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1. Initial results of coring at Prees, Cheshire Basin, UK (ICDP JET project): towards an integrated stratigraphy, timescale, and Earth system understanding for the Early Jurassic

Author

S. P. Hesselbo, A. Al-Suwaidi, S. J. Baker, G. Ballabio, C. M. Belcher, A. Bond, I. Boomer, R. Bos, C. J. Bjerrum, K. Bogus, R. Boyle, J. V. Browning, A. R. Butcher, D. J. Condon, P. Copestake, S. Daines, C. Dalby, M. Damaschke, S. E. Damborenea, J.-F. Deconinck, A. J. Dickson, I. M. Fendley, C. P. Fox, A. Fraguas, J. Frieling, T. A. Gibson, T. He, K. Hickey, L. A. Hinnov, T. P. Hollaar, C. Huang, A. J. L. Hudson, H. C. Jenkyns, E. Idiz, M. Jiang, W. Krijgsman, C. Korte, M. J. Leng, T. M. Lenton, K. Leu, C. T. S. Little, C. MacNiocaill, M. O. Manceñido, T. A. Mather, E. Mattioli, K. G. Miller, R. J. Newton, K. N. Page, J. Pálfy, G. Pieńkowski, R. J. Porter, S. W. Poulton, A. C. Riccardi, J. B. Riding, A. Roper, M. Ruhl, R. L. Silva, M. S. Storm, G. Suan, D. Szűcs, N. Thibault, A. Uchman, J. N. Stanley, C. V. Ullmann, B. van de Schootbrugge, M. L. Vickers, S. Wadas, J. H. Whiteside, P. B. Wignall, T. Wonik, W. Xu, C. Zeeden, and K. Zhao

Subjects
Geology, QE1-996.5
Abstract

Drilling for the International Continental Scientific Drilling Program (ICDP) Early Jurassic Earth System and Timescale project (JET) was undertaken between October 2020 and January 2021. The drill site is situated in a small-scale synformal basin of the latest Triassic to Early Jurassic age that formed above the major Permian–Triassic half-graben system of the Cheshire Basin. The borehole is located to recover an expanded and complete succession to complement the legacy core from the Llanbedr (Mochras Farm) borehole drilled through 1967–1969 on the edge of the Cardigan Bay Basin, North Wales. The overall aim of the project is to construct an astronomically calibrated integrated timescale for the Early Jurassic and to provide insights into the operation of the Early Jurassic Earth system. Core of Quaternary age cover and Early Jurassic mudstone was obtained from two shallow partially cored geotechnical holes (Prees 2A to 32.2 m below surface (m b.s.) and Prees 2B to 37.0 m b.s.) together with Early Jurassic and Late Triassic mudstone from the principal hole, Prees 2C, which was cored from 32.92 to 651.32 m (corrected core depth scale). Core recovery was 99.7 % for Prees 2C. The ages of the recovered stratigraphy range from the Late Triassic (probably Rhaetian) to the Early Jurassic, Early Pliensbachian (Ibex Ammonoid Chronozone). All ammonoid chronozones have been identified for the drilled Early Jurassic strata. The full lithological succession comprises the Branscombe Mudstone and Blue Anchor formations of the Mercia Mudstone Group, the Westbury and Lilstock formations of the Penarth Group, and the Redcar Mudstone Formation of the Lias Group. A distinct interval of siltstone is recognized within the Late Sinemurian of the Redcar Mudstone Formation, and the name “Prees Siltstone Member” is proposed. Depositional environments range from playa lake in the Late Triassic to distal offshore marine in the Early Jurassic. Initial datasets compiled from the core include radiography, natural gamma ray, density, magnetic susceptibility, and X-ray fluorescence (XRF). A full suite of downhole logs was also run. Intervals of organic carbon enrichment occur in the Rhaetian (Late Triassic) Westbury Formation and in the earliest Hettangian and earliest Pliensbachian strata of the Redcar Mudstone Formation, where up to 4 % total organic carbon (TOC) is recorded. Other parts of the succession are generally organic-lean, containing less than 1 % TOC. Carbon-isotope values from bulk organic matter have also been determined, initially at a resolution of ∼ 1 m, and these provide the basis for detailed correlation between the Prees 2 succession and adjacent boreholes and Global Stratotype Section and Point (GSSP) outcrops. Multiple complementary studies are currently underway and preliminary results promise an astronomically calibrated biostratigraphy, magnetostratigraphy, and chemostratigraphy for the combined Prees and Mochras successions as well as insights into the dynamics of background processes and major palaeo-environmental changes.

Published
2023
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2. Paleoecology and evolutionary response of planktonic foraminifera to the mid-Pliocene Warm Period and Plio-Pleistocene bipolar ice sheet expansion

Author

A. Woodhouse, F. A. Procter, S. L. Jackson, R. A. Jamieson, R. J. Newton, P. F. Sexton, and T. Aze

Subjects
Ecology, QH540-549.5, Life, QH501-531, Geology, QE1-996.5
Abstract

The Pliocene-Recent is associated with many important climatic and paleoceanographic changes, which have shaped the biotic and abiotic nature of the modern world. The closure of the Central American Seaway and the development and intensification of Northern Hemisphere ice sheets had profound global impacts on the latitudinal and vertical structure of the oceans, triggering the extinction and radiation of many marine groups. In particular, marine calcifying planktonic foraminifera, which are highly sensitive to water column structure, exhibited a series of extinctions as global temperatures fell. By analyzing high-resolution (∼ 5 kyr) sedimentary records from the Eastern Equatorial Pacific Ocean, complemented with global records from the novel Triton dataset, we document the biotic changes in this microfossil group, within which three species displayed isochronous co-extinction, and species with cold-water affinity increased in dominance as meridional temperature gradients steepened. We suggest that these changes were associated with the terminal stages of the closure of the Central American Seaway, where following the sustained warmth of the mid-Pliocene Warm Period, bipolar ice sheet expansion initiated a world in which cold- and deep-dwelling species became increasingly more successful. Such global-scale paleoecological and macroevolutionary variations between the Pliocene and the modern icehouse climate would suggest significant deviations from pre-industrial baselines within modern and future marine plankton communities as anthropogenic climate forcing continues.

Published
2023
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3. Adaptive ecological niche migration does not negate extinction susceptibility

Author

A. Woodhouse, S. L. Jackson, R. A. Jamieson, R. J. Newton, P. F. Sexton, and T. Aze

Subjects
Medicine, Science
Abstract

Abstract Extinction rates in the modern world are currently at their highest in 66 million years and are likely to increase with projections of future climate change. Our knowledge of modern-day extinction risk is largely limited to decadal-centennial terrestrial records, while data from the marine realm is typically applied to high-order (> 1 million year) timescales. At present, it is unclear whether fossil organisms with common ancestry and ecological niche exhibit consistent indicators of ecological stress prior to extinction. The marine microfossil record, specifically that of the planktonic foraminifera, allows for high-resolution analyses of large numbers of fossil individuals with incredibly well-established ecological and phylogenetic history. Here, analysis of the isochronous extinction of two members of the planktonic foraminiferal genus Dentoglobigerina shows disruptive selection differentially compounded by permanent ecological niche migration, “pre-extinction gigantism”, and photosymbiont bleaching prior to extinction. Despite shared ecological and phylogenetic affinity, and timing of extinction, the marked discrepancies observed within the pre-extinction phenotypic responses are species-specific. These behaviours may provide insights into the nature of evolution and extinction in the open ocean and can potentially assist in the recognition and understanding of marine extinction risk in response to global climate change.

Published
2021
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4. Latest Permian carbonate carbon isotope variability traces heterogeneous organic carbon accumulation and authigenic carbonate formation

Author

M. Schobben, S. van de Velde, J. Gliwa, L. Leda, D. Korn, U. Struck, C. V. Ullmann, V. Hairapetian, A. Ghaderi, C. Korte, R. J. Newton, S. W. Poulton, and P. B. Wignall

Subjects
Environmental pollution, TD172-193.5, Environmental protection, TD169-171.8, Environmental sciences, GE1-350
Abstract

Bulk-carbonate carbon isotope ratios are a widely applied proxy for investigating the ancient biogeochemical carbon cycle. Temporal carbon isotope trends serve as a prime stratigraphic tool, with the inherent assumption that bulk micritic carbonate rock is a faithful geochemical recorder of the isotopic composition of seawater dissolved inorganic carbon. However, bulk-carbonate rock is also prone to incorporate diagenetic signals. The aim of the present study is to disentangle primary trends from diagenetic signals in carbon isotope records which traverse the Permian–Triassic boundary in the marine carbonate-bearing sequences of Iran and South China. By pooling newly produced and published carbon isotope data, we confirm that a global first-order trend towards depleted values exists. However, a large amount of scatter is superimposed on this geochemical record. In addition, we observe a temporal trend in the amplitude of this residual δ13C variability, which is reproducible for the two studied regions. We suggest that (sub-)sea-floor microbial communities and their control on calcite nucleation and ambient porewater dissolved inorganic carbon δ13C pose a viable mechanism to induce bulk-rock δ13C variability. Numerical model calculations highlight that early diagenetic carbonate rock stabilization and linked carbon isotope alteration can be controlled by organic matter supply and subsequent microbial remineralization. A major biotic decline among Late Permian bottom-dwelling organisms facilitated a spatial increase in heterogeneous organic carbon accumulation. Combined with low marine sulfate, this resulted in varying degrees of carbon isotope overprinting. A simulated time series suggests that a 50 % increase in the spatial scatter of organic carbon relative to the average, in addition to an imposed increase in the likelihood of sampling cements formed by microbial calcite nucleation to 1 out of 10 samples, is sufficient to induce the observed signal of carbon isotope variability. These findings put constraints on the application of Permian–Triassic carbon isotope chemostratigraphy based on whole-rock samples, which appears less refined than classical biozonation dating schemes. On the other hand, this signal of increased carbon isotope variability concurrent with the largest mass extinction of the Phanerozoic may provide information about local carbon cycling mediated by spatially heterogeneous (sub-)sea-floor microbial communities under suppressed bioturbation.

Published
2017
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5. Dynamic anoxic ferruginous conditions during the end-Permian mass extinction and recovery

Author

M. O. Clarkson, R. A. Wood, S. W. Poulton, S. Richoz, R. J. Newton, S. A. Kasemann, F. Bowyer, and L. Krystyn

Subjects
Science
Abstract

Oceanic anoxia is invoked for driving the Permo-Triassic Mass Extinction, but the timing, distribution and chemical state are poorly understood. Here, the authors show that fluctuations of anoxic, non-sulfidic (ferruginous) conditions were important for the delayed biotic recovery in the Neo-Tethys.

Published
2016
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6. Genetic engineering: An additional tool for plant improvement

Author

S. Mohan Jain, Christian Oker-Blom, Eija Pehu, and R. J. Newton

Subjects
Agriculture, Agriculture (General), S1-972
Abstract

Advances in gene transfer technologies have enabled the production of both monocot and dicot transgenic plants. With the biolistic method, genes can be transferred in recalcitrant crop plants and forest trees, independent of their genotype. Inexpensive methods for both stable and transient gene transfers - ultrasonication, direct DNA insertion during imbibition using somatic embryos, and silicon carbide fibres - have been developed. The frequency of Agrobacterium-mediated transformation rates of cloned genes can be enhanced in plant cells. The analysis of molecular markers (RFLPs, RAPDs, DNA fingerprints) can accomplish the characterization, gene mapping and identification and certification and patent protection of cultivars. With PCR, selective amplification of a specific DNA segment from a small amount of an organism’s total DNA can be used toidentify transgenic cultivars. The expression of a target gene can be inhibited with antisense RNA. So far, a limited number of genes have been identified and cloned with genetic engineering. With specific gene transfers, many goals such as biological control of insect pests and fungi, male sterility, virus resistance, improving seed protein, and production of transgenic plants as “bioreactors” can be accomplished. T-DNA mutagenesis may lead to learning more about the genetic control of plant development and morphogenesis, and isolation of useful mutants. Before genetic engineering becomes a reliable tool of plant breeding, more attention is needed to explore: (a) new plant genetic resources in order toidentify and clone new genes, (b) fate of selective and scorable marker genes, and (c) field evaluation of transgenes in transgenic plants.

Published
1992

7. Cerebral palsy and developmental intellectual disability in children younger than 5 years: Findings from the GBD-WHO Rehabilitation Database 2019

Author

Bolajoko O. Olusanya, Melissa Gladstone, Scott M. Wright, Mijna Hadders-Algra, Nem-Yun Boo, M. K. C. Nair, Nihad Almasri, Vijaya Kancherla, Maureen E. Samms-Vaughan, Angelina Kakooza-Mwesige, Tracey Smythe, Christie del Castillo-Hegyi, Ricardo Halpern, Olaf K. de Camargo, Jalal Arabloo, Aziz Eftekhari, Amira Shaheen, Sheffali Gulati, Andrew N. Williams, Jacob O. Olusanya, Donald Wertlieb, Charles R. J. Newton, Adrian C. Davis, Extremities Pain and Disability (EXPAND), and (GRDDC), Global Research on Developmental Disabilities Collaborators

Subjects
cerebral palsy, global burden of disease, Public Health, Environmental and Occupational Health, global health, developmental disabilities, World Health Organization, rehabilitation, PREVALENCE, early intervention, RJ101 Child Health. Child health services, intellectual disability, RA0421 Public health. Hygiene. Preventive Medicine, Child, Preschool, Humans, Disabled Persons, Child, SDGs
Abstract

ObjectiveChildren with developmental disabilities are associated with a high risk of poor school enrollment and educational attainment without timely and appropriate support. Epidemiological data on cerebral palsy and associated comorbidities required for policy intervention in global health are lacking. This paper set out to report the best available evidence on the global and regional prevalence of cerebral palsy (CP) and developmental intellectual disability and the associated “years lived with disability” (YLDs) among children under 5 years of age in 2019.MethodsWe analyzed the collaborative 2019 Rehabilitation Database of the Global Burden of Disease (GBD) Study and World Health Organization for neurological and mental disorders available for 204 countries and territories. Point prevalence and YLDs with 95% uncertainty intervals (UI) are presented.ResultsGlobally, 8.1 million (7.1–9.2) or 1.2% of children under 5 years are estimated to have CP with 16.1 million (11.5–21.0) or 2.4% having intellectual disability. Over 98% resided in low-income and middle-income countries (LMICs). CP and intellectual disability accounted for 6.5% and 4.5% of the aggregate YLDs from all causes of adverse health outcomes respectively. African Region recorded the highest prevalence of CP (1.6%) while South-East Asia Region had the highest prevalence of intellectual disability. The top 10 countries accounted for 57.2% of the global prevalence of CP and 62.0% of the global prevalence of intellectual disability.ConclusionBased on this Database, CP and intellectual disability are highly prevalent and associated with substantial YLDs among children under 5 years worldwide. Universal early detection and support services are warranted, particularly in LMICs to optimize school readiness for these children toward inclusive education as envisioned by the United Nations' Sustainable Development Goals.

Published
2022
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9. Prospective Observational Study of Incidence and Preventable Burden of Childhood Tuberculosis, Kenya

Author

Andrew J, Brent, Christopher, Nyundo, Joyce, Langat, Caroline, Mulunda, Joshua, Wambua, Evasius, Bauni, Joyce, Sande, Kate, Park, Thomas N, Williams, Charles R J, Newton, Michael, Levin, J Anthony G, Scott, Hemed, Twahir, and Wellcome Trust

Subjects
Male, Prevalence, COASTAL KENYA, lcsh:Medicine, DISEASE, contact tracing, burden, 0302 clinical medicine, Cost of Illness, prevention, Risk Factors, 1108 Medical Microbiology, Epidemiology, Odds Ratio, CRITERIA, 030212 general & internal medicine, Prospective Observational Study of Incidence and Preventable Burden of Childhood Tuberculosis, Kenya, Child, bacteria, RESISTANT TUBERCULOSIS, Incidence (epidemiology), 1. No poverty, 3. Good health, Infectious Diseases, TB, 1117 Public Health And Health Services, tuberculosis, Child, Preschool, Population Surveillance, Chemoprophylaxis, Female, epidemiology, Life Sciences & Biomedicine, Microbiology (medical), medicine.medical_specialty, isoniazid, Tuberculosis, Adolescent, case detection rate, PULMONARY TUBERCULOSIS, 030231 tropical medicine, Immunology, DIAGNOSIS, Microbiology, lcsh:Infectious and parasitic diseases, 03 medical and health sciences, KIDS TB Study Group, children, Environmental health, SURVEILLANCE, medicine, Humans, lcsh:RC109-216, Science & Technology, business.industry, Research, lcsh:R, Infant, Newborn, chemoprophylaxis, Infant, 1103 Clinical Sciences, Odds ratio, GLOBAL BURDEN, medicine.disease, Kenya, tuberculosis and other mycobacteria, PROSPECTIVE COHORT, preventable burden, incidence, Observational study, business, Contact tracing
Abstract

Substantial progress has been made in the fight against tuberculosis (TB); however, new approaches are needed to achieve the current target set by the World Health Organization (WHO) to reduce TB incidence to 90% of 2016 levels by 2035 (1). A key element of WHO’s End TB Strategy is the prioritization of preventive treatment (2). However, the preventable burden of childhood TB has not been quantified in prospective epidemiologic studies, and globally, only an estimated 7% of eligible children received isoniazid chemoprophylaxis in 2015 (1). Diagnosis of TB is more challenging in children than in adults (3). In low-resource settings, where TB burden is highest, diagnosis often relies on poorly validated clinical algorithms (4). As a result, adequate surveillance data are lacking, and published estimates of the global childhood TB burden vary widely (1,5–11). High-quality prospective data on the TB burden and case detection rate (CDR) in children are recognized priorities (8,11,12), and population-level data showing the preventable burden of childhood TB might reinforce the public health case for chemoprophylaxis in children. We designed the Kilifi Improving Diagnosis and Surveillance of Childhood TB (KIDS TB) Study to estimate the incidence, CDR, risk factors, and preventable burden of childhood TB in Kenya.

Published
2018

10. Global, regional, and national age-sex-specific mortality for 282 causes of death in 195 countries and territories, 1980–2017: a systematic analysis for the Global Burden of Disease Study 2017

Author

Gregory A Roth, Degu Abate, Kalkidan Hassen Abate, Solomon M Abay, Cristiana Abbafati, Nooshin Abbasi, Hedayat Abbastabar, Foad Abd-Allah, Jemal Abdela, Ahmed Abdelalim, Ibrahim Abdollahpour, Rizwan Suliankatchi Abdulkader, Haftom Temesgen Abebe, Molla Abebe, Zegeye Abebe, Ayenew Negesse Abejie, Semaw F Abera, Olifan Zewdie Abil, Haftom Niguse Abraha, Aklilu Roba Abrham, Laith Jamal Abu-Raddad, Manfred Mario Kokou Accrombessi, Dilaram Acharya, Abdu A Adamu, Oladimeji M Adebayo, Rufus Adesoji Adedoyin, Victor Adekanmbi, Olatunji O Adetokunboh, Beyene Meressa Adhena, Mina G Adib, Amha Admasie, Ashkan Afshin, Gina Agarwal, Kareha M Agesa, Anurag Agrawal, Sutapa Agrawal, Alireza Ahmadi, Mehdi Ahmadi, Muktar Beshir Ahmed, Sayem Ahmed, Amani Nidhal Aichour, Ibtihel Aichour, Miloud Taki Eddine Aichour, Mohammad Esmaeil Akbari, Rufus Olusola Akinyemi, Nadia Akseer, Ziyad Al-Aly, Ayman Al-Eyadhy, Rajaa M Al-Raddadi, Fares Alahdab, Khurshid Alam, Tahiya Alam, Animut Alebel, Kefyalew Addis Alene, Mehran Alijanzadeh, Reza Alizadeh-Navaei, Syed Mohamed Aljunid, Ala'a Alkerwi, François Alla, Peter Allebeck, Jordi Alonso, Khalid Altirkawi, Nelson Alvis-Guzman, Azmeraw T Amare, Leopold N Aminde, Erfan Amini, Walid Ammar, Yaw Ampem Amoako, Nahla Hamed Anber, Catalina Liliana Andrei, Sofia Androudi, Megbaru Debalkie Animut, Mina Anjomshoa, Hossein Ansari, Mustafa Geleto Ansha, Carl Abelardo T Antonio, Palwasha Anwari, Olatunde Aremu, Johan Ärnlöv, Amit Arora, Monika Arora, Al Artaman, Krishna K Aryal, Hamid Asayesh, Ephrem Tsegay Asfaw, Zerihun Ataro, Suleman Atique, Sachin R Atre, Marcel Ausloos, Euripide F G A Avokpaho, Ashish Awasthi, Beatriz Paulina Ayala Quintanilla, Yohanes Ayele, Rakesh Ayer, Peter S Azzopardi, Arefeh Babazadeh, Umar Bacha, Hamid Badali, Alaa Badawi, Ayele Geleto Bali, Katherine E Ballesteros, Maciej Banach, Kajori Banerjee, Marlena S Bannick, Joseph Adel Mattar Banoub, Miguel A Barboza, Suzanne Lyn Barker-Collo, Till Winfried Bärnighausen, Simon Barquera, Lope H Barrero, Quique Bassat, Sanjay Basu, Bernhard T Baune, Habtamu Wondifraw Baynes, Shahrzad Bazargan-Hejazi, Neeraj Bedi, Ettore Beghi, Masoud Behzadifar, Meysam Behzadifar, Yannick Béjot, Bayu Begashaw Bekele, Abate Bekele Belachew, Ezra Belay, Yihalem Abebe Belay, Michelle L Bell, Aminu K Bello, Derrick A Bennett, Isabela M Bensenor, Adam E Berman, Eduardo Bernabe, Robert S Bernstein, Gregory J Bertolacci, Mircea Beuran, Tina Beyranvand, Ashish Bhalla, Suraj Bhattarai, Soumyadeeep Bhaumik, Zulfiqar A Bhutta, Belete Biadgo, Molly H Biehl, Ali Bijani, Boris Bikbov, Ver Bilano, Nigus Bililign, Muhammad Shahdaat Bin Sayeed, Donal Bisanzio, Tuhin Biswas, Brigette F Blacker, Berrak Bora Basara, Rohan Borschmann, Cristina Bosetti, Kayvan Bozorgmehr, Oliver J Brady, Luisa C Brant, Carol Brayne, Alexandra Brazinova, Nicholas J K Breitborde, Hermann Brenner, Paul Svitil Briant, Gabrielle Britton, Traolach Brugha, Reinhard Busse, Zahid A Butt, Charlton S K H Callender, Ismael R Campos-Nonato, Julio Cesar Campuzano Rincon, Jorge Cano, Mate Car, Rosario Cárdenas, Giulia Carreras, Juan J Carrero, Austin Carter, Félix Carvalho, Carlos A Castañeda-Orjuela, Jacqueline Castillo Rivas, Chris D Castle, Clara Castro, Franz Castro, Ferrán Catalá-López, Ester Cerin, Yazan Chaiah, Jung-Chen Chang, Fiona J Charlson, Pankaj Chaturvedi, Peggy Pei-Chia Chiang, Odgerel Chimed-Ochir, Vesper Hichilombwe Chisumpa, Abdulaal Chitheer, Rajiv Chowdhury, Hanne Christensen, Devasahayam J Christopher, Sheng-Chia Chung, Flavia M Cicuttini, Liliana G Ciobanu, Massimo Cirillo, Aaron J Cohen, Leslie Trumbull Cooper, Paolo Angelo Cortesi, Monica Cortinovis, Ewerton Cousin, Benjamin C Cowie, Michael H Criqui, Elizabeth A Cromwell, Christopher Stephen Crowe, John A Crump, Matthew Cunningham, Alemneh Kabeta Daba, Abel Fekadu Dadi, Lalit Dandona, Rakhi Dandona, Anh Kim Dang, Paul I Dargan, Ahmad Daryani, Siddharth K Das, Rajat Das Gupta, José Das Neves, Tamirat Tesfaye Dasa, Aditya Prasad Dash, Adrian C Davis, Nicole Davis Weaver, Dragos Virgil Davitoiu, Kairat Davletov, Fernando Pio De La Hoz, Jan-Walter De Neve, Meaza Girma Degefa, Louisa Degenhardt, Tizta T Degfie, Selina Deiparine, Gebre Teklemariam Demoz, Balem Betsu Demtsu, Edgar Denova-Gutiérrez, Kebede Deribe, Nikolaos Dervenis, Don C Des Jarlais, Getenet Ayalew Dessie, Subhojit Dey, Samath D Dharmaratne, Daniel Dicker, Mesfin Tadese Dinberu, Eric L Ding, M Ashworth Dirac, Shirin Djalalinia, Klara Dokova, David Teye Doku, Christl A Donnelly, E Ray Dorsey, Pratik P Doshi, Dirk Douwes-Schultz, Kerrie E Doyle, Tim R Driscoll, Manisha Dubey, Eleonora Dubljanin, Eyasu Ejeta Duken, Bruce B Duncan, Andre R Duraes, Hedyeh Ebrahimi, Soheil Ebrahimpour, Dumessa Edessa, David Edvardsson, Anne Elise Eggen, Charbel El Bcheraoui, Maysaa El Sayed Zaki, Ziad El-Khatib, Hajer Elkout, Christian Lycke Ellingsen, Matthias Endres, Aman Yesuf Endries, Benjamin Er, Holly E Erskine, Babak Eshrati, Sharareh Eskandarieh, Reza Esmaeili, Alireza Esteghamati, Mahdi Fakhar, Hamed Fakhim, Mahbobeh Faramarzi, Mohammad Fareed, Farzaneh Farhadi, Carla Sofia E sá Farinha, Andre Faro, Maryam S Farvid, Farshad Farzadfar, Mohammad Hosein Farzaei, Valery L Feigin, Andrea B Feigl, Netsanet Fentahun, Seyed-Mohammad Fereshtehnejad, Eduarda Fernandes, Joao C Fernandes, Alize J Ferrari, Garumma Tolu Feyissa, Irina Filip, Samuel Finegold, Florian Fischer, Christina Fitzmaurice, Nataliya A Foigt, Kyle J Foreman, Carla Fornari, Tahvi D Frank, Takeshi Fukumoto, John E Fuller, Nancy Fullman, Thomas Fürst, João M Furtado, Neal D Futran, Silvano Gallus, Alberto L Garcia-Basteiro, Miguel A Garcia-Gordillo, William M Gardner, Abadi Kahsu Gebre, Tsegaye Tewelde Gebrehiwot, Amanuel Tesfay Gebremedhin, Bereket Gebremichael, Teklu Gebrehiwo Gebremichael, Tilayie Feto Gelano, Johanna M Geleijnse, Ricard Genova-Maleras, Yilma Chisha Dea Geramo, Peter W Gething, Kebede Embaye Gezae, Mohammad Rasoul Ghadami, Reza Ghadimi, Khalil Ghasemi Falavarjani, Maryam Ghasemi-Kasman, Mamata Ghimire, Katherine B Gibney, Paramjit Singh Gill, Tiffany K Gill, Richard F Gillum, Ibrahim Abdelmageed Ginawi, Maurice Giroud, Giorgia Giussani, Shifalika Goenka, Ellen M Goldberg, Srinivas Goli, Hector Gómez-Dantés, Philimon N Gona, Sameer Vali Gopalani, Taren M Gorman, Atsushi Goto, Alessandra C Goulart, Elena V Gnedovskaya, Ayman Grada, Giuseppe Grosso, Harish Chander Gugnani, Andre Luiz Sena Guimaraes, Yuming Guo, Prakash C Gupta, Rahul Gupta, Rajeev Gupta, Tanush Gupta, Reyna Alma Gutiérrez, Bishal Gyawali, Juanita A Haagsma, Nima Hafezi-Nejad, Tekleberhan B Hagos, Tewodros Tesfa Hailegiyorgis, Gessessew Bugssa Hailu, Arvin Haj-Mirzaian, Arya Haj-Mirzaian, Randah R Hamadeh, Samer Hamidi, Alexis J Handal, Graeme J Hankey, Hilda L Harb, Sivadasanpillai Harikrishnan, Josep Maria Haro, Mehedi Hasan, Hadi Hassankhani, Hamid Yimam Hassen, Rasmus Havmoeller, Roderick J Hay, Simon I Hay, Yihua He, Akbar Hedayatizadeh-Omran, Mohamed I Hegazy, Behzad Heibati, Mohsen Heidari, Delia Hendrie, Andualem Henok, Nathaniel J Henry, Claudiu Herteliu, Fatemeh Heydarpour, Pouria Heydarpour, Sousan Heydarpour, Desalegn Tsegaw Hibstu, Hans W Hoek, Michael K Hole, Enayatollah Homaie Rad, Praveen Hoogar, H Dean Hosgood, Seyed Mostafa Hosseini, Mehdi Hosseinzadeh, Mihaela Hostiuc, Sorin Hostiuc, Peter J Hotez, Damian G Hoy, Thomas Hsiao, Guoqing Hu, John J Huang, Abdullatif Husseini, Mohammedaman Mama Hussen, Susan Hutfless, Bulat Idrisov, Olayinka Stephen Ilesanmi, Usman Iqbal, Seyed Sina Naghibi Irvani, Caleb Mackay Salpeter Irvine, Nazrul Islam, Sheikh Mohammed Shariful Islam, Farhad Islami, Kathryn H Jacobsen, Leila Jahangiry, Nader Jahanmehr, Sudhir Kumar Jain, Mihajlo Jakovljevic, Moti Tolera Jalu, Spencer L James, Mehdi Javanbakht, Achala Upendra Jayatilleke, Panniyammakal Jeemon, Kathy J Jenkins, Ravi Prakash Jha, Vivekanand Jha, Catherine O Johnson, Sarah C Johnson, Jost B Jonas, Ankur Joshi, Jacek Jerzy Jozwiak, Suresh Banayya Jungari, Mikk Jürisson, Zubair Kabir, Rajendra Kadel, Amaha Kahsay, Rizwan Kalani, Manoochehr Karami, Behzad Karami Matin, André Karch, Corine Karema, Hamidreza Karimi-Sari, Amir Kasaeian, Dessalegn H Kassa, Getachew Mullu Kassa, Tesfaye Dessale Kassa, Nicholas J Kassebaum, Srinivasa Vittal Katikireddi, Anil Kaul, Zhila Kazemi, Ali Kazemi Karyani, Dhruv Satish Kazi, Adane Teshome Kefale, Peter Njenga Keiyoro, Grant Rodgers Kemp, Andre Pascal Kengne, Andre Keren, Chandrasekharan Nair Kesavachandran, Yousef Saleh Khader, Behzad Khafaei, Morteza Abdullatif Khafaie, Alireza Khajavi, Nauman Khalid, Ibrahim A Khalil, Ejaz Ahmad Khan, Muhammad Shahzeb Khan, Muhammad Ali Khan, Young-Ho Khang, Mona M Khater, Abdullah T Khoja, Ardeshir Khosravi, Mohammad Hossein Khosravi, Jagdish Khubchandani, Aliasghar A Kiadaliri, Getiye D Kibret, Zelalem Teklemariam Kidanemariam, Daniel N Kiirithio, Daniel Kim, Young-Eun Kim, Yun Jin Kim, Ruth W Kimokoti, Yohannes Kinfu, Adnan Kisa, Katarzyna Kissimova-Skarbek, Mika Kivimäki, Ann Kristin Skrindo Knudsen, Jonathan M Kocarnik, Sonali Kochhar, Yoshihiro Kokubo, Tufa Kolola, Jacek A Kopec, Parvaiz A Koul, Ai Koyanagi, Michael A Kravchenko, Kewal Krishan, Barthelemy Kuate Defo, Burcu Kucuk Bicer, G Anil Kumar, Manasi Kumar, Pushpendra Kumar, Michael J Kutz, Igor Kuzin, Hmwe Hmwe Kyu, Deepesh P Lad, Sheetal D Lad, Alessandra Lafranconi, Dharmesh Kumar Lal, Ratilal Lalloo, Tea Lallukka, Jennifer O Lam, Faris Hasan Lami, Van C Lansingh, Sonia Lansky, Heidi J Larson, Arman Latifi, Kathryn Mei-Ming Lau, Jeffrey V Lazarus, Georgy Lebedev, Paul H Lee, James Leigh, Mostafa Leili, Cheru Tesema Leshargie, Shanshan Li, Yichong Li, Juan Liang, Lee-Ling Lim, Stephen S Lim, Miteku Andualem Limenih, Shai Linn, Shiwei Liu, Yang Liu, Rakesh Lodha, Chris Lonsdale, Alan D Lopez, Stefan Lorkowski, Paulo A Lotufo, Rafael Lozano, Raimundas Lunevicius, Stefan Ma, Erlyn Rachelle King Macarayan, Mark T Mackay, Jennifer H MacLachlan, Emilie R Maddison, Fabiana Madotto, Hassan Magdy Abd El Razek, Muhammed Magdy Abd El Razek, Dhaval P Maghavani, Marek Majdan, Reza Majdzadeh, Azeem Majeed, Reza Malekzadeh, Deborah Carvalho Malta, Ana-Laura Manda, Luiz Garcia Mandarano-Filho, Helena Manguerra, Mohammad Ali Mansournia, Chabila Christopher Mapoma, Dadi Marami, Joemer C Maravilla, Wagner Marcenes, Laurie Marczak, Ashley Marks, Guy B Marks, Gabriel Martinez, Francisco Rogerlândio Martins-Melo, Ira Martopullo, Winfried März, Melvin B Marzan, Joseph R Masci, Benjamin Ballard Massenburg, Manu Raj Mathur, Prashant Mathur, Richard Matzopoulos, Pallab K Maulik, Mohsen Mazidi, Colm McAlinden, John J McGrath, Martin McKee, Brian J McMahon, Suresh Mehata, Man Mohan Mehndiratta, Ravi Mehrotra, Kala M Mehta, Varshil Mehta, Tefera C Mekonnen, Addisu Melese, Mulugeta Melku, Peter T N Memiah, Ziad A Memish, Walter Mendoza, Desalegn Tadese Mengistu, Getnet Mengistu, George A Mensah, Seid Tiku Mereta, Atte Meretoja, Tuomo J Meretoja, Tomislav Mestrovic, Haftay Berhane Mezgebe, Bartosz Miazgowski, Tomasz Miazgowski, Anoushka I Millear, Ted R Miller, Molly Katherine Miller-Petrie, G K Mini, Parvaneh Mirabi, Mojde Mirarefin, Andreea Mirica, Erkin M Mirrakhimov, Awoke Temesgen Misganaw, Habtamu Mitiku, Babak Moazen, Karzan Abdulmuhsin Mohammad, Moslem Mohammadi, Noushin Mohammadifard, Mohammed A Mohammed, Shafiu Mohammed, Viswanathan Mohan, Ali H Mokdad, Mariam Molokhia, Lorenzo Monasta, Ghobad Moradi, Maziar Moradi-Lakeh, Mehdi Moradinazar, Paula Moraga, Lidia Morawska, Ilais Moreno Velásquez, Joana Morgado-Da-Costa, Shane Douglas Morrison, Marilita M Moschos, Simin Mouodi, Seyyed Meysam Mousavi, Kindie Fentahun Muchie, Ulrich Otto Mueller, Satinath Mukhopadhyay, Kate Muller, John Everett Mumford, Jonah Musa, Kamarul Imran Musa, Ghulam Mustafa, Saravanan Muthupandian, Jean B Nachega, Gabriele Nagel, Aliya Naheed, Azin Nahvijou, Gurudatta Naik, Sanjeev Nair, Farid Najafi, Luigi Naldi, Hae Sung Nam, Vinay Nangia, Jobert Richie Nansseu, Bruno Ramos Nascimento, Gopalakrishnan Natarajan, Nahid Neamati, Ionut Negoi, Ruxandra Irina Negoi, Subas Neupane, Charles R J Newton, Frida N Ngalesoni, Josephine W Ngunjiri, Anh Quynh Nguyen, Grant Nguyen, Ha Thu Nguyen, Huong Thanh Nguyen, Long Hoang Nguyen, Minh Nguyen, Trang Huyen Nguyen, Emma Nichols, Dina Nur Anggraini Ningrum, Yirga Legesse Nirayo, Molly R Nixon, Nomonde Nolutshungu, Shuhei Nomura, Ole F Norheim, Mehdi Noroozi, Bo Norrving, Jean Jacques Noubiap, Hamid Reza Nouri, Malihe Nourollahpour Shiadeh, Mohammad Reza Nowroozi, Peter S Nyasulu, Christopher M Odell, Richard Ofori-Asenso, Felix Akpojene Ogbo, In-Hwan Oh, Olanrewaju Oladimeji, Andrew T Olagunju, Pedro R Olivares, Helen Elizabeth Olsen, Bolajoko Olubukunola Olusanya, Jacob Olusegun Olusanya, Kanyin L Ong, Sok King Sk Ong, Eyal Oren, Heather M Orpana, Alberto Ortiz, Justin R Ortiz, Stanislav S Otstavnov, Simon Øverland, Mayowa Ojo Owolabi, Raziye Özdemir, Mahesh P A, Rosana Pacella, Smita Pakhale, Abhijit P Pakhare, Amir H Pakpour, Adrian Pana, Songhomitra Panda-Jonas, Jeyaraj Durai Pandian, Andrea Parisi, Eun-Kee Park, Charles D H Parry, Hadi Parsian, Shanti Patel, Sanghamitra Pati, George C Patton, Vishnupriya Rao Paturi, Katherine R Paulson, Alexandre Pereira, David M Pereira, Norberto Perico, Konrad Pesudovs, Max Petzold, Michael R Phillips, Frédéric B Piel, David M Pigott, Julian David Pillay, Meghdad Pirsaheb, Farhad Pishgar, Suzanne Polinder, Maarten J Postma, Akram Pourshams, Hossein Poustchi, Ashwini Pujar, Swayam Prakash, Narayan Prasad, Caroline A Purcell, Mostafa Qorbani, Hedley Quintana, D Alex Quistberg, Kirankumar Waman Rade, Amir Radfar, Anwar Rafay, Alireza Rafiei, Fakher Rahim, Kazem Rahimi, Afarin Rahimi-Movaghar, Mahfuzar Rahman, Mohammad Hifz Ur Rahman, Muhammad Aziz Rahman, Rajesh Kumar Rai, Sasa Rajsic, Usha Ram, Chhabi Lal Ranabhat, Prabhat Ranjan, Puja C Rao, David Laith Rawaf, Salman Rawaf, Christian Razo-García, K Srinath Reddy, Robert C Reiner, Marissa B Reitsma, Giuseppe Remuzzi, Andre M N Renzaho, Serge Resnikoff, Satar Rezaei, Shahab Rezaeian, Mohammad Sadegh Rezai, Seyed Mohammad Riahi, Antonio Luiz P Ribeiro, Maria Jesus Rios-Blancas, Kedir Teji Roba, Nicholas L S Roberts, Stephen R Robinson, Leonardo Roever, Luca Ronfani, Gholamreza Roshandel, Ali Rostami, Dietrich Rothenbacher, Ambuj Roy, Enrico Rubagotti, Perminder S Sachdev, Basema Saddik, Ehsan Sadeghi, Hosein Safari, Mahdi Safdarian, Sare Safi, Saeid Safiri, Rajesh Sagar, Amirhossein Sahebkar, Mohammad Ali Sahraian, Nasir Salam, Joseph S Salama, Payman Salamati, Raphael De Freitas Saldanha, Zikria Saleem, Yahya Salimi, Sundeep Santosh Salvi, Inbal Salz, Evanson Zondani Sambala, Abdallah M Samy, Juan Sanabria, Maria Dolores Sanchez-Niño, Damian Francesco Santomauro, Itamar S Santos, João Vasco Santos, Milena M Santric Milicevic, Bruno Piassi Sao Jose, Abdur Razzaque Sarker, Rodrigo Sarmiento-Suárez, Nizal Sarrafzadegan, Benn Sartorius, Shahabeddin Sarvi, Brijesh Sathian, Maheswar Satpathy, Arundhati R Sawant, Monika Sawhney, Sonia Saxena, Mehdi Sayyah, Elke Schaeffner, Maria Inês Schmidt, Ione J C Schneider, Ben Schöttker, Aletta Elisabeth Schutte, David C Schwebel, Falk Schwendicke, James G Scott, Mario Sekerija, Sadaf G Sepanlou, Edson Serván-Mori, Seyedmojtaba Seyedmousavi, Hosein Shabaninejad, Katya Anne Shackelford, Azadeh Shafieesabet, Mehdi Shahbazi, Amira A Shaheen, Masood Ali Shaikh, Mehran Shams-Beyranvand, Mohammadbagher Shamsi, Morteza Shamsizadeh, Kiomars Sharafi, Mehdi Sharif, Mahdi Sharif-Alhoseini, Rajesh Sharma, Jun She, Aziz Sheikh, Peilin Shi, Mekonnen Sisay Shiferaw, Mika Shigematsu, Rahman Shiri, Reza Shirkoohi, Ivy Shiue, Farhad Shokraneh, Mark G Shrime, Si Si, Soraya Siabani, Tariq J Siddiqi, Inga Dora Sigfusdottir, Rannveig Sigurvinsdottir, Donald H Silberberg, Diego Augusto Santos Silva, João Pedro Silva, Natacha Torres Da Silva, Dayane Gabriele Alves Silveira, Jasvinder A Singh, Narinder Pal Singh, Prashant Kumar Singh, Virendra Singh, Dhirendra Narain Sinha, Karen Sliwa, Mari Smith, Badr Hasan Sobaih, Soheila Sobhani, Eugène Sobngwi, Samir S Soneji, Moslem Soofi, Reed J D Sorensen, Joan B Soriano, Ireneous N Soyiri, Luciano A Sposato, Chandrashekhar T Sreeramareddy, Vinay Srinivasan, Jeffrey D Stanaway, Vladimir I Starodubov, Vasiliki Stathopoulou, Dan J Stein, Caitlyn Steiner, Leo G Stewart, Mark A Stokes, Michelle L Subart, Agus Sudaryanto, Mu'awiyyah Babale Sufiyan, Patrick John Sur, Ipsita Sutradhar, Bryan L Sykes, P N Sylaja, Dillon O Sylte, Cassandra E I Szoeke, Rafael Tabarés-Seisdedos, Takahiro Tabuchi, Santosh Kumar Tadakamadla, Ken Takahashi, Nikhil Tandon, Segen Gebremeskel Tassew, Nuno Taveira, Arash Tehrani-Banihashemi, Tigist Gashaw Tekalign, Merhawi Gebremedhin Tekle, Mohamad-Hani Temsah, Omar Temsah, Abdullah Sulieman Terkawi, Manaye Yihune Teshale, Belay Tessema, Gizachew Assefa Tessema, Kavumpurathu Raman Thankappan, Sathish Thirunavukkarasu, Nihal Thomas, Amanda G Thrift, George D Thurston, Binyam Tilahun, Quyen G To, Ruoyan Tobe-Gai, Marcello Tonelli, Roman Topor-Madry, Anna E Torre, Miguel Tortajada-Girbés, Mathilde Touvier, Marcos Roberto Tovani-Palone, Bach Xuan Tran, Khanh Bao Tran, Suryakant Tripathi, Christopher E Troeger, Thomas Clement Truelsen, Nu Thi Truong, Afewerki Gebremeskel Tsadik, Derrick Tsoi, Lorainne Tudor Car, E Murat Tuzcu, Stefanos Tyrovolas, Kingsley N Ukwaja, Irfan Ullah, Eduardo A Undurraga, Rachel L Updike, Muhammad Shariq Usman, Olalekan A Uthman, Selen Begüm Uzun, Muthiah Vaduganathan, Afsane Vaezi, Gaurang Vaidya, Pascual R Valdez, Elena Varavikova, Tommi Juhani Vasankari, Narayanaswamy Venketasubramanian, Santos Villafaina, Francesco S Violante, Sergey Konstantinovitch Vladimirov, Vasily Vlassov, Stein Emil Vollset, Theo Vos, Gregory R Wagner, Fasil Shiferaw Wagnew, Yasir Waheed, Mitchell Taylor Wallin, Judd L Walson, Yanping Wang, Yuan-Pang Wang, Molla Mesele Wassie, Elisabete Weiderpass, Robert G Weintraub, Fitsum Weldegebreal, Kidu Gidey Weldegwergs, Andrea Werdecker, Adhena Ayaliew Werkneh, T Eoin West, Ronny Westerman, Harvey A Whiteford, Justyna Widecka, Lauren B Wilner, Shadrach Wilson, Andrea Sylvia Winkler, Charles Shey Wiysonge, Charles D A Wolfe, Shouling Wu, Yun-Chun Wu, Grant M A Wyper, Denis Xavier, Gelin Xu, Simon Yadgir, Ali Yadollahpour, Seyed Hossein Yahyazadeh Jabbari, Bereket Yakob, Lijing L Yan, Yuichiro Yano, Mehdi Yaseri, Yasin Jemal Yasin, Gökalp Kadri Yentür, Alex Yeshaneh, Ebrahim M Yimer, Paul Yip, Biruck Desalegn Yirsaw, Engida Yisma, Naohiro Yonemoto, Gerald Yonga, Seok-Jun Yoon, Marcel Yotebieng, Mustafa Z Younis, Mahmoud Yousefifard, Chuanhua Yu, Vesna Zadnik, Zoubida Zaidi, Sojib Bin Zaman, Mohammad Zamani, Zohreh Zare, Ayalew Jejaw Zeleke, Zerihun Menlkalew Zenebe, Anthony Lin Zhang, Kai Zhang, Maigeng Zhou, Sanjay Zodpey, Liesl Joanna Zuhlke, Mohsen Naghavi, and Christopher J L Murray., Rubagotti, Enrico, Abay, Solomon M., Roth, Gregory, Abd Allah, Foad, Abdela, Jemal, Abbastabar, Hedayat, and Abbasi, Nooshin

Subjects
Overview, Disease, Territory, Causes of death, humanities
Abstract

Global development goals increasingly rely on country-specific estimates for benchmarking a nation's progress. To meet this need, the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2016 estimated global, regional, national, and, for selected locations, subnational cause-specific mortality beginning in the year 1980. Here we report an update to that study, making use of newly available data and improved methods. GBD 2017 provides a comprehensive assessment of cause-specific mortality for 282 causes in 195 countries and territories from 1980 to 2017. The Lancet Publishing Group

Published
2019

12. Prevalence and factors associated with convulsive status epilepticus in Africans with epilepsy

Author

Symon M, Kariuki, Angelina, Kakooza-Mwesige, Ryan G, Wagner, Eddie, Chengo, Steven, White, Gathoni, Kamuyu, Anthony K, Ngugi, Josemir W, Sander, Brian G R, Neville, Charles R J, Newton, and John, Noh

Subjects
Male, Pediatrics, Neurology, Neurologi, Antibodies, Protozoan, HIV Infections, HIV Antibodies, Logistic regression, Epilepsy, South Africa, 0302 clinical medicine, Status Epilepticus, Risk Factors, Epidemiology, Prevalence, Medicine, Uganda, 030212 general & internal medicine, Young adult, Malaria, Falciparum, Child, education.field_of_study, Brain Diseases, Surveillance, monitoring & evaluation, 3. Good health, Hospitalization, Marital status, Educational Status, Anticonvulsants, Female, medicine.symptom, Burns, Adult, medicine.medical_specialty, Adolescent, Population, Status epilepticus, Article, Medication Adherence, 03 medical and health sciences, Young Adult, parasitic diseases, Humans, education, Marital Status, business.industry, medicine.disease, Kenya, Logistic Models, Unemployment, Neurology (clinical), business, 030217 neurology & neurosurgery
Abstract

Objective: We conducted a community survey to estimate the prevalence and describe the features, risk factors, and consequences of convulsive status epilepticus (CSE) among people with active convulsive epilepsy (ACE) identified in a multisite survey in Africa. Methods: We obtained clinical histories of CSE and neurologic examination data among 1,196 people with ACE identified from a population of 379,166 people in 3 sites: Agincourt, South Africa; Iganga-Mayuge, Uganda; and Kilifi, Kenya. We performed serologic assessment for the presence of antibodies to parasitic infections and HIV and determined adherence to antiepileptic drugs. Consequences of CSE were assessed using a questionnaire. Logistic regression was used to identify risk factors. Results: The adjusted prevalence of CSE in ACE among the general population across the 3 sites was 2.3 per 1,000, and differed with site (p < 0.0001). Over half (55%) of CSE occurred in febrile illnesses and focal seizures were present in 61%. Risk factors for CSE in ACE were neurologic impairments, acute encephalopathy, previous hospitalization, and presence of antibody titers to falciparum malaria and HIV; these differed across sites. Burns (15%), lack of education (49%), being single (77%), and unemployment (78%) were common in CSE; these differed across the 3 sites. Nine percent with and 10% without CSE died. Conclusions: CSE is common in people with ACE in Africa; most occurs with febrile illnesses, is untreated, and has focal features suggesting preventable risk factors. Effective prevention and the management of infections and neurologic impairments may reduce the burden of CSE in ACE.

Published
2015

13. Haptoglobin, alpha-thalassaemia and glucose-6-phosphate dehydrogenase polymorphisms and risk of abnormal transcranial Doppler among patients with sickle cell anaemia in Tanzania

Author

Sharon E, Cox, Julie, Makani, Deogratias, Soka, Veline S, L'Esperence, Edward, Kija, Paula, Dominguez-Salas, Charles R J, Newton, Anthony A, Birch, Andrew M, Prentice, and Fenella J, Kirkham

Subjects
Male, Adolescent, Genotype, Ultrasonography, Doppler, Transcranial, Anemia, Sickle Cell, Glucosephosphate Dehydrogenase, Polymorphism, Single Nucleotide, Young Adult, alpha-Thalassemia, children, Risk Factors, Humans, Red Cells and Iron, Child, Haptoglobins, Homozygote, cerebral blood flow velocity, Infant, Epistasis, Genetic, Cerebrovascular Circulation, Child, Preschool, Africa, Female, sickle cell disease, Blood Flow Velocity, Gene Deletion, Research Paper
Abstract

Summary Transcranial Doppler ultrasonography measures cerebral blood flow velocity (CBFv) of basal intracranial vessels and is used clinically to detect stroke risk in children with sickle cell anaemia (SCA). Co‐inheritance in SCA of alpha‐thalassaemia and glucose‐6‐phosphate dehydrogenase (G6PD) polymorphisms is reported to associate with high CBFv and/or risk of stroke. The effect of a common functional polymorphism of haptoglobin (HP) is unknown. We investigated the effect of co‐inheritance of these polymorphisms on CBFv in 601 stroke‐free Tanzanian SCA patients aged

Published
2013

14. Using participatory rural appraisal (PRA) in the identification of children with disabilities in rural Kilifi, Kenya

Author

Joseph K, Gona, Sally, Hartley, and Charles R J, Newton

Subjects
Male, Rural Population, Health Knowledge, Attitudes, Practice, Adolescent, Community Participation, Focus Groups, Community Networks, Faculty, Kenya, Disabled Children, Leadership, Humans, Female, Rural Health Services, Child, Qualitative Research
Abstract

Cross-sectional surveys have been used widely for identifying children with disabilities, but they have several disadvantages. The surveys concentrate on identifying impairments and do not encourage the participation and ownership of the community. Participatory rural appraisal (PRA) provides a cost-effective and efficient method that reflects the local perceptions of disability and involves local people. These factors are important for sustainability in resource-poor countries.To evaluate the application of PRA to identifying children with disabilities in a rural setting.PRA was used to identify children with disabilities in two rural sub-locations in Kilifi, Kenya. Data were collected through 12 focus group discussions and 12 social mapping activities. A purposive convenience sample of teachers, village leaders and women groups participated in the PRA. The perceptions of disability were established before identification of the children. The categories of identification were based on these local perceptions. The qualitative data were analyzed thematically and validation was performed through triangulation.Disability was perceived locally as the existence of impairments, activity limitations and participation restrictions. Disabilities were associated with traditional beliefs including witchcraft, evil spirits and punishments from God. In some cases these categories were mutually exclusive and in others they were concurrent. Children who had lost their parents and were not being cared for by relatives (disadvantaged orphans) were also perceived as disabled children by teachers and local women, but not by community leaders.The results suggest that PRA is an efficient and cost-effective method of identifying children with disabilities according to local perceptions, and it may be useful in community-based rehabilitation as an alternative to surveys.

Published
2006

15. Observational study: 27 years of severe malaria surveillance in Kilifi, Kenya

Author

Patricia Njuguna, Kathryn Maitland, Amek Nyaguara, Daniel Mwanga, Polycarp Mogeni, Neema Mturi, Shebe Mohammed, Gabriel Mwambingu, Caroline Ngetsa, Kenedy Awuondo, Brett Lowe, Ifedayo Adetifa, J. Anthony G. Scott, Thomas N. Williams, Sarah Atkinson, Faith Osier, Robert W. Snow, Kevin Marsh, Benjamin Tsofa, Norbert Peshu, Mainga Hamaluba, James A. Berkley, Charles R. J. Newton, John Fondo, Anisa Omar, and Philip Bejon

Subjects
Severe malaria, Secular trend, Mortality, Africa, Longitudinal surveillance, Medicine
Abstract

Abstract Background Many parts of Africa have witnessed reductions in Plasmodium falciparum transmission over the last 15 years. Since immunity to malaria is acquired more rapidly at higher transmission, the slower acquisition of immunity at lower transmission may partially offset the benefits of reductions in transmission. We examined the clinical spectrum of disease and predictors of mortality after sustained changes in transmission intensity, using data collected from 1989 to 2016. Methods We conducted a temporal observational analysis of 18,000 children, aged 14 days to 14 years old, who were admitted to Kilifi County Hospital, Kenya, from 1989 to 2016 with malaria. We describe the trends over time of the clinical and laboratory criteria for severe malaria and associated risk of mortality. Results During the time periods 1989–2003, 2004–2008, and 2009–2016, Kilifi County Hospital admitted averages of 657, 310, and 174 cases of severe malaria per year including averages of 48, 14, and 12 malaria-associated deaths per year, respectively. The median ages in years of children admitted with cerebral malaria, severe anaemia, and malaria-associated mortality were 3.0 (95% confidence interval (CI) 2.2–3.9), 1.1 (95% CI 0.9–1.4), and 1.1 (95% CI 0.3–2.2) in the year 1989, rising to 4.9 (95% CI 3.9–5.9), 3.8 (95% CI 2.5–7.1), and 5 (95% CI 3.3–6.3) in the year 2016. The ratio of children with cerebral malaria to severe anaemia rose from 1:2 before 2004 to 3:2 after 2009. Hyperparasitaemia was a risk factor for death after 2009 but not in earlier time periods. Conclusion Despite the evidence of slower acquisition of immunity, continued reductions in the numbers of cases of severe malaria resulted in lower overall mortality. Our temporal data are limited to a single site, albeit potentially applicable to a secular trend present in many parts of Africa.

Published
2019
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17. Evaluation of the INTERGROWTH-21st Neurodevelopment Assessment (INTER-NDA) in 2 year-old children.

Author

Elizabeth Murray, Michelle Fernandes, Charles R J Newton, Amina Abubakar, Stephen H Kennedy, Jose Villar, and Alan Stein

Subjects
Medicine, Science
Abstract

The INTER-NDA is a novel assessment of early child development measuring cognition, language, motor skills, behaviour, attention, and socio-emotional reactivity in 2 year olds in 15 minutes. Here, we present the results of an evaluation of the INTER-NDA against the Bayley Scales of Infant Development III edition (BSID-III), its sensitivity and specificity and its psychometric properties.Eighty-one infants from Oxford, UK, aged 23.1-28.3 months, were evaluated using the INTER-NDA and the BSID-III. The agreement between the INTER-NDA and the BSID-III was assessed using interclass correlations (for absolute agreement), Bland-Altman analyses (for bias and limits of agreement), and sensitivity and specificity analyses (for accuracy). The internal consistency of the INTER-NDA and uni-dimensionality of its subscales were also determined.The interclass correlation coefficients between the BSID-III and the INTER-NDA cognitive, motor and behaviour scores ranged between 0.745 and 0.883 (p

Published
2018
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18. Iron deficiency and acute seizures: results from children living in rural Kenya and a meta-analysis.

Author

Richard Idro, Samson Gwer, Thomas N Williams, Tuda Otieno, Sophie Uyoga, Gregory Fegan, Piet A Kager, Kathryn Maitland, Fenella Kirkham, Brian G R Neville, and Charles R J Newton

Subjects
Medicine, Science
Abstract

There are conflicting reports on whether iron deficiency changes susceptibility to seizures. We examined the hypothesis that iron deficiency is associated with an increased risk of acute seizures in children in a malaria endemic area.We recruited 133 children, aged 3-156 months, who presented to a district hospital on the Kenyan coast with acute seizures and frequency-matched these to children of similar ages but without seizures. We defined iron deficiency according to the presence of malarial infection and evidence of inflammation. In patients with malaria, we defined iron deficiency as plasma ferritin

Published
2010
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