid in the host cell growth medium blocks chlamydial replication. Paradoxically, supra-normal levels of some…

Sequence, structure prediction, and epitope analysis of the polymorphic membrane protein family in Chlamydia trachomatis.

The polymorphic membrane proteins (Pmps) are a family of autotransporters that play an important role in infection, adhesion and immunity in Chlamydia trachomatis. Here we show that the characteristic GGA(I,L,V) and FxxN tetrapeptide repeats fit into a larger repeat sequence, which correspond to the coils of a large beta-helical domain in high quality structure predictions. Analysis of the protein using structure prediction algorithms provided novel insight to the chlamydial Pmp family of proteins. While the tetrapeptide motifs themselves are predicted to play a structural role in folding and …

Peritonitis After Endometrial Cytology in a Woman With Hydrosalpinx Caused by Chronic Chlamydia trachomatis Infection.

Some women infected with Chlamydia trachomatis (CT) are asymptomatic, while others experience lower abdominal discomfort when the inflammatory process extends to the fallopian tubes. Without treatment, salpingitis can progress to pelvic peritonitis and subsequently, peritonitis in the upper abdomen, a condition known as Fitz-Hugh-Curtis syndrome, in some cases. A nucleic acid amplification assay is required for diagnosing CT infection. However, this assay may yield a negative result even in the presence of CT infection. This report presents a case of a 45-year-old woman with a history of hydro…

Seroreversion to Chlamydia trachomatis Pgp3 Antigen Among Children in a Hyperendemic Region of Amhara, Ethiopia.

Monitoring trachoma transmission with antibody data requires characterization of decay in IgG to Chlamydia trachomatis antigens. In a 3-year longitudinal cohort in a high-transmission setting, we estimated a median IgG half-life of 3 years and a seroreversion rate of 2.5 per 100 person-years (95% confidence interval, 1.6-3.5). Clinical Trials Registration NCT02754583.

Structure-Based Design and Synthesis of Covalent Inhibitors for Deubiquitinase and Acetyltransferase ChlaDUB1 of Chlamydia trachomatis.

Upon infection by an intracellular pathogen, host cells activate apoptotic pathways to limit pathogen replication. Consequently, efficient proliferation of the obligate intracellular pathogen Chlamydia trachomatis, a major cause of trachoma and sexually transmitted diseases, depends on the suppression of host cell apoptosis. C. trachomatis secretes deubiquitinase ChlaDUB1 into the host cell, leading among other interactions to the stabilization of antiapoptotic proteins and, thus, suppression of host cell apoptosis. Targeting the bacterial effector protein may, therefore, lead to new therapeut…

Treatment Rates for Chlamydia trachomatis and Neisseria gonorrhoeae in a Metropolitan Area: Observational Cohort Analysis.

BACKGROUND: Chlamydia trachomatis (CT) and Neisseria gonorrhoeae (GC) are the 2 most common sexually transmitted infections (STIs) in the United States. The Centers for Disease Control and Prevention regularly publishes and updates STI Treatment Guidelines. The purpose of this study was to measure and compare treatment rates for CT and GC among public and private providers. METHODS: Data from multiple sources, including electronic health records and Medicaid claims, were linked and integrated. Cases observed during 2016-2020 were defined based on positive laboratory results. We calculated des…