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Chlamydia trachomatis

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https://www.readbyqxmd.com/read/29145645/waddlia-chondrophila-a-chlamydia-related-bacterium-has-a-negative-impact-on-human-spermatozoa
#1
D Baud, N Vulliemoz, A Ammerdorffer, J Gyger, G Greub, V Castella, M Stojanov
STUDY QUESTION: What is the impact of Waddlia chondrophila, an emerging Chlamydia-related bacterium associated with miscarriage, on human spermatozoa? SUMMARY ANSWER: W. chondrophila had a negative impact on human spermatozoa (decrease in viability and mitochondrial membrane potential) and was not entirely removed from infected samples by density gradient centrifugation. WHAT IS KNOWN ALREADY: Bacterial infection or colonization might have a deleterious effect on male fertility...
November 14, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29141720/prevalence-of-chlamydia-trachomatis-specific-antibodies-before-and-after-mass-drug-administration-for-trachoma-in-community-wide-surveys-of-four-communities-in-nepal
#2
Sarah E Gwyn, Lingwei Xiang, Ram Prasad Kandel, Deborah Dean, Manoj Gambhir, Diana L Martin
The target end date for the global elimination of trachoma as a public health problem is 2020. As countries begin the process for submitting their dossier for the validation of elimination of trachoma as a public health problem, strategies for post-validation surveillance must be considered. Seroprevalence of antibodies against antigens from the causative bacteria Chlamydia trachomatis (Ct) in young children has been shown to reflect trachomatous inflammation-follicular (TF) rates in both endemic and previously endemic settings...
November 6, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29141635/repeat-testing-for-chlamydia-trachomatis-a-safe-approach-to-unsafe-sex-a-qualitative-exploration-among-youth-in-stockholm
#3
Anna Nielsen, Ayesha De Costa, Kristina Gemzell Danielsson, Mariano Salazar
BACKGROUND: Chlamydia trachomatis testing is offered to youth in Sweden, through a network of Youth Health Clinics, free at the point of care, in an attempt to bring down the prevalence and incidence of the infection. Nevertheless, infections rates have continued to rise during the past two decades and re-testing rates among youth for Chlamydia trachomatis has been reported to be high in Stockholm County. A few literature reports suggest that testing for sexually transmitted infections and the test result itself can have an undesirable impact on the sexual behaviour for the individual, i...
November 15, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/29138981/young-men-who-have-sex-with-men-at-high-risk-for-hiv-bangkok-msm-cohort-study-thailand-2006-2014
#4
Warunee Thienkrua, Frits van Griensven, Philip A Mock, Eileen F Dunne, Boonyos Raengsakulrach, Wipas Wimonsate, Nopporn Howteerakul, Chaiwat Ungsedhapand, Anupong Chiwarakorn, Timothy H Holtz
High HIV incidence has been reported in young men who have sex with men (YMSM) in North America and Western Europe, but there are limited data from Southeast Asia suggesting MSM may be the driver of the HIV epidemic in this region. We described HIV incidence and risk factors among 494 YMSM enrolled in a cohort study in Bangkok, Thailand. The HIV incidence was 7.4 per 100 person-years. In multivariable analysis, reporting use of an erectile dysfunction drug in combination with club drugs, having receptive or both insertive and receptive anal intercourse with men, having hepatitis A infection, having rectal Chlamydia trachomatis, having hepatitis B infection prior to HIV seroconversion, and reporting not always using condoms with male steady partners were significantly associated with HIV incidence in YMSM...
November 14, 2017: AIDS and Behavior
https://www.readbyqxmd.com/read/29136127/risk-of-pelvic-inflammatory-disease-in-relation-to-chlamydia-and-gonorrhea-testing-repeat-testing-and-positivity-a-population-based-cohort-study
#5
Joanne Reekie, Basil Donovan, Rebecca Guy, Jane S Hocking, John M Kaldor, Donna B Mak, Sallie Pearson, David Preen, Louise Stewart, James Ward, Bette Liu
Background: There is uncertainty around whether the risks of pelvic inflammatory disease (PID) differ following Chlamydia trachomatis (chlamydia) and Neisseria gonorrhoeae (gonorrhea) infection. We quantified the risk of PID associated with chlamydia and gonorrhea infection and subsequent repeat infections in a whole-population cohort. Methods: A cohort of 315123 Western Australian women, born during 1974-1995, was probabilistically linked to chlamydia and gonorrhea testing records and to hospitalizations and emergency department presentations for PID from 2002 to 2013...
November 9, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29132924/impact-of-capsaicin-an-active-component-of-chili-pepper-on-pathogenic-chlamydial-growth-chlamydia-trachomatis-and-chlamydia-pneumoniae-in-immortal-human-epithelial-hela-cells
#6
Kazuya Yamakawa, Junji Matsuo, Torahiko Okubo, Shinji Nakamura, Hiroyuki Yamaguchi
Chlamydia trachomatis is the leading cause of sexually transmitted infections worldwide. Capsaicin, a component of chili pepper, which can stimulate actin remodeling via capsaicin receptor TRPV1 (transient receptor potential vanilloid 1) and anti-inflammatory effects via PPARγ (peroxisome proliferator-activated receptor-γ) and LXRα (liver X receptor α), is a potential candidate to control chlamydial growth in host cells. We examined whether capsaicin could inhibit C. trachomatis growth in immortal human epithelial HeLa cells...
November 10, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/29132441/early-screening-for-chlamydia-trachomatis-in-young-women-for-primary-prevention-of-pelvic-inflammatory-disease-i-predict-study-protocol-for-a-randomised-controlled-trial
#7
Jeanne Tamarelle, Anne C M Thiébaut, Bénédicte Sabin, Cécile Bébéar, Philippe Judlin, Arnaud Fauconnier, Delphine Rahib, Layidé Méaude-Roufai, Jacques Ravel, Servaas A Morré, Bertille de Barbeyrac, Elisabeth Delarocque-Astagneau
BACKGROUND: Genital infection with Chlamydia trachomatis (Ct) is the most common bacterial sexually transmitted infection, especially among young women. Mostly asymptomatic, it can lead, if untreated, to pelvic inflammatory disease (PID), tubal factor infertility and ectopic pregnancy. Recent data suggest that Ct infections are not controlled in France and in Europe. The effectiveness of a systematic strategy for Ct screening in under-25 women remains controversial. The main objective of the i-Predict trial (Prevention of Diseases Induced by Chlamydia trachomatis) is to determine whether early screening and treatment of 18- to-24-year-old women for genital Ct infection reduces the incidence of PID over 24 months...
November 13, 2017: Trials
https://www.readbyqxmd.com/read/29128125/-diagnostic-issues-of-lymphogranuloma-venereum-a-case-series-of-5%C3%A2-patients
#8
A Fabre-Baudouin, A L Roux, C Marin, M Lachatre, M De Laroche, M Ponsoye, T Hanslik, S Trad
INTRODUCTION: Lymphogranuloma venereum (LG) is a sexually transmitted infection (STI) caused by Chlamydia trachomatis L serovar. METHODS: These five consecutive cases aim to highlight the risk of LG misdiagnosis, in case of initial presentation with isolated inguinal adenitis. RESULTS: Five men (mean age: 30±7 years) were seen in an internal medicine department, for inguinal adenopathy. One patient had clinical signs of urethritis. None presented an associated rectitis...
November 8, 2017: La Revue de Médecine Interne
https://www.readbyqxmd.com/read/29126379/an-audit-of-a-novel-electronic-messaging-treatment-service-for-chlamydia-trachomatis-at-a-community-pharmacy
#9
Sarah J Willetts, Sarah Cowper, Sharon T Cameron
In 2016, NHS Lothian regional sexual and reproductive health services introduced an electronic pharmacy treatment voucher that could be sent to the mobile phones of patients with Chlamydia trachomatis and their sexual contacts. A retrospective audit of the electronic treatment voucher database was conducted for vouchers issued between April and December 2016. Five hundred and forty-nine vouchers were issued and 56% were redeemed at a pharmacy within one week of issue. This suggests that electronic vouchers are a popular and effective means of providing expedited treatment for uncomplicated C...
January 1, 2017: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/29125849/effect-of-water-sanitation-and-hygiene-interventions-on-active-trachoma-in-north-and-south-wollo-zones-of-amhara-region-ethiopia-a-quasi-experimental-study
#10
Beselam Tadesse, Alemayehu Worku, Abera Kumie, Solomon Abebe Yimer
BACKGROUND: Trachoma is chronic kerato conjunctivitis, which is caused by repeated infection with Chlamydia trachomatis bacterium. It is hyper endemic in many rural areas of Ethiopia. The objective of this study was to measure the effect of water, sanitation and hygiene interventions on active trachoma in selected woredas of North and South Wollo zones of Amhara Region, Ethiopia. METHODOLOGY: A community based quasi-experimental study was conducted from October 2014 to December 2015 among children aged 1-8 years at baseline and among one year older same children after intervention...
November 10, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29124247/chlamydia-trachomatis-versus-common-uropathogens-as-a-cause-of-chronic-bacterial-prostatitis-is-there-any-difference-results-of-a-prospective-parallel-cohort-study
#11
Tommaso Cai, Francesca Pisano, Gabriella Nesi, Vittorio Magri, Paolo Verze, Gianpaolo Perletti, Paolo Gontero, Vincenzo Mirone, Riccardo Bartoletti
Purpose: The role of Chlamydia trachomatis (CT) infection in chronic bacterial prostatitis (CBP) is well known. What is unclear is whether there are any differences in the course or clinical outcome of the disease when the cause is CT or other uropathogens. Materials and Methods: A series of 311 patients affected by CBP due to CT (cohort A) was compared with a group of 524 patients affected by CBP caused by common uropathogen bacteria (cohort B). All participants completed the following questionnaires: National Institutes of Health Chronic Prostatitis Symptom Index, International Prostate Symptom Score, International Index of Erectile Function-15 erectile function domain (IIEF-15-EFD), Premature Ejaculation Diagnostic Tool (PEDT), and the Short Form 36 (SF-36) Health Survey...
November 2017: Investigative and Clinical Urology
https://www.readbyqxmd.com/read/29123027/dynamic-energy-dependency-of-chlamydia-trachomatis-on-host-cell-metabolism-during-different-stages-of-intracellular-growth-possible-role-of-sodium-based-energetics-in-chlamydial-atp-generation
#12
Pingdong Liang, Mónica Rosas-Lemus, Dhwani Patel, Xuan Fang, Karina Tuz, Oscar Juárez
Chlamydia trachomatis is an obligate intracellular human pathogen responsible for the most prevalent sexually-transmitted infection in the world. For decades C. trachomatis has been considered an "energy parasite" that relies entirely on the uptake of ATP from the host cell. The genomic data suggest that C. trachomatis respiratory chain could produce a sodium gradient that may sustain the energetic demands required for its rapid multiplication. However, this mechanism awaits experimental confirmation. Moreover, the relationship of Chlamydiae with the host cell, in particular its energy dependency, is not well understood...
November 9, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29122514/chlamydia-trachomatis-and-its-interaction-with-the-cellular-retromer
#13
REVIEW
Sebastian Banhart, Laura Rose, Lukas Aeberhard, Sophia Koch-Edelmann, Dagmar Heuer
Chlamydia trachomatis is an important human pathogen. This obligate intracellular bacterium grows inside the eukaryotic cell in a membrane-bound compartment, the inclusion. Recent global approaches describe the interactions of C. trachomatis with its host cell and indicate the inclusion is an intracellular trafficking hub embedded into the cellular vesicular trafficking pathways recruiting subunits of the retromer protein complex of the host cell. Here we review these recent developments in deciphering Chlamydia-host cell interactions with emphasis on the role of the retromer complex...
October 26, 2017: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/29118442/serology-reflects-a-decline-in-the-prevalence-of-trachoma-in-two-regions-of-the-gambia
#14
Stephanie J Migchelsen, Nuno Sepúlveda, Diana L Martin, Gretchen Cooley, Sarah Gwyn, Harry Pickering, Hassan Joof, Pateh Makalo, Robin Bailey, Sarah E Burr, David C W Mabey, Anthony W Solomon, Chrissy H Roberts
Trachoma is caused by Chlamydia trachomatis (Ct). It is targeted for global elimination as a public health problem. In 2014, a population-based cross-sectional study was performed in two previously trachoma-endemic areas of The Gambia. Participants of all ages from Lower River Region (LRR) (N = 1028) and Upper River Region (URR) (N = 840) underwent examination for trachoma and had blood collected for detection of antibodies against the Ct antigen Pgp3, by ELISA. Overall, 30 (1.6%) individuals had active trachoma; the prevalence in children aged 1-9 years was 3...
November 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29117636/chlamydia-trachomatis-regulates-growth-and-development-in-response-to-host-cell-fatty-acid-availability-in-the-absence-of-lipid-droplets
#15
Manu Sharma, Maria A Recuero-Checa, Francis Yue Fan, Deborah Dean
Chlamydia trachomatis (Ct) is a Gram-negative obligate intracellular pathogen of humans that causes significant morbidity from sexually transmitted and ocular diseases globally. Ct acquires host fatty acids (FA) to meet the metabolic and growth requirements of the organism. Lipid droplets (LDs) are storehouses of FAs in host cells and have been proposed to be a source of FAs for the parasitophorous vacuole, termed inclusion, in which Ct replicates. Previously, cells devoid of LDs were shown to produce reduced infectious progeny at 24 hours post-infection (hpi)...
November 8, 2017: Cellular Microbiology
https://www.readbyqxmd.com/read/29110319/effects-of-chlamydia-trachomatis-infection-on-sperm-chromatin-condensation-and-dna-integrity
#16
L Dehghan Marvast, A R Talebi, J Ghasemzadeh, A Hosseini, A A Pacey
The present study was performed to investigate the relation of Chlamydia trachomatis infection to sperm chromatin/DNA integrity in a population of infertile men (male partner of infertile couples) from Iran. Blood, semen and first-void urine samples were obtained from 250 infertile men. Data were analysed with regard to the results of (i) serological analysis for specific antibodies to C. trachomatis in serum; (ii) the presence of C. trachomatis and DNA in first-void urine; and (iii) in the semen sample of the male partner, in addition to sperm analysis, four different tests (aniline blue, chromomycin A3, acridine orange and TUNEL) were used to detect sperm chromatin and DNA abnormalities...
November 6, 2017: Andrologia
https://www.readbyqxmd.com/read/29097418/prevalence-and-treatment-outcomes-of-routine-chlamydia-trachomatis-neisseria-gonorrhoeae-and-trichomonas-vaginalis-testing-during-antenatal-care-gaborone-botswana
#17
Adriane Wynn, Doreen Ramogola-Masire, Ponatshego Gaolebale, Neo Moshashane, Ontiretse Sickboy, Sofia Duque, Elizabeth Williams, Klara Doherty, Jeffrey D Klausner, Chelsea Morroni
OBJECTIVES: Chlamydia trachomatis (CT), Neisseria gonorrhoeae (NG) and Trichomonas vaginalis (TV) are curable, mostly asymptomatic, STIs that cause adverse maternal and perinatal outcomes. Most countries do not test for those infections during antenatal care. We implemented a CT, NG and TV testing and treatment programme in an antenatal clinic in Gaborone, Botswana. METHODS: We conducted a prospective study in the antenatal clinic at Princess Marina Hospital in Gaborone, Botswana...
November 2, 2017: Sexually Transmitted Infections
https://www.readbyqxmd.com/read/29097007/national-institute-of-allergy-and-infectious-diseases-workshop-report-chlamydia-vaccines-the-way-forward
#18
Guangming Zhong, Robert C Brunham, Luis M de la Maza, Toni Darville, Carolyn Deal
Chlamydia trachomatis (Ct), an intracellular pathogen, is the most common bacterial sexually transmitted infection. In addition to acute cervicitis and urethritis, Ct can lead to serious sequelae of significant public health burden including pelvic inflammatory disease (PID) and infertility. Ct control efforts have not resulted in desired outcomes such as reduced incidence and reinfection, and this highlights the need for the development of an effective Ct vaccine. To this end, NIAID organized a workshop to consider the current status of Ct vaccine research and address critical questions in Ct vaccine design and clinical testing...
October 30, 2017: Vaccine
https://www.readbyqxmd.com/read/29080882/-single-domain-adapted-antibodies-against-chlamydia-trachomatis-preserving-the-development-of-chlamidic-infection-in-vitro
#19
S V Tillib, E Y Morgunova, T I Ivanova, E A Koroleva, M V Rutovskaya, N A Zigangirova
The technology for the generating of single-domain recombinant monoclonal antibodies (nanoantibodies) based on the immunization of a camel, cloning of induced sequences encoding single-domain antigen-recognizing fragments of non-canonical camel antibodies, as well as functional selection of clones of nanoantibodies by the phage display method, was used to obtain new effective tools for more efficient diagnostics of Chlamydia infection and to develop new approaches for effective therapy. Two promising nanoantibodies were obtained...
October 2017: Biomedit︠s︡inskai︠a︡ Khimii︠a︡
https://www.readbyqxmd.com/read/29077843/chlamydia-trachomatis-antimicrobial-susceptibility-in-colorectal-and-endocervical-cells
#20
Claudio Foschi, Melissa Salvo, Roberto Cevenini, Antonella Marangoni
Background: Rectal Chlamydia trachomatis infections represent one of the most common sexually transmitted infections in the MSM population. Although current treatment guidelines suggest the use of either azithromycin or doxycycline, several clinical studies reported on azithromycin treatment failures in the case of rectal C. trachomatis localizations. In this context, the biological reasons behind the lack of azithromycin efficacy for C. trachomatis infections at the rectal level are still poorly understood...
October 25, 2017: Journal of Antimicrobial Chemotherapy
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