Articles tagged with Africa
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Researchers conclude that sexual transmission remains the primary mode of HIV-1 spread in Africa. The authors also acknowledge the need for improved data to identify risks associated with unsafe injections in healthcare settings.
A review article by Daniel B. Di Giulio and Paul B. Eckburg reports the first confirmed cases of monkeypox in the US, likely introduced through the pet trade and rodent importation. The disease has been mild in the US, with no fatalities, but poses a risk of endemicity in US rodent populations.
The Université de Montréal has received a $11.7 million grant from the Bill & Melinda Gates Foundation to develop advanced training programs, policy research leadership centers, and specialist networks for reproductive health in French-speaking sub-Saharan Africa.
Researchers alter a single gene in fruit flies to adapt them to different environments, resulting in distinct pheromones that influence mating behavior. The change leads to potential sexual isolation, a crucial step in the emergence of a new species.
A new method for estimating true HIV/AIDS incidence has been proposed using population surveys, which may provide more accurate results than conventional estimates. The study found that HIV-1 prevalence was around 25% higher according to conventional UNAIDS/WHO estimates than data obtained from population surveys.
A new discovery of fossil mammals in Ethiopia's highlands sheds light on the evolution of African mammals during a long-standing gap in scientists' understanding. The findings, reported in Nature, show that mammals continued to evolve and produce new species on the isolated continent of Afro-Arabia.
The Lancet editorial proposes a serostatus-based approach for universal voluntary knowledge of HIV status, simplified clinical testing, and prevention of discrimination. Two viewpoints discuss the necessity of testing before prophylaxis with single-dose nevirapine in preventing mother-to-child transmission.
Researchers from WCS successfully tag seven great white sharks using a novel technique, resulting in valuable data on their movements and behavior. The sharks spend only three to seven minutes out of the water, showing minimal trauma, and one shark traveled over 2,000 miles before being tracked again.
The Schistosomiasis Control Initiative will support Burkina Faso, Mali, Niger, Zambia and Tanzania in treating 15 million people with praziquantel and albendazole over four years. The initiative aims to deliver treatment to 3 million children and reduce the parasite's impact on African communities.
Researchers developed a genetic test to distinguish African elephant tusks from different parts of Africa, with 80-95% accuracy. This test can help law enforcers pinpoint where poaching is heaviest, increasing ivory seizure rates and deterring poachers.
A symposium explores how climate change influenced brain development, tool use, and migration patterns of early humans. Leading scientists discuss the impact of glacial periods on human populations, with findings suggesting that water availability played a critical role in shaping human evolution.
The study reveals a significant lack of data on neonatal mortality in Sub-Saharan Africa, resulting in a highly variable rate. Researchers highlight the need for investments in neonatal research and health programs to address this critical public health issue.
A recent study by Alessandra Giannini confirms a strong link between sea surface temperatures and precipitation in Africa's Sahel region. The research finds that Indian Ocean temperatures are the primary driver of precipitation in the area, with implications for climate prediction and seasonal predictions.
The agreement creates a transboundary protected area combining the Takamanda-Okwangwo complex in Cameroon and Nigeria. The plan aims to conserve gorillas and their habitat through measures such as revised land-use practices, corridor establishment, and increased protection.
Dalton's study reveals farmers value plant height, days to maturity, and processing characteristics over yield increase. He used a hedonic model to derive economic values of crop traits, aiding breeders in creating technology.
Researchers have developed a DNA-based test to accurately distinguish great white sharks from other species, even when only dried fins or meat are available. This new test will help conservationists and fisheries managers better regulate and protect great whites, a species that has declined by up to 79% in the northwestern Atlantic.
Research finds African dust particles act as kernels for precipitation in low clouds, but suppress rainfall in high clouds. The study also suggests a link between increased dust levels and drought conditions.
The Lancet appoints Dr. Tobias to a $15 billion programme tackling AIDS in African and Caribbean countries most devastated by the pandemic. Critics argue that his lack of knowledge about Africa and connections to the pharmaceutical industry may compromise his credibility.
India's HIV prevalence rate is less than 1 percent, but a looming pandemic on the horizon due to shifting demographics and changing cultural values. The researchers recommend targeted prevention programs for high-risk groups, such as prostitutes and men who have sex with men, and offer circumcision as an additional avenue of prevention.
The discovery of Homo sapiens idaltu fossilized skulls in Ethiopia confirms modern humans originated in Africa and predate Middle Eastern remains by 30,000 years. The ancient predecessor's diet included hippopotamus, with stone tool marks suggesting early mortuary practices and possible scavenging.
Fossilized skulls from Ethiopia's Afar region date back to 160,000 years, showcasing the earliest known fossils of modern humans. The discovery fills a major gap in the human fossil record and supports the theory that modern humans evolved in Africa.
Researchers Barany and Hammett found that forests and non-timber forest products are crucial for household coping strategies, offering low-cost alternatives to meet nutritional needs. Medicinal plants from these resources can treat conditions related to HIV/AIDS, making them a vital priority for conservation and management efforts.
A new study reveals that modern humans originated from a small ancestral population in sub-Saharan Africa, with genetic splits occurring between hunter-gatherer populations and African farming people around 70,000-140,000 years ago. This finding supports the 'out-of-Africa' theory and provides insights into human migration patterns.
Researchers at Purdue University have determined the age of a fossilized skeleton found in South Africa to be approximately 4 million years old. This finding could mean that hominids such as Australopithecus were present in southern Africa earlier than previously thought.
The Succulent Karoo, a biodiversity hotspot with high plant diversity and unique species, is receiving $8 million in grants to combat declining biodiversity. The initiative aims to empower local communities and organizations to take action in conservation efforts.
A recent study warns of a dramatic decline in western equatorial Africa's great ape populations, with gorillas and chimpanzees facing nearly 60% decline since 1983. The research highlights the urgent need for aggressive investments in Ebola prevention, law enforcement, and protected area management to ensure their survival.
Fossil teeth from Egypt's Fayum desert have provided evidence of the earliest known ancestors of bushbabies and lorises, dating back to the Eocene epoch. The finds confirm earlier genetic studies suggesting that these primates diverged much earlier than previously thought.
Newly discovered primate fossils in Egypt double the known age of bushbabies and lorises, suggesting they may have originated in Indo-Madagascar instead of Africa. This finding pushes back the divergence times and origins of primates, including human ancestors, to around 90 million years ago.
The URI Oceanography team is conducting a two-year research expedition off the coast of Africa to investigate horizontal ocean mixing. The deployment of 92 subsurface RAFOS floats will help scientists understand eddy stirring and mixing in this poorly understood region.
A team of researchers found a unique population of chimpanzees in the Goualougo Triangle that have had minimal or no contact with humans. The primates displayed curious behavior when encountered, but showed no signs of fear or aggression, suggesting they had not formed negative associations with human presence.
A study conducted in Tanzania found that poorer families are less likely to seek medical care for their children, resulting in a higher prevalence of childhood illnesses and lower treatment rates. The findings highlight the need for targeted health programs to address health inequities in low-income communities.
The US has pledged $1 billion to combat HIV/AIDS in 14 high-prevalence countries. The programme aims to prevent 7 million new infections, treat 2 million people, and support 10 million infected individuals.
A new study published in Nature reveals that all of Madagascar's living Carnivora descended from a single species that dispersed from Africa to the island. The findings refute two previously accepted models for mammal colonization and provide further evidence that lemurs also colonized the island in a single event.
The World Legacy Awards honor three tourism projects for their exceptional balance between nature conservation, heritage protection, and social responsibility. Wilderness Safaris in South Africa, ATG Oxford in Italy, and the REST Project in Thailand were recognized for their contributions to sustainable tourism.
A recent study found a mean warming trend of 0.15 degrees Celsius per decade in East Africa from 1970 to 1998, challenging previous research on malaria's relationship with climate change. The analysis highlights the need for better local monitoring and collaboration between researchers from different fields to assess health implication...
Researchers from Case Western Reserve University found a dramatic reduction in mosquito transmission, new infections, and severe disease manifestations with four annual mass treatments. The study provides essential guidelines for controlling the infectious disease and points to the ultimate eradication of filariasis on a global level.
A NASA study analyzed satellite data from 1997-2000 and found that the transition from El Nino to La Nina reversed rainfall patterns in Africa, affecting vegetation greenness. This reversal has implications for agriculture, livestock farming, and vector-borne disease outbreaks.
The new CIPRA grant will address HIV/AIDS as a family issue, not just an individual problem. The research aims to develop practical techniques tailored to the needs of South African families, with a focus on prevention, treatment, and social support services for those living with HIV/AIDS.
Sexual violence is rooted in gender power inequalities and hierarchical relationships, with prevention efforts extending to health services, education, and social policies. Health professionals play a crucial role in supporting victims and promoting autonomy, bodily integrity, and self-esteem.
A new study reveals three distinct species of African elephants: savanna, forest, and west African. The west African population has been diverging for over two million years and is threatened with extinction due to human activities.
The western chimpanzee is critically endangered with only 4% of its original population remaining. Conservation efforts are underway to address threats such as agricultural development, logging, and the bush meat trade. The action plan provides a roadmap for halting or reversing the decline in chimpanzee numbers in West Africa.
A Global Development Organisation is necessary to overcome barriers to global development, including fragmentation, strategic incoherence, and resource overconsumption. The organisation would aim to set standards for best practice, avoid duplication of work, and hold institutions accountable for their impact on development.
A Canadian-led team will excavate the Strongholds of Cameroon, a group of ancient stone-built structures in northern Cameroon. The four-month project aims to uncover information on how to excavate the larger sites without jeopardizing their structural integrity.
A Franco-Senegalese research team has demonstrated the efficacy of antiretroviral therapy in Africa, contrary to previous doubts. The 18-month pilot scheme showed strong adherence and high patient respect for prescriptions, with improved treatment outcomes.
A new study reveals a small-brained Homo erectus individual from Georgia, raising questions about the role of brain size in human migration. The discovery, part of a rich fossil collection, suggests that other factors may have contributed to the ancestors' exit from Africa.
The African HIV-1/AIDS epidemic is reaching catastrophic levels, with significant implications for the region's healthcare infrastructure. Co-existing sexually transmitted diseases (STDs), malaria, and tuberculosis further complicate the situation, highlighting the need for comprehensive interventions to mitigate these consequences.
Researchers aim to better understand West Africa's climate trends and model potential impacts on the region's water resources, agriculture, and energy sector. The study's findings could help inform regional plans for adapting to climate change and ensure the long-term sustainability of hydroelectric power.
A study assessing existing data on HIV/AIDS interventions found that cost-effectiveness varies greatly between interventions. Some interventions, such as selective blood safety measures and targeted condom distribution, can prevent a case of HIV/AIDS for under $11 and gain over $1 in disability-adjusted life-years (DALYs) per dollar spent
In southern Africa, measles elimination strategies reduced reported clinical cases from 60,000 to 117 cases between 1996 and 2000. With overall vaccination coverage of 91%, continued national commitment is crucial for implementation and maintenance of proven strategies.
A UMass anthropologist has investigated the dental development of an extinct primate species, revealing that these early primates developed teeth rapidly to adapt to their environment. The study found that these ancient lemurs had highly developed teeth by birth, allowing them to survive on solid food shortly after birth.
The South African government is under pressure to implement a national program against vertical transmission of HIV from mothers to children. Key researchers are calling for increased investment in antiretroviral treatment and support to improve public health outcomes.
A new million-year-old skull found in Ethiopia contradicts recent suggestions of a split in the homolineage between Eurasiatic and African populations. The team's detailed analysis shows genetic continuity between populations, indicating movement and mobility between them, consistent with a single species Homo erectus.
A new fossil discovery in Ethiopia indicates that Homo erectus was a single, widespread species, rather than two separate ones. The 1 million-year-old fossil found in the Middle Awash region of Ethiopia is similar to other Homo erectus fossils from Asia and Africa.
Researchers have found that innovative soil fertility replenishment programs can increase crop yields by two- to four-fold, providing strong evidence for their effectiveness. The programs use natural resources available in Africa, such as trees and rocks, to replenish nutrients depleted from the soil.
Researchers found clean-air slots with pristine air, sandwiched between polluted layers in southern Africa. These 'clean-air slots' can persist for days on end over thousands of square miles.
Scientists have discovered two significant fossil finds in Europe, shedding light on the early evolution of humans. The oldest relative of all living great apes was found in Germany, while a nearly complete skull of Dryopithecus was uncovered in Hungary.
Dinosaur expert Paul C. Sereno has made groundbreaking discoveries in Africa, including the giant predator Carcharodontosaurus and the spinosaur Suchomimus. His research is transforming our understanding of dinosaur evolution, shedding light on their diversity and abundance during the Cretaceous period.
Researchers mapped areas of Africa at risk for RVF outbreaks, identifying conditions necessary for breeding mosquitoes that transmit the virus. Satellite data also suggested a link between dry to wet changes in tropical regions and Ebola outbreaks.
A national survey in South Africa found that 33% of reported child rapes were perpetrated by school teachers, with 85% occurring among children aged 10-14. The study highlights the need for effective action to address rape and sexual harassment of girls in schools.
The study resolves placental mammals into four major groups, revealing a common ancestor in Gondwana. Afrotheria is the oldest group, with some orders never leaving Africa, and Xenartha populations South America.