Researchers estimated virus evolution using genetic sequences and found that SIV lineages giving rise to HIV-1 and HIV-2 date back to the 18th century. This finding challenges previous estimates of millions of years of coevolution between SIVs and their primate hosts.
A literature review suggests that global health initiatives and agencies claim to support health system strengthening but often fail to deliver. The study examines the claims made by major global health actors, such as WHO and UNAIDS, and finds a gap between their language and actual activities.
The Millennium Development Goals are failing to address high under-five child mortality amongst the country's most vulnerable groups. The goal of reducing average under-5 mortality by two-thirds by 2015 may be achieved, but inequity will persist if resources are allocated solely based on averages
Research in PLOS ONE identifies early interactions between vision and language domains during reading, with the speech motor areas active simultaneously as words are processed. This finding has potential clinical applications for individuals with developmental dyslexia and acquired reading disabilities.
New research reveals that DNA repair enzyme TDG plays a crucial role in the effectiveness of cancer drug 5-Fluorouracil. By incorporating itself into DNA, 5FU creates an overload on the repair system, leading to cell death. This finding provides a new understanding of how 5FU kills cancer cells.
The journal's new evidence-based approach prioritizes the impact of diseases and risk factors that cause significant years lost to healthy life worldwide. It also emphasizes the importance of considering social, environmental, and political determinants of health alongside biological causes.
Researchers have determined key structural features of the mimivirus, a giant virus large enough to be seen with a light microscope. The findings reveal a starfish-shaped structure that covers a special vertex where the genetic material leaves the virus to infect its host.
A comprehensive study estimates that smoking and high blood pressure cause nearly half of the US adults' preventable deaths. The analysis highlights the potential for targeted interventions to reduce these deadly risk factors.
A study in Zanzibar found that rapid malaria tests reduced prescriptions of antimalarial drugs and increased treatment for non-malarial causes, while also lowering reattendance rates due to perceived lack of cure. The results suggest improved health outcomes with routine use of these tests.
Scientists discover that quinoline compounds inhibit S100A9's pro-inflammatory effects on white blood cells involved in immune regulation. This new mechanism may provide insights into the early stages of autoimmune disease development.
In Ethiopia, the scale-up of antiretroviral treatment has achieved remarkable success in expanding access to treatment and HIV counseling and testing. However, HIV prevention interventions and managing chronic care patients are lagging behind. Task shifting to health officers and workers is credited with these successes, but urgent att...
Research published in PLOS Medicine found that mortality among HIV-infected people starting antiretroviral treatment (ART) is comparable to non-HIV related mortality in four sub-Saharan countries. The study analyzed data from over 2 million people with HIV and found moderate excess mortality, similar to that associated with diabetes.
A subset of immune cells has been found to contribute to the development of severe malaria by suppressing the immune system and allowing parasites to grow uncontrollably. This discovery could lead to new drug targets and immunotherapies against malaria, as well as insights into other inflammatory diseases.
A study published in PLOS ONE found that people are more attracted to rare species, leading to longer download times and increased attempts to access them. This perceived value of rarity poses a threat to conservation efforts, particularly in the context of ecotourism and exotic pet trade.
Researchers warn that unregulated biofuel crop planting poses a significant threat to Hawaii's environment due to their high invasiveness. The study identifies high-risk biofuel crops that could be grown with implemented measures to reduce their risk of spreading out of control.
A study in PLOS Biology found that the intermediate hippocampus plays a critical role in translating rapid place learning into behavior. The researchers used a water maze experiment to test rats and found that disabling a specific region of the hippocampus impaired their ability to return to a platform.
A new study published in PLOS Neglected Tropical Diseases highlights the debilitating effects of filarial hydrocele on marriage and sex. Hydrocele, a chronic manifestation of filariasis, causes swelling in the scrotum, leading to pain during intercourse and emotional distress.
Researchers confirm the existence of three separate Neanderthal sub-groups in Western Europe, southern Europe, and the Levant, with a fourth group found in western Asia. The study suggests that climate conditions played a significant role in shaping the population's geographical distribution.
Researchers analyzed genetic data and found a high frequency of inbreeding among Habsburg rulers, leading to a significant increase in health problems and infant mortality. The study suggests that inbreeding was a major factor in the decline and eventual extinction of the Spanish Habsburg dynasty.
Resistance to the antimalarial drug sulfadoxine has emerged independently in multiple sites across Africa over the past decade. The study suggests that coordinated control campaigns may be more effective in reducing the African malaria burden by addressing regional differences in parasite strains and levels of resistance.
A study in Evolution Canyon, Israel, shows that scorpion species exhibit different distributions on the south-facing and north-facing slopes, despite identical regional geology. The results suggest that environmental pressures, such as sunlight and drought, can lead to local changes in biodiversity.
The study reveals that African Pygmies and their farmer neighbors diverged approximately 60,000 years ago. Genetic analysis indicates a common origin for all Pygmy populations, with distinct physical traits possibly inherited from a shared ancestor.
A new statistical method estimates the source location and geographic extent of an aerosolized anthrax release based on early cases and weather information. This enables public health decision makers to identify people at risk and treat them promptly to save lives.
A new study by Duke University researchers found that rainforest reserves provide an effective buffer against fires in the Brazilian Amazon. Despite the presence of roads and settlements, reserves still experience fewer fires than surrounding areas. The study suggests that even inhabited reserves can be effective tools for reducing fires.
Researchers found that females copulate more frequently with males who share meat with them, compared to those who never share. This suggests that sharing meat with females improves males' mating success and may be a long-term strategy for securing mates.
Research found that eagle owls utilize vocal displays during dawn and dusk to convey visual signals, with a white throat badge providing better contrast in low light conditions. This challenges the assumption that diurnal species are the primary users of visual signalling.
A new standardized tool for assessing chronic pain has been developed and validated to differentiate between peripheral neuropathic pain and non-neuropathic low back pain. The tool, called STEP, takes just 10-15 minutes to administer and has been shown to have high diagnostic accuracy.
Late-acting insecticides targeting older mosquitoes show potential to reduce malaria transmission by 95% and slow down resistance. The approach could lead to evolution-proof insecticides that never become obsolete.
In a study published in PLOS ONE, ants were observed to establish new one-way systems when faced with obstacles. Despite initial hesitation, the ants eventually learned to use light direction to follow the new trails and successfully forage for months. This adaptation demonstrates the complex problem-solving abilities of ants.
Researchers successfully retrieve DNA from ancient macrofossils up to 26,000 years old and dried museum beetle specimens up to 188 years old using a non-destructive DNA extraction method. This breakthrough has significant implications for population genetic studies and reconstruction of ancient biodiversity.
A study published in PLoS ONE found that people perceive a healthy appearance when looking at faces with more oxygen-rich blood and less pale undertones. Physically fit individuals tend to have healthier-looking skin due to increased blood vessels and higher oxygen levels.
Research found that parasitic infection reduces immunity to future cholera infections and compromises vaccine effectiveness. Helminth-infected patients had lower IgA antibodies, indicating a weakened immune system.
A novel framework reconstructs neural networks with high-throughput tools, accelerating brain mapping and enabling global collaboration. The technology enables the creation of terabyte-scale volumes and gigabyte-scale mosaics, providing a blueprint for healthy neural tissues.
Researchers have successfully interrupted the transmission of river blindness in Escuintla, Guatemala, one of the largest endemic areas in the Western Hemisphere. This achievement marks an important victory in the campaign to eliminate the devastating disease, with eight out of 13 endemic study areas having already ended transmission.
A new study published in PLOS Computational Biology found that the most useful information for face recognition comes from eye images, which provide the least 'noisy' result. The study analyzed over 800 male and female face images to understand why our brains prefer a coarse resolution for face recognition.
A recent study published in PLOS Pathogens has revealed that a majority of the global population has been infected with three recently discovered human polyomaviruses, including KIV, WU, and MCV. The study, which tested over 2,200 anonymous donor blood samples, found that infection with these viruses occurs early in childhood.
International experts propose MEDQUARG guidelines to study counterfeit and poor-quality medicines globally. The guidelines aim to improve the effectiveness of treatment policies by providing a standard for medicine quality surveys.
Researchers found ALDH2-deficiency linked to increased esophageal cancer risk from moderate alcohol consumption. Clinicians can identify deficiency through flushing response and counsel patients to reduce drinking.
The study provides a comprehensive map of global malaria endemicity, revealing areas where malaria control can be improved and areas where elimination may be possible. The map uses model-based geostatistics to incorporate data from local surveys, providing an important resource for policymakers and researchers.
The human brain operates in a self-organized critical state, characterized by optimal memory and information-processing capacity. Researchers used brain imaging techniques to measure synchronization between brain regions, finding dynamic changes consistent with critical dynamics.
Research led by Dr. Cédric Feschotte found a retrovirus related to HIV integrated into lemur genomes around 4.2 million years ago. This discovery provides insights into the evolution of lentiviruses and raises the possibility that HIV-like viruses are still circulating in Madagascar.
Researchers identified a novel pathway contributing to severe malaria's high mortality in sub-Saharan African children. Disrupted endothelium causes ultra-large von Willebrand factor release, leading to ADAMTS13 inhibition. This study sheds new light on the interaction between malaria parasites and their human host.
Researchers have identified three genes - VKORC1, CYP2C9, and CYP4F2 - responsible for over 40% of warfarin dose variability. The study provides a comprehensive overview of the genetic landscape influencing dose variability, paving the way for more accurate warfarin dosing and reduced patient risk.
A new study published in PLOS ONE found that the adult-to-young ratio plays a critical role in the social development of horses. The research revealed that groups with low adult-to-young ratios had younger horses exhibiting more aggression and forming tighter bonds with each other, potentially reducing their interaction with adults.
Two patients in Hanoi died from laboratory-confirmed rabies after consuming butchered dog or cat meat. The researchers caution that handling unvaccinated animals poses a significant risk for rabies transmission in endemic areas.
A new paper suggests that four specific processes occur only in conscious perception tasks, offering a unique insight into the neural correlates of consciousness. By studying brain activity of patients with epilepsy, researchers isolated four converging electrophysiological markers characterizing conscious access after word perception.
Researchers used guinea pigs to test air disinfection methods, finding that UV lights and negative ionizers reduced TB transmission. The study showed a significant decrease in TB infection rates when UV lights and fans were used to ventilate patient room air.
A study found that iron homeostasis is disrupted in prion disease-affected brains, leading to a vicious cycle of increased iron uptake. The misfolded protein PrP-scrapie causes this imbalance by altering cellular iron metabolism, paving the way for novel therapeutic strategies.
Researchers discover that fruit fly embryos can 'forget' incorrect body plans and develop into recognizable adult flies through cross-regulation among gap genes. This process, known as canalization, allows for robust development despite variable conditions, shedding light on the mechanisms of genetic interactions.
A study published in PLoS Medicine found that children of older fathers tend to perform poorly in intelligence tests during infancy and early childhood. In contrast, the same children who have older mothers exhibit better cognitive skills. The researchers suggest genetic and social factors as possible explanations for this association.