Articles tagged with Africa
Researchers studied paleoclimate data to understand historical patterns of aridity in Eastern Africa, revealing a clear pattern of dry and wet periods. Climate model simulations showed that sea surface temperatures in the Indian Ocean drive rainfall variations in East Africa.
Researchers found divergent mtDNA lineages in Bantu-speaking groups from Zambia, which were incorporated into their genepool through intermarriage with indigenous Khoisan women. These relic lineages demonstrate that Khoisan peoples survived until the present day despite the extinction of their source populations.
Researchers warn of bleak outlook for savanna fuelwood supplies in Africa, with potential exhaustion in 13 years. To avoid this, reducing fuelwood use by 15% annually is proposed until only 20% of households rely on it.
The African Partnership for Chronic Disease Research will collect detailed health and disease information from over 24,000 individuals across 10 countries. This will provide a unique framework for researchers in these countries and enable the development of long-term strategies for disease control and management.
Invasive cervical cancer is a leading cause of death in women from Sub-Saharan Africa, where access to health services increases detection rates. A study found that HPV testing was most sensitive, but specificity was reduced compared to pap smears and visual inspection of the cervix.
A recent study published in PNAS found evidence of gene flow from India to Australia around 4,230 years ago, challenging the notion that Australia remained isolated between initial colonization and European arrival. This migration also shares a common origin with populations from New Guinea and the Philippines.
A study published in Climatic Change reveals that global warming has increased monthly heat records by a factor of 5 worldwide. The researchers found that 80% of observed monthly records would not have occurred without human influence on climate, highlighting the urgent need for adaptation.
In Ethiopia, a study found that only 66% of patients with HIV disclosed their status to their spouse, while 17% disclosed to siblings and 16.8% to other relatives. The lack of disclosure hinders treatment and prevention efforts.
Research reveals that yeast species and fungal communities on grape surfaces can create differences in wine flavor even among grapes from the same vineyard. The study's findings suggest that viticulturalists and winemakers can plan microharvests better and implement more consistent wine blending strategies.
Researchers found that the environment transitioned rapidly between a closed woodland and an open grassland, triggering evolutionary changes. The team used lake sediments and biomarkers to reconstruct the types of vegetation present, revealing a correlation between environmental changes and planetary movement.
Researchers at the University of Florida have discovered nearly 50 new species of leaf-mining moths in the Congo, doubling the number previously known from the region. The moths have unusual survival strategies and some species can delay plant aging.
A study published in PLOS Medicine found that global infertility rates have remained steady since 1990, with 1.9% of women aged 20 unable to conceive and 10.5% of those who previously gave birth unable to have another child. The levels of infertility varied by region, with higher rates in North Africa and the Middle East.
A University of Alberta researcher's findings may rewrite the history of humanity's migration out of Africa. The study uncovered fossils, artifacts, and evidence of continuous human occupation in the region dating back at least 200,000 years.
The Global Burden of Disease Study 2010 reveals massive shifts in health trends worldwide, with people living longer but sicker. Chronic diseases and injuries are now the primary causes of death, driven by a growing global population.
Global life expectancy has increased by 11.1 years for men and 12.1 years for women since 1970. Notable gains in life expectancy have been observed in the Maldives, Bangladesh, Bhutan, Iran, and Peru. However, some countries, such as Haiti, Lesotho, Belarus, and Ukraine, have experienced significant declines due to various factors like...
A study from the University of Copenhagen found that a drought in the Horn of Africa led to a delayed arrival of European songbirds in northern Europe, causing them to stay longer in Africa. This delay resulted in a late breeding year, but researchers believe it may not have affected population size.
Researchers have discovered that African Homo sapiens developed significant technologies, including abstract art, jewellery, and bone tools, around 75,000 years ago. This breakthrough supports the idea that Africa was the birthplace of modern human behaviour and cognition.
The study estimates that only 32,000 to 35,000 lions remain on the savannah, down from nearly 100,000 in 1960. The research identified 67 isolated areas of savannah with low human impacts and densities, but most are in West Africa, where lion populations have declined drastically.
A new study published in AIDS Journal found that HIV subtype distribution is strongly influenced by spatial accessibility and transportation networks in Africa. The research used advanced mapping techniques to assess the role of 'spatial connectivity' in the spread of HIV across sub-Saharan Africa.
A new study reveals lions have lost 75% of their original natural habitat in Africa, leading to devastating declines in lion populations across the continent. The research identifies only 67 isolated regions with significant lion populations, highlighting the urgent need for conservation efforts.
Grand Challenges Canada awards $100,000 grants to innovators worldwide for bold ideas to tackle health problems in resource-poor countries. Researchers are developing new technologies, such as a high-tech wristband to monitor pregnant women's vital signs and a trading system that rewards vaccination with farm inputs.
Research suggests that the fine crafting of handaxes by Homo erectus/ergaster in the Lower Palaeolithic period was driven by a desire to prove trustworthiness rather than physical fitness. The 'trustworthy handaxe theory' proposes that attention to detail is about demonstrating emotional reliability and capacity for strong relationships.
A rapid Xpert test for tuberculosis (TB) could reduce TB deaths and improve treatment outcomes in southern Africa. Implementing the test is expected to prevent an estimated 132,000 TB cases and 182,000 TB deaths over 10 years, but would increase health service costs by US$460 million.
The Vision for Change project aims to increase cocoa yields and improve farmer livelihoods through agroforestry practices, research on improved varieties, and market support. By leveraging private-public partnerships, Mars Inc. and ICRAF hope to scale up the initiative to millions of farmers across West Africa.
A $243,000 NSF grant will help understand and quantify interactions between human conflict and natural systems in the Lake Victoria region. The project aims to improve regional fisheries management and sustain aquatic resources critical for local inhabitants.
Josiah Tlou, a renowned educator and international expert, has been named Distinguished Global Scholar by the National Council for the Social Studies. His contributions include developing social studies curricula in Malawi and promoting education through partnerships with USAID and UNICEF.
The MenAfriVac meningitis A vaccine has been approved for use outside the cold chain for up to four days, enabling expanded access to vaccination programs. The vaccine's heat stability has been validated through a rigorous review and pilot use in Benin, with promising results showing reduced disease burden and herd immunity.
An international advisory group argues that female genital surgeries are poorly understood and unfairly characterized, citing medical research and cultural complexities. The practice is often misconstrued as mutilation and a violation of human rights, but experts argue it's an aesthetic enhancement in many societies.
Kent Campbell, PATH's Malaria Control Program director, received the LePrince Medal for his work on controlling malaria in Africa. Through his leadership, more than one million child deaths have been prevented, and Zambia became the first country to achieve high coverage with malaria control tools.
Researchers identified trust as a crucial factor in the success or failure of agbiotech public-private partnerships. The study found that integrity, open communication, and accountability were essential components of trust in these partnerships, while a lack of transparency and poor performance can erode trust.
A new $2 million grant will support a pan-continental bioinformatics research network in Africa. The H3ABioNet project aims to aggregate and analyze large datasets, establish collaborations among preexisting centers, and train African students and scientists in bioinformatics.
Researchers are exploring genetic differences to improve TB treatment outcomes in Sub-Saharan Africa. The study aims to identify genes that affect the effectiveness and reaction to anti-TB drugs, with potential benefits for patients with HIV/AIDS.
Tropical Storm Murjan made landfall on October 25 in eastern Somalia, just south of Cape Guardafui. The storm's western half brought thunderstorms with cloud top temperatures as cold as -63F (-52C), potentially leading to heavy rainfall.
Meat from wild animals like antelope and rodents is increasingly important in African diets due to scarcity of traditional livestock. Researchers highlight the nutritional value of bushmeat, providing protein, calories, vitamins, and minerals.
Researchers discovered that migratory birds carrying ticks can transmit Crimean-Congo Haemorrhagic fever to new areas in southern Europe. The study found one bird species, the woodchat shrike, was a carrier of virus-infected ticks.
The report highlights poor road safety, traffic congestion, and air pollution in Africa, with urban populations expanding at unprecedented rates. It makes recommendations for sustainable transport policies based on five central principles to maximize accessibility and equity.
A new study by the University of Colorado Boulder team analyzed extensive climate datasets and violent conflicts in East Africa, finding moderate increases in temperature reduce conflict risk slightly, while very hot temperatures increase it. Socioeconomic factors have a much greater impact on conflict risk than climate change.
Researchers discovered that beetles roll their dung balls to avoid overheating, and climb on top of them to regulate body temperature. This behavior is especially prevalent during the midday sun, with beetles climbing their balls seven times as often as those on cooler ground.
A new Stanford analysis integrates genetic and anthropological data to provide a comprehensive understanding of human expansion out of Africa. The study reveals that this event had a significant impact on human genetic diversity, which persists in present-day populations.
Grandmothers Against Poverty and AIDS (GAPA) empowers grandmothers caring for HIV/AIDS-affected families with peer support, income-generating activities. Studies show GAPA members experience higher self-esteem and reduced poverty, stigma in their community.
A 12-year-long study by ICRAF reveals that combining legume trees with maize fields increases yield stability and reduces fertilizer use. This sustainable solution helps farmers cope with droughts and degraded soils, producing consistent and relatively high yields year after year.
A new report by Panthera reveals widespread illegal hunting and bushmeat trade in African savannas, posing significant ecological, economic, and social impacts. The report highlights the urgent need for greater efforts to address this issue, or risk losing valuable wildlife resources.
Researchers estimate that modern humans and Neandertals interbred around 37,000 to 86,000 years ago, with the most recent encounters occurring well after modern humans migrated outside of Africa. This suggests that Neandertals had children with the ancestors of present-day people outside of Africa.
A new species of plant-eating dwarf dinosaur, Pegomastax africanus, has been discovered in southern Africa. The species had a unique combination of features, including a short parrot-shaped beak and stabbing canines that were likely used for self-defense and competitive sparring.
A new study reveals the emergence and spread of invasive non-Typhoidal Salmonella disease in sub-Saharan Africa, which has a significant mortality rate of up to 45% in infected people. The disease is caused by a rapidly evolving form of Salmonella Typhimurium that acquired resistance to multiple front-line drugs.
The largest genomic study ever conducted among Khoe and San groups reveals that these groups from southern Africa are descendants of the earliest diversification event in human history. The research found evidence of local adaptation in different Khoe and San groups, as well as surprising stratification among the groups.
In Niger, child mortality rates dropped significantly between 1998 and 2009, with deaths per 1,000 live births decreasing from 226 to 128. The country's universal healthcare system and scale-up of insecticide-treated bed nets, vitamin A supplementation, and community-based treatment also contributed to the decline.
Researchers propose a new way to restore Africa's depleted soils through 'perenniation,' which combines food crops with trees and perennial plants, reducing the need for artificial inputs and improving soil health.
Despite negative stereotypes, religious groups in Africa promote medical solutions and provide care for those affected by HIV/AIDS. Many congregations actively engage both faith and biomedical approaches to address the epidemic.
A recent study suggests that funding agencies should focus on providing a stable blood supply in sub-Saharan Africa. The authors argue that current policies and practices are not suitable for the region's emergency blood transfusion needs. This could lead to long-term reliance on external funding, making services unaffordable.
The Lancet's new series on universal health coverage (UHC) examines its effects on population health, government involvement, and progress in low-income countries. UHC is recognized as a key concept for improving health and increasing societal resilience.
A UCLA study challenges the World Health Organization's approach to HIV prevention in South Africa, suggesting it could lead to millions developing drug-resistant strains and costing billions more than estimated. The researchers argue that providing treatment to those in need would be more effective and cost-efficient.
A UCLA study challenges the World Health Organization's approach to HIV prevention in South Africa, suggesting a 'test and treat' strategy could be more effective but costly. The researchers predict that treating the 1.6 million people who need treatment would be very effective as a form of 'treatment as prevention,' bringing the epide...
A hybrid chicken known as the Kuroiler is being introduced in rural Uganda to improve productivity and provide economic benefits to local families. The project aims to increase returns from family flocks and reduce poverty among hundreds of thousands of households.
A new collection of articles introduces methodological innovations for estimating child mortality, crucial for monitoring progress toward the MDG goal. The UN IGME's evidence-based estimates are necessary for planning national and global health strategies.
Dartmouth medical research has made a breakthrough in developing a new tuberculosis vaccine, DAR-901. The vaccine, produced by growing bacteria related to TB on agar plates and then inactivating them with heat, has shown a statistically significant reduction of 39% in the rate of tuberculosis among HIV-infected patients.
A special journal edition published by the University of Witwatersrand and the Palaeontological Scientific Trust (PAST) reveals groundbreaking findings on Homo habilis and its ecological pressures. The research, conducted over two decades at Olduvai Gorge in Tanzania, sheds new light on human evolution and technological development.
A new study published in The Lancet shows that nurse-centred care of HIV patients can be just as safe and effective as care delivered by doctors. The research found significant improvements in detection of tuberculosis, white blood cell count, weight, and treatment adherence.
A study by researchers at the University of Cambridge suggests that common ancestry, not hybridisation, better explains the average 1-4 per cent DNA shared between Eurasians and Neanderthals. Genetic evidence shows that Africans have almost none of the Neanderthal genome.
Babies born to obese mothers are at higher risk of complications and death, including admission to neonatal care, macrosomia, low Apgar score, and mortality. The study highlights the urgent need for research into the causes of death and strategies for educating women on maintaining a healthy weight during pregnancy.