Evidence from Low and Middle Income Countries
Dengue is a mosquito-borne viral disease that occurs mainly in the tropics and subtropics but has a high potential to spread to new areas. Dengue infections are climate sensitive, so it is important to better understand how changing climate factors affect the potential for geographic spread and futu...re dengue epidemics. Vectorial capacity (VC) describes a vector's propensity to transmit dengue taking into account human, virus, and vector interactions. VC is highly temperature dependent, but most dengue models only take mean temperature values into account. Recent evidence shows that diurnal temperature range (DTR) plays an important role in influencing the behavior of the primary dengue vector Aedes aegypti. In this study, we used relative VC to estimate dengue epidemic potential (DEP) based on the temperature and DTR dependence of the parameters of A. aegypti. We found a strong temperature dependence of DEP; it peaked at a mean temperature of 29.3°C when DTR was 0°C and at 20°C when DTR was 20°C. Increasing average temperatures up to 29°C led to an increased DEP, but temperatures above 29°C reduced DEP. In tropical areas where the mean temperatures are close to 29°C, a small DTR increased DEP while a large DTR reduced it. In cold to temperate or extremely hot climates where the mean temperatures are far from 29°C, increasing DTR was associated with increasing DEP. Incorporating these findings using historical and predicted temperature and DTR over a two hundred year period (1901-2099), we found an increasing trend of global DEP in temperate regions. Small increases in DEP were observed over the last 100 years and large increases are expected by the end of this century in temperate Northern Hemisphere regions using climate change projections. These findings illustrate the importance of including DTR when mapping DEP based on VC.
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As the war in Ukraine pushes food, fuel and fertilizer prices toward record levels putting food security in many of the world’s poorest countries at risk, the UN’s International Fund for Agricultural Development (IFAD) today launched a Crisis Response Initiative to ensure that small-scale farmer...s in high-risk countries can produce food over the next few months to feed their families and communities while reducing the threat to future harvests.
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Globalization and Health201612:53 DOI: 10.1186/s12992-016-0194-4
front cover © Hannah Maule-Ffinch/Save the Children
front cover © Jonathan Hyams/Save the Children
The 2017 Global Nutrition Report focuses on 5 key areas and finds that improving nutrition can have a powerful multiplier effect across the SDGs. Indeed, it indicates that it will be a challenge to achieve any SDG without addressing nutrition. The report shows that there is an exciting opportunity t...o achieving global nutrition targets while catalysing other development goals through ‘double duty’ and ‘triple duty’ actions, which tackle malnutrition and other development challenges could yield multiple benefits across the SDGs.
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This revision covers the main non-communicable diseases in Mozambique as well as the National Strategic Plan's aim to create a positive environment to minimize or eliminate the exposure to risk factors and guarantee access to care.
Vitamin A deficiency is a risk factor for blindness and for mortality from measles and diarrhoea in children aged 6–59 months. We aimed to estimate trends in the prevalence of vitamin A defi ciency between 1991 and 2013 and its mortality burden in low-income and middle-income countries.
For over a decade, Senegalese and international journalists, human rights advocates, and child protection experts have documented and denounced the ongoing exploitation, abuse and neglect of children living in many of Senegal’s traditional Quranic schools, or daaras. Thousands of these children, k...nown as talibés, continue to live in conditions of extreme squalor, deprived of adequate food and medical care.
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