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Chlamydia trachomatis

M Formánek, D Jančatová, P Komínek, P Matoušek, K Zeleník
OBJECTIVE: The human papillomavirus causes recurrent respiratory papillomatosis. Although human papillomavirus prevalence is high, the incidence of papillomatosis is low. Thus, factors other than human papillomavirus infection probably contribute to recurrent respiratory papillomatosis. This study investigated whether patients with papillomatosis are more often infected with herpes simplex virus type 2 and chlamydia trachomatis and whether laryngopharyngeal reflux occurs in this group of patients more often...
October 19, 2016: Clinical Otolaryngology
Qing-Zhen Xie, Wang-Ming Xu, Qian-Rong Qi, Zeng-Li Luo, Lan Dong
Genital tract infections with ureaplasma urealyticum (UU) and chlamydia trachomatis (CT) are the most frequent sexually-transmitted disease worldwide. UU and CT infections are considered to be the leading cause for infertility and adverse pregnancy outcomes. However, little is known about the specific effect of cervical UU and CT infections on the etiology of female infertility, as well as the pregnancy outcomes of the patients undergoing in vitro fertilization/intracytoplasmic sperm injection-embryo transfer (IVF/ICSI-ET)...
October 2016: Journal of Huazhong University of Science and Technology. Medical Sciences
Anar Gojayev, Diana P English, Matthew Macer, Masoud Azodi
Background. Pelvic inflammatory disease (PID) rarely results in diffuse ascites. Severe adhesive disease secondary to PID may lead to the formation of inclusion cysts and even pelvic peritoneal nodularity due to postinflammatory scarring and cause an elevation of serum CA-125 levels. The constellation of these findings may mimic an ovarian neoplasm. Case. We report a case of a 22-year-old female who presented with multiple pelvic cysts and diffuse ascites due to Chlamydia trachomatis infection. The initial gynecologic exam did not reveal obvious evidence of PID; however, a positive Chlamydia trachomatis test, pathologic findings, and the exclusion of other etiologies facilitated the diagnosis...
2016: Case Reports in Obstetrics and Gynecology
Josefina López-de-Munain, Maria Del Mar Cámara-Pérez, Manuel Imaz-Pérez, Javier Pereda-Berroeta, Iñigo López-Azcarreta, Josefa Muñoz-Sánchez, Ramón Cisterna-Cáncer, Oscar Luis Ferrero-Beneitez, Sofia Ibarra-Ugarte, Zuriñe Zubero-Sulibarria, Josu Mirena Baraia-Etxaburu Artetxe
BACKGROUND: Chlamydia trachomatis (C. trachomatis) is the most frequently reported sexually transmitted infection (STI) in developed countries, but there is a lack data on its incidence and population dynamics in Spain. The objectives of this study were to estimate the incidence of C. trachomatis in patients seeking medical attention in an STI clinic with a defined population catchment area, to identify factors associated with this infection, and to explore differences between factors associated with new infections and re-infections...
October 13, 2016: Enfermedades Infecciosas y Microbiología Clínica
Meghan Zuck, Tisha Ellis, Anthony Venida, Kevin Hybiske
The precise strategies that intracellular pathogens use to exit host cells have a direct impact on their ability to disseminate within a host, transmit to new hosts, and engage or avoid immune responses. The obligate intracellular bacterium Chlamydia trachomatis exits the host cell by two distinct exit strategies, lysis and extrusion. The defining characteristics of extrusions, and advantages gained by Chlamydia within this unique double-membrane structure are not well understood. Here, we define extrusions as being largely devoid of host organelles, comprised mostly of Chlamydia elementary bodies, and containing phosphatidylserine on the outer surface of the extrusion membrane...
October 14, 2016: Cellular Microbiology
S F Lax
Endometritis is nowadays rare in developed countries and typically shows a subclinical or mild course; therefore, there are probably more cases of endometritis than diagnosed but they lack clinical relevance. In the fertile period of life it can be the reason for vaginal bleeding and infertility. The most common causes for non-specific endometritis are residual placental tissue after abortion or childbirth, intrauterine interventions, lesions within the uterine cavity, such as endometrial polyps, endometrial hyperplasia and neoplasms, intrauterine devices (IUD) and cervical stenosis...
October 13, 2016: Der Pathologe
Ali N Russell, Xiaojing Zheng, Catherine M O'Connell, Harold C Wiesenfeld, Sharon L Hillier, Brandie D Taylor, Michelle Picard, Jessica Flechtner, Wujuan Zhong, Lauren C Frazer, Toni Darville
BACKGROUND:  Natural infection induces partial immunity to Chlamydia trachomatis Identification of chlamydial antigens that induce interferon-γ secretion by T cells of immune women could advance vaccine development. METHODS:  Interferon-γ production by CD4 and CD8 peripheral blood T cells from 58 high-risk women was measured after co-culture with antigen presenting cells preincubated with recombinant Escherichia coli expressing a panel of 275 chlamydial antigens...
October 12, 2016: Journal of Infectious Diseases
Xue Li, Shaoya Zhang, Qingfeng Liang, Mei Wang, Ailian Hu, Xiuyuan Li, Benshan Yang, Mingxin Zhang, Ningli Wang, Xinxin Lu
No abstract text is available yet for this article.
October 12, 2016: Science China. Life Sciences
Carolien M Wind, Maarten F Schim van der Loeff, Magnus Unemo, Rob Schuurman, Alje P van Dam, Henry J C de Vries
BACKGROUND: Performing a test of cure (TOC) could demonstrate success or failure of antimicrobial treatment of Chlamydia trachomatis infection, but recommendations for the timing of a TOC using nucleic acid amplification tests (NAATs) are inconsistent. We assessed time to clearance of C. trachomatis after treatment, using modern RNA- and DNA-based NAATs. METHODS: We analysed data from patients with a C. trachomatis and Neisseria gonorrhoeae coinfection who visited the STI Clinic Amsterdam, The Netherlands, from March through October 2014...
October 11, 2016: BMC Infectious Diseases
Guangming Zhong
Most Chlamydia species carry a 7.5kb plasmid encoding eight open reading frames conventionally called plasmid glycoproteins 1-8 or pGP1-8. Although the plasmid is not critical for chlamydial growth in vitro, its role in chlamydial pathogenesis is clearly demonstrated in the genital tracts of mice infected with Chlamydia muridarum, a model for investigating the human pathogen Chlamydia trachomatis. Plasmid-free C. trachomatis is also attenuated in both the mouse genital tract and nonhuman primate ocular tissue...
October 3, 2016: Trends in Microbiology
Charlotte E Key, Derek J Fisher
Dissecting the contribution of genes to virulence in fulfillment of Molecular Koch's postulates is essential for developing prevention and treatment strategies for bacterial pathogens. This chapter will discuss the application of a targeted, intron-based insertional mutagenesis method for creating mutants in the obligate, intracellular bacterial pathogen Chlamydia trachomatis. The methods employed for intron targeting, mutant selection, and mutant verification will be outlined including available selection markers, gene targeting strategies, and potential pitfalls...
2017: Methods in Molecular Biology
R Somayaji, C Naugler, M Guo, D Church
Bacterial sexually transmitted infections including Chlamydia trachomatis and Neisseria gonorrhoeae remain an important public health concern. We aimed to assess the population-based incidence of C. trachomatis and N. gonorrhoeae in an age-standardized cohort over time. A retrospective study of a large Canadian health region was undertaken between 2010 and 2015 using linked census and digital laboratory data. C. trachomatis and N. gonorrhoeae tests were linked to patient data. Sex and age-standardized incidence rates (IR) and ratios (IRR) were calculated for cases and testing rates...
October 5, 2016: International Journal of STD & AIDS
Charifa Zemouri, Teodora Elvira Wi, James Kiarie, Armando Seuc, Vittal Mogasale, Ahmed Latif, Nathalie Broutet
BACKGROUND: This review aimed to synthesize and analyze the diagnostic accuracy and the likelihood of providing correct treatment of the syndromic approach Vaginal Discharge Flowchart in managing cervical infections caused by Neisseria gonorrhoeae (NG) and Chlamydia trachomatis (CT), and vaginal infections caused by Trichomonas vaginalis (TV) and Bacterial vaginosis (BV) and Candida albicans. This review will inform updating the WHO 2003 guidelines on Vaginal Discharge syndromic case management...
2016: PloS One
Mariya Angelova, Emil Kovachev, Veselina Tsankova, Iliana Koleva, Silvia Mangarova
AIM: The aim of this study was to assess the prevalence of chlamydial infection among pregnant women and to determine the role of this infection in the fetus. MATERIAL AND METHODS: In the first phase of this study were reported 58 pregnant women with a positive test for active chlamydial infection by applying immunofluorescence. In the second phase of the study were reported pregnant with premature burst membranes (PBM), postnatal complications associated with chlamydial infection as puerperal endometritis, and newborns are monitored for low birth weight and growth retardation at birth...
September 15, 2016: Open Access Macedonian Journal of Medical Sciences
Tanja Kustec, Darja Keše, Irena Klavs
INTRODUCTION: To consider whether a revision of the national chlamydia surveillance system is needed, the objectives were to estimate the proportion of laboratory confirmed cases at the Institute of Microbiology and Immunology (IMI) not reported to the National Institute of Public Health (NIPH), and to assess the completeness of reporting for individual data items. METHODS: The dataset with information about the cases diagnosed at the IMI during 2007-2010, and the national chlamydia surveillance data at the NIPH, were linked using SOUNDEX code and the date of birth as unique identifier...
September 1, 2016: Zdravstveno Varstvo
Georgina F van den Berg, Charles Picavet, Rianne Hoopman, Patricia A Lohr, Eline L M Op de Coul
BACKGROUND: Women having a termination of pregnancy (TOP) have higher rates of Chlamydia trachomatis (CT) than the general population. In this study, we explored CT treatment and prevention in Dutch TOP clinics in comparison to that provided in Great Britain (GB). METHODS: A qualitative study including 14 semi-structured interviews with health care professionals (HCPs) in TOP clinics (the Netherlands: 9, GB: 5). Interviews were recorded, transcribed, and analysed by thematic content analysis...
October 5, 2016: European Journal of Contraception & Reproductive Health Care
Shardulendra Sherchand, Joyce A Ibana, Alison J Quayle, Ashok Aiyar
Chlamydia trachomatis is an obligate intracellular bacterial pathogen that cannot synthesize several amino acids, including tryptophan. Rather, C. trachomatis acquires these essential metabolites from its human host cell. Chlamydial dependence on host-provided tryptophan underlies a major host defense mechanism against the bacterium; namely, the induction of the host tryptophan-catabolizing enzyme, indoleamine 2,3- dioxygenase (IDO1) by interferon gamma (IFNγ), which leads to eradication of C. trachomatis by tryptophan starvation...
August 2016: Journal of Bacteriology & Parasitology
Robert M R Butcher, Oliver Sokana, Kelvin Jack, Colin K Macleod, Michael Marks, Eric Kalae, Leslie Sui, Charles Russell, Helena J Tutill, Rachel J Williams, Judith Breuer, Rebecca Willis, Richard T Le Mesurier, David C W Mabey, Anthony W Solomon, Chrissy H Roberts
[This corrects the article DOI: 10.1371/journal.pntd.0004863.].
October 2016: PLoS Neglected Tropical Diseases
D Joseph Davey, M Alexandra, J D Klausner
No abstract text is available yet for this article.
October 2016: International Journal of STD & AIDS
Ilada Choopara, Narong Arunrut, Wansika Kiatpathomchai, Deborah Dean, Naraporn Somboonna
We developed an assay comprising crude DNA lysis by simple heat treatment coupled loop-mediated isothermal amplification with hydroxynaphthol blue (LAMP-HNB) for C. trachomatis detection, and evaluated the developed assay for its feasibility as one-step point-of-care detection on 284 endocervical swab specimens from clinically symptomatic C. trachomatis and healthy subjects. This assay is sensitive to 0.04 pg of ompA, specific with 6 primers targeting C. trachomatis ompA region, rapid (45 min total assay time), inexpensive (~3 USD/reaction), does not require sophisticated instrumentation, and has comparable assay effectiveness (95% specificity, 90-100% sensitivity) to the bacterial DNA isolation by commercial kit coupled with PCR and gel electrophoresis (98-100% specificity, 87-100% sensitivity) based on the clinical samples test...
September 30, 2016: Letters in Applied Microbiology
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