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https://www.readbyqxmd.com/read/28487054/reduced-cost-chlamydia-trachomatis-specific-multiplex-real-time-pcr-diagnostic-assay-evaluated-for-ocular-swabs-and-use-by-trachoma-research-programmes
#1
Robert Butcher, Jo Houghton, Tamsyn Derrick, Athumani Ramadhani, Beatriz Herrera, Anna R Last, Patrick A Massae, Matthew J Burton, Martin J Holland, Chrissy H Roberts
INTRODUCTION: Trachoma, caused by the intracellular bacterium Chlamydia trachomatis (Ct) is the leading infectious cause of preventable blindness. Many commercial platforms are available that provide highly sensitive and specific detection of Ct DNA. However, the majority of these commercial platforms are inaccessible for population-level surveys in resource-limited settings typical to trachoma control programmes. We developed two low-cost quantitative PCR (qPCR) tests for Ct using readily available reagents on standard real-time thermocyclers...
May 6, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28479620/active-trachoma-and-community-use-of-sanitation-ethiopia
#2
William E Oswald, Aisha Ep Stewart, Michael R Kramer, Tekola Endeshaw, Mulat Zerihun, Berhanu Melak, Eshetu Sata, Demelash Gessese, Tesfaye Teferi, Zerihun Tadesse, Birhan Guadie, Jonathan D King, Paul M Emerson, Elizabeth K Callahan, Dana Flanders, Christine L Moe, Thomas F Clasen
OBJECTIVE: To investigate, in Amhara, Ethiopia, the association between prevalence of active trachoma among children aged 1-9 years and community sanitation usage. METHODS: Between 2011 and 2014, prevalence of trachoma and household pit latrine usage were measured in five population-based cross-sectional surveys. Data on observed indicators of latrine use were aggregated into a measure of community sanitation usage calculated as the proportion of households with a latrine in use...
April 1, 2017: Bulletin of the World Health Organization
https://www.readbyqxmd.com/read/28472466/spatial-clustering-of-high-load-ocular-chlamydia-trachomatis-infection-in-trachoma-a-cross-sectional-population-based-study
#3
Anna Last, Sarah Burr, Neal Alexander, Emma Harding-Esch, Chrissy H Roberts, Meno Nabicassa, Eunice Teixeira da Silva Cassama, David Mabey, Martin Holland, Robin Bailey
Chlamydia trachomatis (Ct) is the commonest cause of bacterial sexually transmitted infection and infectious cause of blindness (trachoma) worldwide. Understanding the spatial distribution of Ct infection may enable us to identify populations at risk and improve our understanding of Ct transmission. In this study we sought to investigate the spatial distribution of Ct infection and the clinical features associated with high Ct load in trachoma-endemic communities on the Bijagós Archipelago (Guinea Bissau)...
May 3, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28441120/prevalence-of-trachoma-in-northern-benin-results-from-11-population-based-prevalence-surveys-covering-26-districts
#4
Amadou Alfa Bio, Pelagie M Boko, Yannelle A Dossou, Jean-Jacques Tougoue, Achille Kabore, Ignace Sounouvou, Jean-Eudes Biaou, Lionel Nizigama, Paul Courtright, Anthony W Solomon, Lisa Rotondo, Wilfrid Batcho, Dorothée Kinde-Gazard
AIMS: We sought to evaluate trachoma prevalence in all suspected-endemic areas of Benin. METHODS: We conducted population-based surveys covering 26 districts grouped into 11 evaluation units (EUs), using a two-stage, systematic and random, cluster sampling design powered at EU level. In each EU, 23 villages were systematically selected with population proportional to size; 30 households were selected from each village using compact segment sampling. In selected households, we examined all consenting residents aged one year or above for trichiasis, trachomatous inflammation - follicular (TF), and trachomatous inflammation - intense...
April 25, 2017: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/28438414/predictors-of-trachomatous-trichiasis-surgery-outcome
#5
Esmael Habtamu, Tariku Wondie, Sintayehu Aweke, Zerihun Tadesse, Mulat Zerihun, Bizuayehu Gashaw, Guadie S Wondimagegn, Hiwot D Mengistie, Saul N Rajak, Kelly Callahan, Helen A Weiss, Matthew J Burton
PURPOSE: Unfavorable outcomes after trachomatous trichiasis (TT) surgery are undermining the global trachoma elimination effort. This analysis investigates predictors of postoperative TT (PTT), eyelid contour abnormalities (ECAs), and granuloma in the 2 most common TT surgery procedures: posterior lamellar tarsal rotation (PLTR) and bilamellar tarsal rotation (BLTR). DESIGN: Secondary data analysis from a randomized, controlled, single-masked clinical trial. PARTICIPANTS: A total of 1000 patients with TT, with lashes touching the eye or evidence of epilation, in association with tarsal conjunctival scarring...
April 21, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28426814/progress-and-projections-in-the-program-to-eliminate-trachoma
#6
Paul M Emerson, Pamela J Hooper, Virginia Sarah
No abstract text is available yet for this article.
April 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28396349/biochemical-and-genetic-analysis-of-the-chlamydia-groel-chaperonins
#7
Melissa Illingworth, Anna J Hooppaw, Lu Ruan, Derek J Fisher, Lingling Chen
Chaperonins are essential for cellular growth under normal and stressful conditions and consequently represent one of the most conserved and ancient protein classes. The paradigm Escherichia coli chaperonin, EcGroEL, and its cochaperonin, EcGroES, assist folding of proteins via an ATP-dependent mechanism. In addition to the presence of groEL and groES homologs, groEL paralogs are found in many bacteria, including pathogens, and have evolved poorly understood species-specific functions. Chlamydia spp., which are obligate intracellular bacteria, have reduced genomes that nonetheless encode three groEL genes, ChgroEL, ChgroEL2 and ChgroEL3 We hypothesized that ChGroEL is the bona-fide chaperonin, while the paralogs perform novel, Chlamydia-specific functions...
April 10, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28379764/school-hygiene-as-a-tool-of-modernization-european-culture-and-jewish-colonies-in-galilee-1882-1939
#8
Yair Seltenreich
During the efforts to modernize the farmers of Jewish colonies in Galilee, both teachers and doctors came to view hygiene less as an agent of health and cleanliness and more as a symbol of physical and mental regeneration. Schools thus emerged as a natural arena for hygieno-pedagogic activities. Doctors' attempts to eradicate malaria or trachoma by associating the concept of hygiene with modern sanitation and outdoor activities were soon followed by pedagogical efforts to endow hygiene with moral values.
2017: Canadian Bulletin of Medical History, Bulletin Canadien D'histoire de la Médecine
https://www.readbyqxmd.com/read/28368993/penetrating-keratoplasty-at-a-tertiary-referral-center-in-ethiopia-indications-and-outcomes
#9
Menen Ayalew, Yonas Tilahun, Doug Holsclaw, Maanasa Indaram, Nicole E Stoller, Jeremy D Keenan, Jennifer Rose-Nussbaumer
PURPOSE: To describe the indications, visual acuity outcomes, and graft survival after penetrating keratoplasty (PKP) in Addis Ababa, Ethiopia. METHODS: The medical records of patients who underwent PKP at Menelik II Hospital between September 2000 and September 2013 were retrospectively reviewed. The prespecified outcomes were graft survival, visual acuity, and complication rates. RESULTS: A total of 321 patients underwent PKP during the study period and were included in the analysis...
June 2017: Cornea
https://www.readbyqxmd.com/read/28357377/chlamydia-trachomatis-genital-infections
#10
REVIEW
Catherine M O'Connell, Morgan E Ferone
Etiology, transmission and protection: Chlamydia trachomatis is the leading cause of bacterial sexually transmitted infection (STI) globally. However, C. trachomatis also causes trachoma in endemic areas, mostly Africa and the Middle East, and is a leading cause of preventable blindness worldwide. Epidemiology, incidence and prevalence: The World Health Organization estimates 131 million new cases of C. trachomatis genital infection occur annually. Globally, infection is most prevalent in young women and men (14-25 years), likely driven by asymptomatic infection, inadequate partner treatment and delayed development of protective immunity...
September 5, 2016: Microbial Cell
https://www.readbyqxmd.com/read/28352612/a-co-infection-model-system-and-the-use-of-chimeric-proteins-to-study-chlamydia-inclusion-proteins-interaction
#11
Ying Han, Isabelle Derré
Chlamydia trachomatis is an obligate intracellular bacterium associated with trachoma and sexually transmitted diseases. During its intracellular developmental cycle, Chlamydia resides in a membrane bound compartment called the inclusion. A subset of Type III secreted effectors, the inclusion membrane proteins (Inc), are inserted into the inclusion membrane. Inc proteins are strategically positioned to promote inclusion interaction with host factors and organelles, a process required for bacterial replication, but little is known about Inc proteins function or host interacting partners...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28351345/short-term-increase-in-prevalence-of-nasopharyngeal-carriage-of-macrolide-resistant-staphylococcus-aureus-following-mass-drug-administration-with-azithromycin-for-trachoma-control
#12
Ebrima Bojang, James Jafali, Vincent Perreten, John Hart, Emma M Harding-Esch, Ansumana Sillah, David C W Mabey, Martin J Holland, Robin L Bailey, Anna Roca, Sarah E Burr
BACKGROUND: Mass drug administration (MDA) with azithromycin is a corner-stone of trachoma control however it may drive the emergence of antimicrobial resistance. In a cluster-randomized trial (Clinical trial gov NCT00792922), we compared the reduction in the prevalence of active trachoma in communities that received three annual rounds of MDA to that in communities that received a single treatment round. We used the framework of this trial to carry out an opportunistic study to investigate if the increased rounds of treatment resulted in increased prevalence of nasopharyngeal carriage of macrolide-resistant Staphylococcus aureus...
March 28, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28345563/chlamydial-eye-infections-current-perspectives
#13
Gita Satpathy, Himanshu Sekhar Behera, Nishat Hussain Ahmed
Chlamydia trachomatis, an obligate intraocular bacteria causing trachoma, adult and neonatal inclusion conjunctivitis, was the leading cause of blindness in the last century worldwide. Improvement in socioeconomic and living conditions, availability of antibiotics, and introduction of National Trachoma Control Programmes reduced the prevalence in developed countries, but it persisted in resource-poor settings of Africa and Asia, including India. In 2016, as per the WHO report, trachoma is restricted to 42 countries, causing blindness/visual impairment in ~1...
February 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28341010/history-and-development-of-ophthalmology-in-taiwan
#14
REVIEW
Yu-Chih Hou, Gale A Oren, Muh-Shy Chen, Fung-Rong Hu
Western medicine was first introduced to Taiwan by medical missionaries in the mid-19(th) century. Modernization of medicine was systematically transplanted to Taiwan in the Japanese colonial period, and ophthalmology was established third among hospital departments, following internal medicine and surgery. Dr Hidetaka Yamaguchi, an ophthalmologist, was the first head of the Taihoku Hospital, later known as National Taiwan University Hospital (NTUH; Taipei, Taiwan). Ophthalmologists during the colonial period conducted studies on tropical and infectious eye diseases...
December 2016: Journal of the Formosan Medical Association, Taiwan Yi Zhi
https://www.readbyqxmd.com/read/28288672/profiling-and-validation-of-individual-and-patterns-of-chlamydia-trachomatis-specific-antibody-responses-in-trachomatous-trichiasis
#15
Harry Pickering, Sarah E Burr, Tamsyn Derrick, Pateh Makalo, Hassan Joof, Richard D Hayward, Martin J Holland
BACKGROUND: Ocular Chlamydia trachomatis (Ct) infection causes trachoma, the leading infectious cause of blindness. A Ct D/UW3 proteome microarray and sera from Gambian adults with trachomatous trichiasis (TT) or healthy matched controls previously identified several novel antigens, which suggested differential recognition in adults with TT. METHODS: We re-analysed this serological microarray data using more robust microarray analysis techniques accounting for typical problems associated with highly dimensional data...
March 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28279456/probabilistic-forecasts-of-trachoma-transmission-at-the-district-level-a-statistical-model-comparison
#16
Amy Pinsent, Fengchen Liu, Michael Deiner, Paul Emerson, Ana Bhaktiari, Travis C Porco, Thomas Lietman, Manoj Gambhir
The World Health Organization and its partners are aiming to eliminate trachoma as a public health problem by 2020. In this study, we compare forecasts of TF prevalence in 2011 for 7 different statistical and mechanistic models across 9 de-identified trachoma endemic districts, representing 4 unique trachoma endemic countries. We forecast TF prevalence between 1-6 years ahead in time and compare the 7 different models to the observed 2011 data using a log-likelihood score. An SIS model, including a district-specific random effect for the district-specific transmission coefficient, had the highest log-likelihood score across all 9 districts and was therefore the best performing model...
March 2017: Epidemics
https://www.readbyqxmd.com/read/28276755/prevalence-of-trachoma-in-kano-state-nigeria-results-of-44-local-government-area-level-surveys
#17
Caleb Mpyet, Nasiru Muhammad, Mohammed Dantani Adamu, Habila Muazu, Murtala Muhammad Umar, Musa Goyol, Hadi Bala Yahaya, Uwazoeke Onyebuchi, Chris Ogoshi, Tijjani Hussaini, Sunday Isiyaku, Adamani William, Rebecca M Flueckiger, Brian K Chu, Rebecca Willis, Alexandre L Pavluck, Nicholas Olobio, Sophie Phelan, Colin Macleod, Anthony W Solomon
PURPOSE: We sought to determine the prevalence of trachoma in 44 Local Government Areas (LGAs) of Kano State, Nigeria. METHODS: A population-based prevalence survey was conducted in each Kano LGA. We used a two-stage systematic and quasi-random sampling strategy to select 25 households from each of 25 clusters in each LGA. All consenting household residents aged 1 year and above were examined for trachomatous inflammation-follicular (TF), trachomatous inflammation-intense (TI) and trichiasis...
June 2017: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/28228394/update-on-chlamydia-trachomatis-vaccinology
#18
REVIEW
Luis M de la Maza, Guangming Zhong, Robert C Brunham
Attempts to produce a vaccine to protect against Chlamydia trachomatis-induced trachoma were initiated more than 100 years ago and continued for several decades. Using whole organisms, protective responses were obtained. However, upon exposure to C. trachomatis, disease exacerbation developed in some immunized individuals, precluding the implementation of the vaccine. Evidence of the role of C. trachomatis as a sexually transmitted pathogen started to emerge in the 1960s, and it soon became evident that it can cause acute infections and long-term sequelae in women, men, and newborns...
April 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28214223/evaluation-of-a-field-test-for-antibodies-against-chlamydia-trachomatis-during-trachoma-surveillance-in-nepal
#19
Michelle J Sun, Andrea I Zambrano, Laura Dize, Beatriz Munoz, Sarah Gwyn, Sailesh Mishra, Diana L Martin, Shekhar Sharma, Sheila K West
PURPOSE: Testing for antibodies to Chlamydia trachomatis has potential as a surveillance tool. Our evaluation compares lateral flow assays (LFAs) during surveillance surveys in Nepal with Multiplex bead array (MBA). Fifty children were randomly sampled from each of 15 random clusters in two districts of Nepal. Finger prick blood samples were collected from 1509 children and tested onsite for anti-Pgp3 antibodies by LFA. The LFA was read at 30min as negative, positive, or invalid. Tests results were also rated as difficult to read ("equivocal")...
May 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28187129/podoconiosis-trachomatous-trichiasis-and-cataract-in-northern-ethiopia-a-comparative-cross-sectional-study
#20
Helen Burn, Sintayehu Aweke, Tariku Wondie, Esmael Habtamu, Kebede Deribe, Saul Rajak, Stephen Bremner, Gail Davey
BACKGROUND: Rural populations in low-income countries commonly suffer from the co-morbidity of neglected tropical diseases (NTDs). Podoconiosis, trachomatous trichiasis (both NTDs) and cataract are common causes of morbidity among subsistence farmers in the highlands of northern Ethiopia. We explored whether podoconiosis was associated with cataract or trachomatous trichiasis (TT) among this population. METHODS: A comparative cross-sectional study was conducted in East Gojam region, Amhara, Ethiopia in May 2016...
February 2017: PLoS Neglected Tropical Diseases
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