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  1. AU="Chagumaira, Christopher"
  2. AU="Kaka, Anjum"
  3. AU="Langlois, Mélanie"
  4. AU="Bae, Byoung-Il"
  5. AU=Galili Gad
  6. AU="Diringer, Benoit"
  7. AU="Courtois, Elodie A"
  8. AU="Peters, Kristen N"
  9. AU="Gonçalves, Manuel A F V"
  10. AU="Blaskovic, Sanja"
  11. AU="Vuong, Paton"
  12. AU="de Brito, Wagner Izidoro"
  13. AU="Erin Salo"
  14. AU="Reddy, B V Subba"
  15. AU="Puhlhofer, G."
  16. AU="da Silva, Fabiana Erica Vilanova"
  17. AU="Chang Pingan"
  18. AU="John Gurnell"
  19. AU="Tang, Hon-Yin"
  20. AU="Klassen, Ben"
  21. AU=Kohsaka Shinji
  22. AU="Wenxin He"
  23. AU="He, Lin"
  24. AU="Murace, Celeste Ambra"
  25. AU="Vanini, Sven"
  26. AU=Spernovasilis Nikolaos
  27. AU="Sgouropoulou, Cleo"
  28. AU="Shyamprasad, K" AU="Shyamprasad, K"
  29. AU=Tsuda Hiroyuki
  30. AU="Arpan Bera"
  31. AU="Bilqis, Hazia Hanifa"
  32. AU=Callander Emily J
  33. AU=Oster C
  34. AU="El Aouad, Rajae"
  35. AU="Li, Han-Xu"
  36. AU="Eichhorn, Thomas"
  37. AU=Bramwell Byrom
  38. AU="Purmessur, Rushmi"
  39. AU="Fan, Chunfang"
  40. AU="Chang, Chao-Wen"
  41. AU="BENDICH, A"
  42. AU="Battista, Brad"
  43. AU="Xiong, Bing"
  44. AU="Alexandra Griffith"
  45. AU="Kawamura, Junpei"
  46. AU="Lyons, Karen M"
  47. AU="Biemans, Barbara"

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  1. Artikel: A pilot survey of selenium status and its geospatial variation among children and women in three rural districts of Zimbabwe.

    Mutonhodza, Beaula / Chagumaira, Christopher / Dembedza, Mavis P / Joy, Edward J M / Manzeke-Kangara, Muneta G / Njovo, Handrea / Nyadzayo, Tasiana K / Lark, R Murray / Kalimbira, Alexander A / Bailey, Elizabeth H / Broadley, Martin R / Matsungo, Tonderayi M / Chopera, Prosper

    Frontiers in nutrition

    2023  Band 10, Seite(n) 1235113

    Abstract: Introduction: Selenium (Se) deficiency is increasingly recognized as a public health problem in sub-Saharan Africa.: Methods: The current cross-sectional study assessed the prevalence and geospatial patterns of Se deficiency among children aged 6-59 ... ...

    Abstract Introduction: Selenium (Se) deficiency is increasingly recognized as a public health problem in sub-Saharan Africa.
    Methods: The current cross-sectional study assessed the prevalence and geospatial patterns of Se deficiency among children aged 6-59 months (
    Results: Median, Q1, and Q3 plasma Se concentrations were 61.2, 48.7, and 73.3 μg/L for women and 40.5, 31.3, and 49.5 μg/L for children, respectively. Low plasma Se concentrations (9.41 μg/L in children and 10.20 μg/L in women) indicative of severe Se deficiency risk was observed. Overall, 94.6% of children and 69.8% of women had sub-optimal Se status defined by plasma Se concentrations of <64.8 μg/L and <70 μg/L, respectively.
    Discussion: High and widespread Se deficiency among women and children in the three districts is of public health concern and might be prevalent in other rural districts in Zimbabwe. Geostatistical analysis by conditional kriging showed a high risk of Se deficiency and that the Se status in women and children in Murewa, Shamva, and Mutasa districts was driven by short-range variations of up to ⁓12 km. Selenium status was homogenous within each district. However, there was substantial inter-district variation, indicative of marked spatial patterns if the sampling area is scaled up. A nationwide survey that explores the extent and spatial distribution of Se deficiency is warranted.
    Sprache Englisch
    Erscheinungsdatum 2023-07-11
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2776676-7
    ISSN 2296-861X
    ISSN 2296-861X
    DOI 10.3389/fnut.2023.1235113
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: Mineral micronutrient status and spatial distribution among the Ethiopian population.

    Belay, Adamu / Gashu, Dawd / Joy, Edward J M / Lark, Murray R / Chagumaira, Christopher / Zerfu, Dilnesaw / Ander, Louise E / Young, Scott D / Bailey, Elizabeth H / Broadley, Martin R

    The British journal of nutrition

    2022  , Seite(n) 1–11

    Abstract: Multiple micronutrient deficiencies are widespread in Ethiopia. However, the distribution of Se and Zn deficiency risks has previously shown evidence of spatially dependent variability, warranting the need to explore this aspect for wider micronutrients. ...

    Abstract Multiple micronutrient deficiencies are widespread in Ethiopia. However, the distribution of Se and Zn deficiency risks has previously shown evidence of spatially dependent variability, warranting the need to explore this aspect for wider micronutrients. Here, blood serum concentrations for Ca, Mg, Co, Cu and Mo were measured (n 3102) on samples from the Ethiopian National Micronutrient Survey. Geostatistical modelling was used to test spatial variation of these micronutrients for women of reproductive age, who represent the largest demographic group surveyed (n 1290). Median serum concentrations were 8·6 mg dl-1 for Ca, 1·9 mg dl-1 for Mg, 0·4 µg l-1 for Co, 98·8 µg dl-1 for Cu and 0·2 µg dl-1 for Mo. The prevalence of Ca, Mg and Co deficiency was 41·6 %, 29·2 % and 15·9 %, respectively; Cu and Mo deficiency prevalence was 7·6 % and 0·3 %, respectively. A higher prevalence of Ca, Cu and Mo deficiency was observed in north western, Co deficiency in central and Mg deficiency in north eastern parts of Ethiopia. Serum Ca, Mg and Mo concentrations show spatial dependencies up to 140-500 km; however, there was no evidence of spatial correlations for serum Co and Cu concentrations. These new data indicate the scale of multiple mineral micronutrient deficiency in Ethiopia and the geographical differences in the prevalence of deficiencies suggesting the need to consider targeted responses during the planning of nutrition intervention programmes.
    Sprache Englisch
    Erscheinungsdatum 2022-02-03
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 280396-3
    ISSN 1475-2662 ; 0007-1145
    ISSN (online) 1475-2662
    ISSN 0007-1145
    DOI 10.1017/S0007114522000319
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel ; Online: Zinc deficiency is highly prevalent and spatially dependent over short distances in Ethiopia.

    Belay, Adamu / Gashu, Dawd / Joy, Edward J M / Lark, R Murray / Chagumaira, Christopher / Likoswe, Blessings H / Zerfu, Dilnesaw / Ander, E Louise / Young, Scott D / Bailey, Elizabeth H / Broadley, Martin R

    Scientific reports

    2021  Band 11, Heft 1, Seite(n) 6510

    Abstract: Zinc (Zn) is an essential nutrient for human health. In Ethiopia, a high prevalence of Zn deficiency has been reported. To explore demographic variation and spatial dependencies in the Zn status of the Ethiopian population, we analyzed archived serum ... ...

    Abstract Zinc (Zn) is an essential nutrient for human health. In Ethiopia, a high prevalence of Zn deficiency has been reported. To explore demographic variation and spatial dependencies in the Zn status of the Ethiopian population, we analyzed archived serum samples (n = 3373) from the 2015 Ethiopian National Micronutrient Survey (ENMS), a cross-sectional survey of young children, school-age children, women of reproductive age (WRA) and men conducted in all 9 regions and two city administration of Ethiopia. Serum Zn concentrations, measured using inductively coupled plasma-mass spectrometry (ICPMS), were compared to thresholds based on age, sex, fasting status, and time of blood collection, after adjusting for inflammation status. Median serum Zn concentration of the population was 57.5 μg dL
    Mesh-Begriff(e) Adolescent ; Adult ; Age Factors ; Child ; Ethiopia ; Female ; Humans ; Male ; Middle Aged ; Prevalence ; Zinc/blood ; Zinc/deficiency
    Chemische Substanzen Zinc (J41CSQ7QDS)
    Sprache Englisch
    Erscheinungsdatum 2021-03-22
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-021-85977-x
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel: Selenium Deficiency Is Widespread and Spatially Dependent in Ethiopia

    Belay, Adamu / Joy, Edward J. M / Chagumaira, Christopher / Zerfu, Dilnesaw / Ander, E. Louise / Young, Scott D / Bailey, Elizabeth H / Lark, R. Murray / Broadley, Martin R / Gashu, Dawd

    Nutrients. 2020 May 27, v. 12, no. 6

    2020  

    Abstract: Selenium (Se) is an essential element for human health and livestock productivity. Globally, human Se status is highly variable, mainly due to the influence of soil types on the Se content of crops, suggesting the need to identify areas of deficiency to ... ...

    Abstract Selenium (Se) is an essential element for human health and livestock productivity. Globally, human Se status is highly variable, mainly due to the influence of soil types on the Se content of crops, suggesting the need to identify areas of deficiency to design targeted interventions. In sub-Saharan Africa, including Ethiopia, data on population Se status are largely unavailable, although previous studies indicated the potential for widespread Se deficiency. Serum Se concentration of a nationally representative sample of the Ethiopian population was determined, and these observed values were combined with a spatial statistical model to predict and map the Se status of populations across the country. The study used archived serum samples (n = 3269) from the 2015 Ethiopian National Micronutrient Survey (ENMS). The ENMS was a cross-sectional survey of young and school-age children, women and men. Serum Se concentration was measured using inductively coupled plasma mass spectrometry (ICPMS). The national median (Q1, Q3) serum Se concentration was 87.7 (56.7, 123.0) μg L⁻¹. Serum Se concentration differed between regions, ranging from a median (Q1, Q3) of 54.6 (43.1, 66.3) µg L⁻¹ in the Benishangul-Gumuz Region to 122.0 (105, 141) µg L⁻¹ in the Southern Nations, Nationalities, and Peoples’ Region and the Afar Region. Overall, 35.5% of the population were Se deficient, defined as serum Se < 70 µg L⁻¹. A geostatistical analysis showed that there was marked spatial dependence in Se status, with serum concentrations greatest among those living in North-East and Eastern Ethiopia and along the Rift Valley, while serum Se concentrations were lower among those living in North-West and Western Ethiopia. Selenium deficiency in Ethiopia is widespread, but the risk of Se deficiency is highly spatially dependent. Policies to enhance Se nutrition should target populations in North-West and Western Ethiopia.
    Schlagwörter atomic absorption spectrometry ; blood serum ; cross-sectional studies ; geostatistics ; human health ; humans ; livestock productivity ; nutrition ; population ; risk ; selenium ; soil ; statistical models ; surveys ; Ethiopia
    Sprache Englisch
    Erscheinungsverlauf 2020-0527
    Erscheinungsort Multidisciplinary Digital Publishing Institute
    Dokumenttyp Artikel
    Anmerkung NAL-light
    ZDB-ID 2518386-2
    ISSN 2072-6643
    ISSN 2072-6643
    DOI 10.3390/nu12061565
    Datenquelle NAL Katalog (AGRICOLA)

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  5. Artikel ; Online: Selenium Deficiency Is Widespread and Spatially Dependent in Ethiopia.

    Belay, Adamu / Joy, Edward J M / Chagumaira, Christopher / Zerfu, Dilnesaw / Ander, E Louise / Young, Scott D / Bailey, Elizabeth H / Lark, R Murray / Broadley, Martin R / Gashu, Dawd

    Nutrients

    2020  Band 12, Heft 6

    Abstract: ...

    Abstract :
    Mesh-Begriff(e) Adolescent ; Adult ; Child ; Child, Preschool ; Cross-Sectional Studies ; Ethiopia/epidemiology ; Female ; Glutathione Peroxidase/metabolism ; Humans ; Iodide Peroxidase/metabolism ; Male ; Malnutrition/epidemiology ; Micronutrients/blood ; Micronutrients/deficiency ; Middle Aged ; Selenium/blood ; Selenium/deficiency ; Young Adult
    Chemische Substanzen Micronutrients ; GPX3 protein, human (EC 1.11.1.-) ; Iodide Peroxidase (EC 1.11.1.8) ; Glutathione Peroxidase (EC 1.11.1.9) ; Selenium (H6241UJ22B)
    Sprache Englisch
    Erscheinungsdatum 2020-05-27
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2518386-2
    ISSN 2072-6643 ; 2072-6643
    ISSN (online) 2072-6643
    ISSN 2072-6643
    DOI 10.3390/nu12061565
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  6. Artikel: Use patterns of natural resources supporting livelihoods of smallholder communities and implications for climate change adaptation in Zimbabwe

    Chagumaira, Christopher / Rurinda, Jairos / Nezomba, Hatirarami / Mtambanengwe, Florence / Mapfumo, Paul

    Environment, development and sustainability

    Band v. 18,, Heft no. 1

    Abstract: Declining crop and livestock production due to a degrading land resource base and changing climate among other biophysical and socio-economic constraints, is increasingly forcing rural households in Zimbabwe and other parts of Southern Africa to rely on ... ...

    Abstract Declining crop and livestock production due to a degrading land resource base and changing climate among other biophysical and socio-economic constraints, is increasingly forcing rural households in Zimbabwe and other parts of Southern Africa to rely on common natural resource pools (CNRPs) to supplement their household food and income. Between 2011 and 2013, we combined farmer participatory research approaches, remote sensing and geographic information systems (GIS) to (1) understand the contribution of CNRPs to household food and income in Dendenyore and Ushe smallholder communities in Hwedza District, eastern Zimbabwe and (2) assess changes of the CNRPs in both space and time, and their implications on climate change adaptation. Across study sites, wetlands and woodlands were ranked as the most important CNRPs. Extraction and use patterns of products from the different pools differed among households of different resource endowment. Resource-constrained households (RG3) sold an average of 183 kg household⁻¹ year⁻¹ of wild loquats fruits (Uapaca kirkiana), realising about US$48, while resource-endowed farmers (RG1) had no need to sale any. The RG3 households also realised approximately US$70 household⁻¹ year⁻¹ from sale of crafts made from water reeds (Phragmites mauritianus). Empirical data closely supported communities’ perceptions that CNRPs had declined significantly in recent years compared with two to three decades ago. More than 60 % of the respondents perceived that the availability of natural resources drawn from wetlands and woodlands, often used for food, energy and crafts, has decreased markedly since the 1980s. Classification of land cover in a GIS environment indicated that CNRPs declined between 1972 and 2011, supporting farmers’ perceptions. Overall, woodlands declined by 37 % in both communities, while the total area under wetlands decreased by 29 % in Ushe, a drier area and 49 % in Dendenyore, a relatively humid area. The over-reliance in CNRPs by rural communities could be attributed to continued decline in crop yields linked to increased within-season rainfall variability, and the absence of alternative food and income sources. This suggests limited options for rural communities to adapt to the changing food production systems in the wake of climate change and variability and other challenges such as declining soil fertility. There is therefore a need to design adaptive farm management options that enhance both crop and livestock production in a changing climate as well as identifying other livelihood alternatives outside agriculture to reduce pressure on CNRPs. In addition, promotion of alternative sources of energy such as solar power and biogas among rural communities could reduce the cutting of trees for firewood from woodlands.
    Schlagwörter socioeconomics ; land cover ; space and time ; Phragmites ; crop yield ; rural communities ; on-farm research ; Uapaca kirkiana ; climate change ; livelihood ; households ; geographic information systems ; income ; handicrafts ; livestock production ; rain ; land classification ; woodlands ; farm management ; soil fertility ; fruits ; biogas ; fuelwood ; production technology ; cutting ; solar energy ; loquats ; farmers ; wetlands ; trees ; food production ; energy ; remote sensing
    Sprache Englisch
    Dokumenttyp Artikel
    ISSN 1387-585X
    Datenquelle AGRIS - International Information System for the Agricultural Sciences and Technology

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