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Trachoma prevalence

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https://www.readbyqxmd.com/read/27893297/population-based-trachoma-mapping-in-six-evaluation-units-of-papua-new-guinea
#1
Robert Ko, Colin Macleod, David Pahau, Oliver Sokana, Drew Keys, Anthea Burnett, Rebecca Willis, Geoffrey Wabulembo, Jambi Garap, Anthony W Solomon
PURPOSE: We sought to determine the prevalence of trachomatous inflammation - follicular (TF) in children aged 1-9 years, and trachomatous trichiasis (TT) in those aged ≥15 years, in suspected trachoma-endemic areas of Papua New Guinea (PNG). METHODS: We carried out six population-based prevalence surveys using the protocol developed as part of the Global Trachoma Mapping Project. RESULTS: A total of 19,013 individuals were sampled for inclusion, with 15,641 (82...
November 28, 2016: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/27865692/elimination-of-blinding-trachoma-in-china
#2
T Liu, Q Liang, A Hu, G Feng, N Wang, X Peng, C Baudouin, A Labbé
OBJECTIVE: To present the change in the prevalence of blindness caused by trachoma between 1987 and 2006 by secondary data analysis based on two China National Sample Surveys on Disability (CNSSD). METHODS: Secondary data analysis was performed on two China National Sample Surveys on Disability (CNSSD), which were national representative household surveys conducted in 1987 and 2006. The prevalence of blindness caused by trachoma was estimated by 10-year age group...
November 16, 2016: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/27846369/prevalence-of-trachoma-in-bauchi-state-nigeria-results-of-20-local-government-area-level-surveys
#3
Caleb Mpyet, Nasiru Muhammad, Mohammed Dantani Adamu, Habila Muazu, Murtala Muhammad Umar, Mohammed Abdull, Joel Alada, Musa Goyol, Uwaezuoke Onyebuchi, Francisca Olamiju, Sunday Isiyaku, Adamani William, Benjamin C Nwobi, Rebecca Willis, Rebecca Mann Flueckiger, Alex Pavluck, Brian K Chu, Nicholas Olobio, Anthony W Solomon
PURPOSE: To determine the prevalence of trachomatous inflammation - follicular (TF) and trichiasis in each of the 20 local government areas (LGAs) of Bauchi State, Nigeria. METHODS: We undertook a population-based prevalence survey in each LGA in Bauchi State, employing the Global Trachoma Mapping Project methodology. We used a 2-stage, systematic and quasi-random sampling strategy. Using probability proportional to size, we selected 25 clusters, in each of which 25 households were selected by random walk...
November 15, 2016: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/27846362/national-trachoma-assessment-in-the-lao-people-s-democratic-republic-in-2013-2014
#4
Khamphoua Southisombath, Siphet Sisalermsak, Phonesavanh Chansan, Khongsap Akkhavong, Soulasay Phommala, Susan Lewallen, Paul Courtright, Anthony W Solomon
PURPOSE: Population-based prevalence surveys were undertaken to determine whether trachoma is a public health problem in Laos requiring implementation of the SAFE strategy (surgery, antibiotics, facial cleanliness, environmental improvement). METHODS: The country was divided into 19 evaluation units (EUs), each containing a population of roughly 100,000-350,000 people. Of these, 16 were believed most likely to harbor trachoma (based on historical evidence), and were mapped using the Global Trachoma Mapping Project methods...
November 15, 2016: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/27830198/trachoma-past-present-and-future
#5
REVIEW
Mehrdad Mohammadpour, Mojtaba Abrishami, Ahmad Masoumi, Hassan Hashemi
PURPOSE: To review the background, epidemiology and current management of trachoma in endemic areas and worldwide. METHODS: Review of literature. RESULTS: Trachoma is one of the leading causes of preventable blindness in developing countries. It was reported as one of the seven most neglected tropical diseases that can be prevented via drug administration. Its infliction is primarily aimed at those living in areas deprived of clean water and proper sanitation...
December 2016: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/27824506/prevalence-of-trachoma-in-schoolchildren-in-brazil
#6
Expedito José de Albuquerque Luna, Maria de Fátima Costa Lopes, Norma Helen Medina, Joana Favacho, Maria Regina Alves Cardoso
PURPOSE: Trachoma was hyperendemic in Brazil until the 20th century. The prevalence has declined sharply in the past decades. The aim of this study was to estimate trachoma prevalence in schoolchildren in Brazilian municipalities with a Human Development Index (HDI) below the national mean. METHODS: A cluster random sampling survey on trachoma prevalence was carried out. Brazilian municipalities with HDI below the national mean, within each of the 27 states, were stratified into three strata according to population size...
November 8, 2016: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/27820670/surveillance-and-azithromycin-treatment-for-newcomers-and-travelers-evaluation-asante-trial-design-and-baseline-characteristics
#7
Ann-Margret Ervin, Harran Mkocha, Beatriz Munoz, Kurt Dreger, Laura Dize, Charlotte Gaydos, Thomas C Quinn, Sheila K West
PURPOSE: Immigrants and travelers may be sources of re-emergent infection in trachoma-endemic communities close to trachoma elimination. The primary objective of the A Surveillance and Azithromycin Treatment for Newcomers and Travelers Evaluation (ASANTE) trial was to determine whether a newcomer and traveler surveillance and treatment program in addition to annual mass drug administration (MDA) would reduce Chlamydia trachomatis infection when compared to MDA alone. METHODS: ASANTE was a randomized controlled trial in 52 communities in Kongwa, Tanzania...
December 2016: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/27820657/prevalence-of-and-risk-factors-for-trachoma-in-oromia-regional-state-of-ethiopia-results-of-79-population-based-prevalence-surveys-conducted-with-the-global-trachoma-mapping-project
#8
Berhanu Bero, Colin Macleod, Wondu Alemayehu, Solomon Gadisa, Ahmed Abajobir, Yilikal Adamu, Menbere Alemu, Liknaw Adamu, Michael Dejene, Addis Mekasha, Zelalem Habtamu Jemal, Damtew Yadeta, Oumer Shafi, Genet Kiflu, Rebecca Willis, Rebecca M Flueckiger, Brian K Chu, Alexandre L Pavluck, Anthony W Solomon
PURPOSE: To complete the baseline trachoma map in Oromia, Ethiopia, by determining prevalences of trichiasis and trachomatous inflammation - follicular (TF) at evaluation unit (EU) level, covering all districts (woredas) without current prevalence data or active control programs, and to identify factors associated with disease. METHODS: Using standardized methodologies and training developed for the Global Trachoma Mapping Project, we conducted cross-sectional community-based surveys from December 2012 to July 2014...
November 7, 2016: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/27783678/the-relationship-between-active-trachoma-and-ocular-chlamydia-trachomatis-infection-before-and-after-mass-antibiotic-treatment
#9
Athumani M Ramadhani, Tamsyn Derrick, David Macleod, Martin J Holland, Matthew J Burton
BACKGROUND: Trachoma is a blinding disease, initiated in early childhood by repeated conjunctival infection with the obligate intracellular bacterium Chlamydia trachomatis. The population prevalence of the clinical signs of active trachoma; ''follicular conjunctivitis" (TF) and/or ''intense papillary inflammation" (TI), guide programmatic decisions regarding the initiation and cessation of mass drug administration (MDA). However, the persistence of TF following resolution of infection at both the individual and population level raises concerns over the suitability of this clinical sign as a marker for C...
October 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27775463/prevalence-of-trachoma-in-katsina-state-nigeria-results-of-34-district-level-surveys
#10
Caleb Mpyet, Nasiru Muhammad, Mohammed Dantani Adamu, Habila Muazu, Murtala Mohammad Umar, Musa Goyol, Uwazoeke Onyebuchi, Ima Chima, Haliru Idris, Adamani William, Sunday Isiyaku, Benjamin Nwobi, Rebecca Mann Flueckiger, Rebecca Willis, Alexandre Pavluck, Brian K Chu, Nicholas Olobio, Anthony W Solomon
PURPOSE: To determine the local government area (LGA)-level prevalence of trachoma in all 34 LGAs of Katsina State. METHODS: A population-based prevalence survey was conducted in each LGA of Katsina State, using the Global Trachoma Mapping Project methodology. We used a 3-stage cluster random sampling strategy to select 25 households from each of 25 clusters. We examined all residents of selected households aged 1 year and older for the clinical signs of trachomatous inflammation-follicular (TF), trachomatous inflammation-intense and trichiasis, using the World Health Organization (WHO) simplified grading scheme...
October 24, 2016: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/27775455/progress-of-trachoma-mapping-in-mainland-tanzania-results-of-baseline-surveys-from-2012-to-2014
#11
Upendo J Mwingira, George Kabona, Mathias Kamugisha, Edward Kirumbi, Bernard Kilembe, Alistidia Simon, Andreas Nshala, Deogratias Damas, Alphonsina Nanai, Mwelecele Malecela, Maria Chikawe, Christina Mbise, Harran Mkocha, Patrick Massae, Humphrey R Mkali, Lisa Rotondo, Kathryn Crowley, Rebecca Willis, Anthony W Solomon, Jeremiah M Ngondi
PURPOSE: Following surveys in 2004-2006 in 50 high-risk districts of mainland Tanzania, trachoma was still suspected to be widespread elsewhere. We report on baseline surveys undertaken from 2012 to 2014. METHODS: A total of 31 districts were surveyed. In 2012 and 2013, 12 at-risk districts were selected based on proximity to known trachoma endemic districts, while in 2014, trachoma rapid assessments were undertaken, and 19 of 55 districts prioritized for baseline surveys...
October 24, 2016: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/27775454/baseline-trachoma-surveys-in-kaskazini-a-and-micheweni-districts-of-zanzibar-results-of-two-population-based-prevalence-surveys-conducted-with-the-global-trachoma-mapping-project
#12
Fatma J Omar, George Kabona, Khalfan M Abdalla, Saleh J Mohamed, Said M Ali, Shaali M Ame, Abel Ngwalle, Christina Mbise, Lisa Rotondo, Rebecca Willis, Rebecca M Flueckiger, Patrick A Massae, Ana Bakhtiari, Anthony W Solomon, Jeremiah M Ngondi
PURPOSE: Based on health care records and trachoma rapid assessments, trachoma was suspected to be endemic in Kaskazini A and Micheweni districts of Zanzibar. This study aimed to investigate the prevalence of trachomatous inflammation-follicular (TF), and trachomatous trichiasis (TT) in each of those districts. METHODS: The survey was undertaken in Kaskazini A and Micheweni districts on Unguja and Pemba Islands, respectively. A multi-stage cluster random sampling design was applied, whereby 25 census enumeration areas (clusters) and 30 households per cluster were included...
October 24, 2016: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/27756453/mathematical-modelling-of-trachoma-transmission-control-and-elimination
#13
A Pinsent, I M Blake, M G Basáñez, M Gambhir
The World Health Organization has targeted the elimination of blinding trachoma by the year 2020. To this end, the Global Elimination of Blinding Trachoma (GET, 2020) alliance relies on a four-pronged approach, known as the SAFE strategy (S for trichiasis surgery; A for antibiotic treatment; F for facial cleanliness and E for environmental improvement). Well-constructed and parameterized mathematical models provide useful tools that can be used in policy making and forecasting in order to help to control trachoma and understand the feasibility of this large-scale elimination effort...
2016: Advances in Parasitology
https://www.readbyqxmd.com/read/27726472/assessment-of-trachoma-in-cambodia-trachoma-is-not-a-public-health-problem
#14
Ngy Meng, Do Seiha, Pok Thorn, Rebecca Willis, Rebecca M Flueckiger, Michael Dejene, Susan Lewallen, Paul Courtright, Anthony W Solomon
PURPOSE: To determine whether trachoma is a public health problem requiring intervention in Cambodia. METHODS: Based on historical evidence and reports, 14 evaluation units (EUs) in Cambodia, judged to be most likely to harbor trachoma, were selected. The Global Trachoma Mapping Project methodology was used to carry out rigorous surveys to determine the prevalence of trachomatous inflammation-follicular (TF) and trichiasis in each EU. RESULTS: The EU-level prevalence of TF among 25,801 1-9-year-old children examined ranged from 0% to 0...
October 11, 2016: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/27726469/completion-of-baseline-trachoma-mapping-in-malawi-results-of-eight-population-based-prevalence-surveys-conducted-with-the-global-trachoma-mapping-project
#15
Khumbo Kalua, Alvin Chisambi, David Chinyanya, Zachariah Kamwendo, Michael Masika, Rebecca Willis, Rebecca M Flueckiger, Alexandre L Pavluck, Anthony W Solomon
PURPOSE: Following a first phase of trachoma mapping in Malawi with the Global Trachoma Mapping Project, we identified and mapped trachoma districts previously suspected to be non-endemic, although adjacent to districts with estimated trachoma prevalences indicating a public health problem. METHODS: We conducted population-based surveys in eight evaluation units (EUs) comprising eight districts in Malawi (total population 3,230,272). A 2-stage cluster random sampling design allowed us to select 30 households from each of 30 clusters per EU; all residents aged 1 year and older in selected households were examined for evidence of trachomatous inflammation-follicular (TF) and trachomatous trichiasis (TT)...
October 11, 2016: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/27726463/perspectives-of-national-coordinators-and-partners-on-the-work-of-the-global-trachoma-mapping-project
#16
Anne E Heggen, Anthony W Solomon, Paul Courtright
PURPOSE: Neglected tropical diseases (NTDs) affect people living in the poorest regions of the world and their debilitating effects perpetuate the poverty cycle. Understanding the distribution of NTDs is crucial for effective intervention delivery. In 2012, the Global Trachoma Mapping Project (GTMP) was initiated to map >1800 suspected trachoma endemic districts by March 2015. This research was carried out to better understand the implementation experience and identify lessons which might inform the GTMP and similar initiatives...
October 11, 2016: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/27726459/trachoma-mapping-in-gombe-state-nigeria-results-of-11-local-government-area-surveys
#17
Caleb Mpyet, Nasiru Muhammad, Mohammed Dantani Adamu, Habila Muazu, Murtala Muhammad Umar, Joel Alada, Uwazoeke Onyebuchi, Fracisca Olamiju, Sunday Isiyaku, Adamani William, Rebecca Willis, Rebecca Mann Flueckiger, Alexandre Pavluck, Brian K Chu, Danjuma Mohammed, Nicholas Olobio, Anthony W Solomon
PURPOSE: To determine the need or otherwise for establishment of a trachoma elimination program in Gombe State, Nigeria, by estimating the population-based prevalence of trachoma in each Local Government Area (LGA) of Gombe. METHODS: Using a multi-stage, systematic, random, and quasi-random sampling approach and Global Trachoma Mapping Project support, we selected 25 clusters in each LGA. In each cluster, we selected 25 households and all consenting residents aged 1 year and older were examined for trachomatous inflammation-follicular (TF) and trichiasis, using the World Health Organization simplified grading scheme...
October 11, 2016: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/27695076/correction-low-prevalence-of-conjunctival-infection-with-chlamydia-trachomatis-in-a-treatment-na%C3%A3-ve-trachoma-endemic-region-of-the-solomon-islands
#18
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
https://www.readbyqxmd.com/read/27643498/cross-sectional-surveys-of-the-prevalence-of-follicular-trachoma-and-trichiasis-in-the-gambia-has-elimination-been-reached
#19
Sarah E Burr, Ansumana Sillah, Anselme S Sanou, Anita C Wadagni, John Hart, Emma M Harding-Esch, Sarjo Kanyi, Robin L Bailey
BACKGROUND: The Gambia's National Eye Health Programme has made a concerted effort to reduce the prevalence of trachoma. The present study had two objectives. The first was to conduct surveillance following mass drug administrations to determine whether The Gambia has reached the World Health Organization's (WHO) criteria for trachoma elimination, namely a prevalence of trachomatous inflammation-follicular (TF) of less than 5% in children aged 1 to 9 years. The second was to determine the prevalence of trichiasis (TT) cases unknown to the programme and evaluate whether these meet the WHO criteria of less than 0...
September 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27628039/sequelae-from-epidemic-viral-conjunctivitis-can-be-associated-with-inflammatory-trachoma-in-schoolchildren
#20
Roberta Lilian Fernandes de Sousa Meneghim, Magda Massae Hata Viveiros, Alicia Galindo-Ferreiro, Carlos Roberto Padovani, Silvana Artioli Schellini
PURPOSE: To evaluate the sequelae due to epidemic viral conjunctivitis (VC) for a possible association with inflammatory trachoma in schoolchildren. METHODS: A cross-sectional survey was performed of 2,093 schoolchildren in public schools in Sao Paulo State, Brazil. The exams were conducted according to the WHO definitions to detect trachoma. We evaluated the prevalence and the association between inflammatory trachoma and sequelae due to VC. RESULTS: The prevalence of inflammatory trachoma in schoolchildren in Botucatu City was 2...
September 14, 2016: Seminars in Ophthalmology
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