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    AuthorAdebamowo, S.N. (2)Adebamowo, C.A. (1)Adeyemo, Adelbowale A. (1)Kinyera, T. (1)Maziarz, M. (1)Mulder, N. (1)Mwenda, J.M. (1)Otim, I. (1)Sow, S.O. (1)Steele, A.D. (1)View MoreSubject
    Africa (4)
    Genomics (2)Bioinformatics (1)Burkitt lymphoma (1)Cardiometabolic disorders (1)Coronary heart disease (1)Diabetes (1)Dyslipidemia (1)Epidemiology (1)Genetics (1)View MoreDate Issued
    2017 (4)

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    Genomics of cardiometabolic disorders in Sub-Saharan Africa

    Adebamowo, S.N.; Tekola-Ayele, F.; Adeyemo, Adelbowale A. (S. Karger AG, 2017)
    Sub-Saharan Africa (SSA) is experiencing a growing burden of cardiometabolic disorders, including diabetes, dyslipidemia, hypertension, obesity, coronary heart disease, and stroke. The increasing trends are expected to accelerate as SSA continues to experience economic progress, population growth, and the shift from communicable to noncommunicable diseases. These complex disorders are caused by multiple, potentially interacting, environmental, and genetic factors. While considerable progress has been made in the identification of the sociocultural, demographic, and lifestyle risk factors for cardiometabolic disorders, many genetic factors that underlie individual susceptibility to these diseases remain largely unknown. Although progress in genomic technologies has allowed for systematic characterization of genome-wide genetic diversity in health and disease in European and Asian ancestry populations, conduct of genetic studies in SSA has been underwhelming until recently. Here, we summarize recent understanding of the body of knowledge and highlight research opportunities on the genomics of cardiometabolic disorders in SSA. Copyright 2017 S. Karger AG, Basel.
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    Genomic research data generation, analysis and sharing - challenges in the African setting

    Mulder, N.; Adebamowo, C.A.; Adebamowo, S.N. (Ubiquity Press Ltd, 2017)
    Genomics is the study of the genetic material that constitutes the genomes of organisms. This genetic material can be sequenced and it provides a powerful tool for the study of human, plant and animal evolutionary history and diseases. Genomics research is becoming increasingly commonplace due to significant advances in and reducing costs of technologies such as sequencing. This has led to new challenges including increasing cost and complexity of data. There is, therefore, an increasing need for computing infrastructure and skills to manage, store, analyze and interpret the data. In addition, there is a significant cost associated with recruitment of participants and collection and processing of biological samples, particularly for large human genetics studies on specific diseases. As a result, researchers are often reluctant to share the data due to the effort and associated cost. In Africa, where researchers are most commonly at the study recruitment, determination of phenotypes and collection of biological samples end of the genomic research spectrum, rather than the generation of genomic data, data sharing without adequate safeguards for the interests of the primary data generators is a concern. There are substantial ethical considerations in the sharing of human genomics data. The broad consent for data sharing preferred by genomics researchers and funders does not necessarily align with the expectations of researchers, research participants, legal authorities and bioethicists. In Africa, this is complicated by concerns about comprehension of genomics research studies, quality of research ethics reviews and understanding of the implications of broad consent, secondary analyses of shared data, return of results and incidental findings. Additional challenges with genomics research in Africa include the inability to transfer, store, process and analyze large-scale genomics data on the continent, because this requires highly specialized skills and expensive computing infrastructure which are often unavailable. Recently initiatives such as H3Africa and H3ABioNet which aim to build capacity for large-scale genomics projects in Africa have emerged. Here we describe such initiatives, including the challenges faced in the generation, analysis and sharing of genomic data and how these challenges are being overcome. Copyright 2017 The Author(s).
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    Age and geographic patterns of Plasmodium falciparum malaria infection in a representative sample of children living in Burkitt lymphoma-endemic areas of northern Uganda

    Maziarz, M.; Kinyera, T.; Otim, I. (BioMed Central Ltd., 2017)
    Background: Falciparum malaria is an important risk factor for African Burkitt lymphoma (BL), but few studies have evaluated malaria patterns in healthy BL-age children in populations where both diseases are endemic. To obtain accurate current data, patterns of asymptomatic malaria were investigated in northern Uganda, where BL is endemic. Methods: Between 2011 and 2015, 1150 apparently healthy children under 15 years old were sampled from 100 villages in northern Uganda using a stratified, multi-stage, cluster survey design. Falciparum malaria prevalence (pfPR) was assessed by questionnaire, rapid diagnostic test (RDT) and thick film microscopy (TFM). Weighted pfPR and unadjusted and adjusted associations of prevalence with covariates were calculated using logistic models and survey methods. Results: Based on 1143 children successfully tested, weighted pfPR was 54.8% by RDT and 43.4% by TFM. RDT sensitivity and specificity were 97.5 and 77.8%, respectively, as compared to TFM, because RDT detect malaria antigens, which persist in peripheral blood after clinical malaria, thus results based on RDT are reported. Weighted pfPR increased from 40% in children aged under 2 years to 61.8% in children aged 6–8 years (odds ratio 2.42, 95% confidence interval (CI) 1.26–4.65), then fell slightly to 49% in those aged 12–15 years. Geometric mean parasite density was 1805.5 parasites/µL (95% CI 1344.6–2424.3) among TFM-positive participants, and it was higher in children aged <5 years at 5092.9/µL (95% CI 2892.7–8966.8) and lower in those aged ≥10 years at 983.8/µL (95% CI 472.7–2047.4; P = 0.001). Weighted pfPR was lower in children residing in sub-regions employing indoor residual spraying (IRS) than in those residing in non-IRS sub-regions (32.8 versus 65.7%; OR 0.26, 95% CI 0.14, 0.46). However, pfPR varied both within IRS (3.2–55.3%) and non-IRS sub-regions (29.8–75.8%; Pheterogeneity <0.001). pfPR was inversely correlated with a child’s mother’s income (P = 0.011) and positively correlated with being enrolled in the wet season (P = 0.076), but sex was irrelevant. Conclusions: The study observed high but geographically and demographically heterogenous patterns of asymptomatic malaria prevalence among children living in northern Uganda. These results provide important baseline data that will enable precise evaluation of associations between malaria and BL. Copyright 2017 The Author(s).
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    Reaching every child with rotavirus vaccine: Report from the 10th African rotavirus symposium held in Bamako, Mali

    Sow, S.O.; Steele, A.D.; Mwenda, J.M. (Elsevier Ltd, 2017)
    The Center for Vaccine Development – Mali (CVD – Mali), the World Health Organization’s regional office in Africa (WHO/AFRO), and the CVD at the University of Maryland School of Medicine hosted the 10th African Rotavirus Symposium in Bamako, Mali on 1–2 June 2016. The symposium is coordinated by WHO/AFRO, the Regional Rotavirus Reference Laboratories, and the African Rotavirus Network (ARN), with support from the Bill & Melinda Gates Foundation. The event brings together leading rotavirus researchers, scientists, and policy-makers from across Africa and the world. Over 150 participants, from 31 countries, including 27 in Africa, joined forces to address the theme “Reaching Every Child in Africa with Rotavirus Vaccines.” This symposium, the first in francophone Africa, occurred at an unprecedented time when 33 African countries had introduced rotavirus vaccines into their national immunization programs. The symposium concluded with a Call to Action to introduce rotavirus vaccines in the 21 remaining African countries, to increase access in countries with existing vaccination programs, and to continue surveillance and research on rotavirus and other diarrheal diseases. Copyright 2017
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