Articles tagged with Africa
A new study reveals that Bantu-speaking communities in the Congo rainforest underwent a major population collapse from 1600 to 1400 years ago, possibly due to a prolonged disease epidemic. This finding challenges the commonly held belief of continuous settlement and affects seven present-day African countries.
A traditional Tanzanian diet rich in whole grains, fruits, and vegetables has been shown to have a beneficial effect on inflammation and immune system functioning. In contrast, an urban Western-style diet with more saturated fats and processed foods led to increased inflammatory proteins.
A new collection of genetic data helps breeders understand yam characteristics, reducing the need for trial and error. The catalog provides valuable information on physical traits, such as stem number and tuber weight, to inform breeding decisions.
Researchers have discovered a temporary bright spot in the decline of nitrogen oxides, byproducts of combustion, across the north equatorial part of Africa. The decline is linked to a decrease in dry-season fires managed land practices, as well as increasing population densities and urban emissions.
A new study in South Africa found that male clients of female sex workers contribute significantly to HIV transmission, with a rate of 6.9% over a decade. Increasing treatment among these individuals could reduce transmission by up to five times, making them a key focus for HIV prevention and treatment efforts.
A recent CABI study has updated the list of potential biopesticide active ingredients for managing fall armyworm in Africa, with 41 products now registered across 30 countries. The review highlights the efficacy of eight additional biological control agents, including Aspergillus oryzae and thyme oil.
A new study found that extreme rainfall events in East Africa led to a substantial increase in methane emissions from wetlands, accounting for over a quarter of the global annual increase. The study used satellite data and atmospheric models to evaluate methane emissions during the 2018-2019 rainfall period.
A team of researchers analyzed sediment cores from the Mediterranean Sea and combined them with Earth system models to reconstruct major environmental changes in North Africa. The study reveals that rivers were active in the region thousands of years ago, driven by slight changes in Earth's orbit and polar ice sheet variations.
The invasive Prosopis juliflora tree seriously diminishes water resources in the Afar Region of Ethiopia, consuming up to 3.1-3.3 billion m3/yr and generating US$ 320 million and US$ 470 million net benefits per year. The study highlights the need for a coordinated control program to contain its spread and reduce density.
Researchers analyzed ancient dental calculus from 41 individuals and found milk proteins in 8 individuals, dating back to 4,000-3,200 years ago. The study suggests that early African pastoralists consumed dairy products without the genetic adaptation for lactase persistence, possibly through fermentation.
A new malaria mosquito species, Anopheles stephensi, has been found in cities and towns in urban settings in Ethiopia, Sudan, and Djibouti. The invading mosquito is highly susceptible to local malaria strains, increasing the risk of urban malaria in Africa.
The Critically Endangered shorttail nurse shark has been found in Mozambique, expanding its range southward from Tanzania and westward from Madagascar. The species benefits from some degree of protection within large coastal marine protected areas but is under threat due to overexploitation by coastal fisheries.
A delayed rainy season onset can signal a higher likelihood of seasonal drought and food insecurity in regions prone to these conditions. Analysis reveals that a 10-day delay is associated with a significantly higher risk of drought in the most vulnerable areas.
A recent study by researchers at the University of Notre Dame found that large-scale land acquisitions intended to boost food security had little to no benefit, instead threatening local food security in some areas. The study analyzed satellite imagery, agricultural surveys, and household dietary datasets across four continents between...
Two giant radio galaxies have been discovered in a small patch of sky, exceeding the size of the Milky Way. The discovery was made possible by the MeerKAT International Gigahertz Tiered Extragalactic Exploration (MIGHTEE) survey, which revealed these cosmic beasts with unprecedented sensitivity.
A recent study published in Scientific Reports has uncovered evidence of the youngest known occurrence of Middle Stone Age tools, dated to around 11 thousand years ago. This discovery challenges the long-held view that these tool types were replaced by a miniaturized toolkit after 30 thousand years ago.
A new satellite-based program, GLAD, has shown promise in reducing deforestation in African nations by 18% and offering carbon sequestration benefits worth hundreds of millions of dollars. The system delivers alerts to subscribers via the interactive web application, Global Forest Watch, enabling them to take action to save forests.
Researchers found that rural girls in South Africa rely on peer, parental, and environmental factors to prevent pregnancy and HIV/AIDS, rather than modern contraceptive methods. The study highlights the need for more comprehensive education on sexual health beyond HIV/AIDS prevention.
Researchers used genomics and epidemiology to study how African Salmonella evolved to cause bloodstream infections, killing ~50,000 annually. A new antibiotic-susceptible lineage emerged in Malawi in 2016, linked to changes in antibiotic usage between 2002-2015.
A new study published in The Lancet Global Health found that cervical cancer risk is six times higher in HIV-infected women worldwide. Southern and Eastern Africa are particularly affected due to high rates of HIV and Human Papillomavirus (HPV) infections.
A global team of researchers has proposed a four-part approach to detect and contain zoonotic diseases in Africa. The strategy involves gathering information on diseases that can jump from animals to humans, testing hospital patients with fevers, analyzing blood serum in high-risk groups, and utilizing archived samples.
A study by Dr. Michael Deininger found that changes in regional precipitation over the past 10,000 years are connected and mainly caused by alterations to solar radiation and associated temperature differences between tropics and polar regions. This could lead to shifts in regional rainfall patterns, potentially causing droughts in som...
Researchers use DNA analysis to determine that all 44 tusks came from forest elephants residing in West Africa, revealing the geographic origins and habitats of these endangered species. The study provides a framework for examining vast collections of historic ivory, offering insights into modern wildlife conservation.
Researchers uncover ancient elephant migration routes and habitats through shipwrecked ivory analysis, challenging previous expectations of African elephant distribution. The study provides insights into the impact of the ivory trade on elephant populations and offers potential for tracing illicit ivory sources.
Researchers found that the island-based Guttural Toads had significantly reduced body size and hindlimb length compared to their South African counterparts. This rapid dwarfism raises questions about the evolutionary mechanisms driving this change in less than a hundred years.
Professor Swanepoel's innovative research using smartphone technologies to provide equitable access to hearing healthcare services has been recognized with the prestigious Olusegun Obasanjo Prize. His work aims to improve 'ear and hearing care' in Africa, making it a reality for every African citizen.
Researchers from Université de Genève analyzed 16 glass beads found in Mali and Senegal, discovering they were made of Egyptian, Levantine coast, and Middle Eastern glass. The study sheds light on sub-Saharan Africa's extensive trade networks with Europe and Asia during the region's early development.
The study estimates that sub-Saharan Africa requires approximately 2.5 million additional hospital beds by 2030. Countries in the region must prioritize facility expansion and new construction to address growing population needs.
The study analyzes healthcare accessibility in sub-Saharan Africa and identifies a strategy to efficiently abate inequalities. Researchers estimate that ~6,200 new facilities need to be built by 2030 to meet universal healthcare targets.
Researchers from the University of Copenhagen have analyzed satellite imagery to study vegetation trends in arid regions, finding a clear trend of declining vegetation growth in developing countries, while wealthier nations experience increased growth. This uneven impact may lead to food shortages and climate refugees.
Researchers uncovered evidence of human occupations along South Africa's eastern seaboard from 35,000 years ago to 10,000 years ago, providing insights into coastal foraging during glacial periods. The study reveals that people had access to the sea and could live near coastlines even during the Last Glacial Maximum.
International experts will discuss COVID-19's effects on the human body when combined with other health conditions, such as HIV/AIDS and tuberculosis. The panel aims to provide advice on coping with multimorbidity in high-income countries.
Researchers found that domesticated Aedes aegypti mosquitoes in Asia, Africa, and the Americas are more susceptible to acquiring Zika virus than their African counterparts. Genetic differences on chromosome 2 are believed to be the cause of this increased susceptibility.
African and German partners are developing intelligent 'microgrids' based on renewable energy to provide uninterrupted power supply for rural communities. The project aims to equip local specialists with practical knowledge, enabling autonomous use of socio-technological infrastructure.
A new study has revealed that the East African Rift System is slowly breaking away, with Madagascar splitting into pieces. The research, led by D. Sarah Stamps of Virginia Tech, found that the break-up process is more complex and distributed than previously thought.
A multifaceted public health strategy combining contact tracing, community-based screening with isolation and quarantine centers can substantially reduce COVID-19 cases in low-and-middle-income countries. The study found that this approach could save lives even where budgets are constrained.
Researchers estimate 4.3% of Kenyans had antibodies to SARS-CoV-2 by June 2020, revealing more extensive exposure than reported case-based surveillance indicates. The findings support the idea that disease may be attenuated in Africa due to Kenya's demographic characteristics.
The discovery of a new fossil specimen at Drimolen cave system reveals subtle anatomical changes in Paranthropus robustus, challenging the long-held assumption that males were larger than females. The findings suggest that environmental conditions drove rapid evolutionary changes in the species.
Researchers warn that extreme events like the 'Day Zero' drought could become common by the end of the century due to climate change. The study used high-resolution simulations to conclude that human-caused climate change made the drought five to six times more likely, and such events could impact regions with similar climates.
The discovery of Ajnabia odysseus in Morocco suggests that dinosaurs crossed hundreds of kilometers of open water to colonize Africa. The tiny duckbill was likely a powerful swimmer, with large tails and powerful legs, and may have simply swum the distance.
Scientists have uncovered a 5-million-year-old relative of the living honey badger, Mellivora capensis, from the early Pliocene locality of Langebaanweg in South Africa. The fossil discovery provides insight into the evolution and diversity of mustelids during this time period.
Research in rural South Africa identifies socio-economic factors as key drivers of overweight and obesity among mothers. The study found that decision-making authority, income level, and family size significantly affect women's health, highlighting the need for evidence-based policies to tackle the region's obesity epidemic.
A new study warns that massive African reforestation efforts could harm ecosystems, as the biomes are divided into distinct types with unique tree species. The researchers analyzed 753 sites in both environments, finding that rainfall, seasonality, and temperature are key environmental factors.
The study identified over 3 million novel variants in African genomes, showcasing the continent's vast genetic diversity. It also revealed complex patterns of ancestral mixing and natural selection, shedding light on population history, environmental adaptation, and disease susceptibility.
A meta-analysis of preventive malaria treatments among school-age children found that treatment cuts malaria prevalence by 46% and subsequent cases by 50%. Preventive treatment also improves learning outcomes and reduces anaemia cases.
The study found that modern humans settled along the Mediterranean coast before expanding into the Sinai desert and eastern Jordanian Rift Valley. Favorable environmental conditions, including a freshwater lake known as Lake Lisan, enabled human settlement and spread throughout the region.
A study published in PLOS ONE found that about 1/3 of young women in 43 LMIC have lost at least one sibling before the age of 25. Sibling loss was relatively more common in countries affected by conflict and war, while bereaved respondents in many studied countries still had a comparable number of remaining living siblings.
Researchers in Lesotho and Switzerland found that combining home visits with HIV self-tests increased test coverage among villagers, particularly young people. The strategy resulted in a 20% higher HIV test rate compared to traditional campaigns.
Researchers from KAUST analyzed fonio millet genomes to identify genes that could lead to higher yields and larger grains. The study found two genes, DeGs5-3A and DeSh1-9A, which were artificially selected for their larger grain size.
Key findings from TropMed20 include new research on climate-related health impacts, such as increased tick bites and fetal health risks. The conference also addresses racism in tropical medicine and explores the potential of monoclonal antibodies to combat diseases like COVID-19 and malaria.
The FoodLAND project is developing innovations for local agriculture and aquaculture development in six African countries, aiming to strengthen agro-biodiversity and healthy diets. The project will create a network of 14 local Food Hubs to mobilise actors in rural and urban communities, testing and introducing technological innovations.
Researchers have identified key genetic markers associated with heat and drought tolerance, inflammation resistance, and tick control in African cattle. The study reveals how Asian cattle breeds influenced the development of indigenous breeds through genetic 'time travel', enabling them to thrive across Africa.
Researchers at Technical University of Denmark have isolated new strains of lactic acid bacteria that can increase the safety of fermented camel milk products. The bacteria can kill off disease-causing microorganisms such as E.coli and salmonella, making the milk safer for consumption.
The study predicts the Asian giant hornet's potential spread in the US, including down the west coast, and globally to parts of Africa, Europe, Australia, and South America. Suitable habitats include regions with warm summers, mild winters, and high rainfall.
A recent study found a significant increase in the trading of species such as green monkeys and warthogs to protect crops, despite religious taboos. The research suggests that urban demand is not driving the wildmeat trade, but rather limited access to alternative protein sources and crop-protection incentives.
Experts will discuss the challenges of mental health in times of pandemic, including social isolation and uncertainty. The virtual panel discussion aims to provide insights into the effects of protective policy measures on human mental health.
A new study reveals that dust played a critical role in forming thick soils in the Levant region, enabling early human civilization to take root. The discovery challenges existing hypotheses on soil formation, suggesting that dust input was more important than erosion rates.
A study suggests that urban mosquito species Anopheles stephensi could spread to dozens of cities across Africa, putting millions at higher risk of contracting malaria. The authors used location data and spatial models to predict the spread of this Asian mosquito species in Africa, identifying 44 highly suitable locations.
Critics argue that male circumcision campaigns in Africa are not based on robust science but on racist assumptions about culture, health, and sexuality. The campaigns have been carried out without sufficient contextual research and with underrepresentation of African voices.
A new paper published in Science Advances confirms Latin America is twice as rich in plant species as tropical Africa, with a third of the world's biodiversity. The study provides essential baseline data for conservation efforts, focusing on areas with the greatest biodiversity.