Articles tagged with Mosquitos
A new study by Yale University finds that garlic's diallyl disulfide compound blocks mating in mosquitoes and flies, including species that spread diseases. The finding could lead to environmentally friendly and inexpensive pest control methods.
Researchers developed a mechanical prototype to demonstrate their bio-inspired sensor's ability to enhance vibration signals without amplification circuits or signal processing. The design aims to benefit acoustic and vibration sensors that need to detect very weak signals, such as microphones or biomedical sensors.
Dr. James Earnest's research focuses on how the immune system responds to mosquito-borne viruses, aiming to create better preventative measures for dengue and Zika infections. He is collaborating with institutions in Mexico and Uganda to study immune responses over time, shedding light on effective memory B cells and antibodies.
A new study by Harvard T.H. Chan School of Public Health found that Anopheles darlingi mosquitoes are evolving to evade insecticides, threatening malaria control efforts in South America. The study sequenced complete genomes of over 1,000 mosquitoes across six countries and identified resistance-related genes.
Researchers discovered that N6-methyladenosine (m6A) epigenetic modifications in mosquito-borne flaviviruses enhance viral propagation in vertebrates, increasing transmission from animals to mosquitoes. The study found a host-dependent regulatory mechanism involving the stem-loop I structure and the protein G3BP1.
Scientists have discovered that mosquitoes use a specific sensory receptor to detect and avoid borneol, an organic compound found in plant-based mosquito repellents. This finding has the potential to lead to the development of more effective and longer-lasting repellents.
Researchers found that environmental and biological factors significantly impact mosquito sound variability between species and individuals. Controlling for these variations is crucial to improve AI-based acoustic classification accuracy.
The preference for feeding on humans among certain mosquito species evolved around 1.8 million years ago in response to the arrival of early hominins in Southeast Asia. This finding provides independent evidence supporting the limited fossil record of early hominin arrival in the region.
Researchers have identified a unique protein named Aurora-related kinase 1 (ARK1) essential for the malaria parasite's survival and transmission. Turning off ARK1 in the lab causes replication to fail, preventing disease progression and transmission.
Researchers have identified the specific smell receptor that causes mosquitoes to avoid borneol, a natural compound found in camphor tree oils. Activating this receptor triggers a neural pathway leading to avoidance behavior, offering potential strategies for designing more targeted and effective mosquito repellents.
A recent study found that chikungunya can spread in temperatures as low as 13 degrees Celsius, posing a greater health threat in Europe than previously thought. The Asian tiger mosquito is expanding northwards through the continent, and warming temperatures may lead to local outbreaks in the UK.
A new study found avian malaria at 63 of 64 sites tested statewide, including areas with diverse bird communities. This suggests that many different bird species in Hawaiʻi—both native and non-native—are capable of infecting southern house mosquitoes, the primary vector of avian malaria.
Scientists found that mosquitoes in the Atlantic Forest prefer feeding on humans due to convenience as biodiversity dwindles. This preference increases the risk of pathogen transmission and highlights the need for targeted surveillance and prevention actions.
A study by University of Florida researchers found that mosquitoes fed on 86 different species of animals, capturing nearly all the vertebrate biodiversity in a small area in central Florida. This innovative method uses mosquitoes to monitor other animals and conserve them.
Researchers developed a genetic method to produce dark males and pale females, making it easier to sort sex in mosquito control. The approach uses CRISPR gene editing to create an engineered sex-linked trait that enables fast and accurate sex separation without complex equipment.
A new study from the University of Copenhagen predicts that climate change could create more favorable conditions for malaria mosquitoes, exposing millions to increased risk of infection. The researchers warn that if left unchecked, this could put between 200 million and up to 1 billion people at additional risk.
Researchers at Columbia University found that mosquitoes are more persistent in their response to humans at dawn and dusk due to their internal clocks. By mutating a gene that controls these clocks, scientists can alter the behavior of mosquitoes to reduce biting rates.
Researchers have created a model that can handle complex mosquito behavior and its impact on human diseases. The study reveals surprising findings, such as it may be better to let a mosquito bite you in terms of overall transmission.
The Aedes aegypti Mosquito Cell Atlas provides comprehensive cellular-level resolution of gene expression in every tissue, from antennae to legs. This atlas has yielded new insights into the genetic secrets of Aedes aegypti, including novel cell types and subtle differences between male and female mosquitoes.
Researchers have discovered detailed visualizations of mosquito's carbon dioxide-detecting neurons, revealing anatomical adaptations designed to target human blood. The study provides key insights into the mosquito's sensing mechanisms and their unique ability to detect CO2, which contributes to their deadly status.
A study by Rockefeller University researchers reveals that female mosquitoes dictate mating success with a physical movement of their genitalia. This behavior, which occurs in both Aedes aegypti and Aedes albopictus species, is critical for successful mating, making the role of females more active than previously thought.
Research in the Amazon reveals that regions with intermediate forest degradation are more prone to malaria transmission due to increased contact between mosquitoes and humans. The study emphasizes the need for targeted interventions integrating vector control with forest conservation.
Researchers engineered a new strain of Metarhizium fungus that mimics flower scents to attract and kill mosquitoes. The floral-scented fungus is harmless to humans and breaks down naturally, making it a promising alternative to chemical pesticides.
Researchers from Princeton University uncover the origins of the human-biting mosquito Culex pipiens molestus, dating it back over 1,000 years to ancient agricultural societies in Egypt. The study reveals genetic links between bird-biting and human-biting mosquitoes, crucial for understanding West Nile virus transmission.
New research has revealed that the 'London Underground mosquito' evolved over 1,000 years ago in Ancient Egypt, contradicting a long-held theory of its emergence in northern Europe. The study's findings suggest that hybridisation between human-biting and bird-biting mosquitoes may contribute to West Nile virus transmission.
Researchers track expansion of disease-carrying mosquitoes and their hybrids in North America, particularly in Utah. Climate change and land use changes enable mosquitoes to thrive in new areas, spreading West Nile Virus and other mosquito-borne illnesses.
A*STAR researchers discovered that mosquito saliva not only transmits the virus but also influences how the body's immune system responds to chikungunya infection. Sialokinin, a bioactive peptide in Aedes mosquito saliva, binds to neurokinin receptors on immune cells and suppresses monocyte activation.
Aedes aegypti and Aedes albopictus mosquitoes have been detected in the UK, posing a public health risk due to their role as vectors of diseases such as dengue and chikungunya. The detection highlights the importance of ongoing surveillance to reduce the risk of mosquito-borne diseases.
Despite an increase in US cases, worry about West Nile virus remains low, with only 15% of respondents concerned about contracting the disease. The vast majority know the best defense is preventing mosquito bites and controlling mosquitoes around their homes.
Climate change is allowing disease-carrying insects to spread into new areas, resulting in a growing number of West Nile virus infection cases in Europe. The virus can attack the nervous system and brain, causing symptoms like fever, headache, and malaise, with severe consequences for vulnerable individuals.
A new study predicts significant increase in mosquito-borne disease risk in Brazil by 2080, with higher temperatures and changing rainfall patterns contributing to the issue. Climate action could help mitigate this risk, reducing future disease outbreaks.
Researchers conducted a survey of published studies on the transmission risk of 39 pathogens and diseases, finding that only 7.4% consider hazard, exposure, and vulnerability. The study recommends integrating these components for reliable models and guiding public policies.
Researchers have created a statistical model using 20 years' worth of sentinel chicken data to predict elevated West Nile virus activity up to six months in advance. This breakthrough could lead to proactive preventative measures and improve disease outbreak response.
A new class of insecticide, called spatial emanators, provides protection for up to a year against mosquitoes that spread malaria, as well as dengue, West Nile, yellow fever, and Zika. The breakthrough offers lasting protection in areas where malaria is prevalent and can be used day and night without heating or electricity.
Europe is experiencing longer and more intense transmission seasons for mosquito-borne diseases, including West Nile virus infection and chikungunya virus disease. ECDC has warned that record-breaking outbreaks point to a 'new normal' in Europe, prompting the need for a robust response to protect public health.
A study predicts that climate change will spread Dengue fever through Western Europe as the Asian tiger mosquito's habitat expands. Major cities like London and Paris are expected to become suitable for the mosquito, posing a significant threat to public health.
Nitisinone, a drug used to treat rare genetic disorders, has been shown to be mosquitocidal to several mosquito species, including those that transmit malaria and Zika viruses. The research demonstrates that the drug can kill mosquitoes through ingestion and surface contact, making it a potential tool in combating insecticide resistance.
Researchers developed a CRISPR-based gene-editing system that changes a single molecule within mosquitoes, halting malaria-parasite transmission. The new system is designed to genetically spread the malaria resistance trait until entire populations of the insects no longer transfer the disease-causing parasites.
Eastern equine encephalitis virus (EEEV) is a rare but deadly disease in the US, caused by a mosquito bite. People at risk include those living near swamps or marshes and outdoor workers, such as farmers and campers.
Researchers found that bacterial isolates from Crete can kill mosquito larvae within 24 hours of exposure, providing a potential biopesticide solution. The bacteria's metabolites degrade quickly and don't accumulate in the environment, making them a promising alternative to chemical insecticides.
The European Centre for Disease Prevention and Control (ECDC) has launched new weekly surveillance updates and public health guidance on mosquito-borne diseases, covering chikungunya, dengue, Zika, and West Nile viruses. The reports provide a comprehensive view of the evolving situation across European countries.
Researchers argue that deliberate full extinction might be acceptable in rare cases, but only with careful consideration of ecological and moral implications. The study calls for robust ethical safeguards and inclusive decision-making frameworks to guide the use of genetic modification technologies.
Researchers at Heidelberg University developed high-resolution environmental suitability maps to identify areas conducive to breeding, leveraging satellite imagery and climate data. The maps help guide targeted interventions in mosquito-endemic urban areas.
Researchers found that male mosquito brains respond to a wider range of sounds than females and have more diverse responses. This suggests that males use complex acoustic cues to locate females in noisy environments, making traditional traps less effective.
A potent combination of antimalarial compounds blocks parasite transmission in mosquitoes while circumventing insecticide resistance. The new strategy retains activity even after a year and efficiently kills parasites even when applied to the female mosquito up to four days in advance of infection.
Researchers found over half of residential rain barrels in Champaign County had at least one mosquito-positive barrel. Effective prevention methods include mesh coverings, approved insecticides like Bacillus thuringiensis israelensis, and treating the water with chlorine or predators of mosquito larvae.
A project aims to understand how temperature, light pollution, and bird abundance affect West Nile virus transmission in mosquitoes. The goal is to advise health departments on the best time to kill bugs and limit transmission.
Utah State University ecologist Norah Saarman is developing an AI method to accurately identify Culex mosquito vectors of West Nile Virus using computer vision-based technology. This project aims to improve species identification, monitor populations, and track disease outbreaks with increased efficiency, accuracy, and cost-effectiveness.
Oropouche virus has been reported in travellers from Canada and the US who visited Bolivia, Brazil, Peru, and Cuba, with symptoms including fever, chills, headache, and muscle aches. The risk of miscarriage and microcephaly is high for pregnant individuals, prompting cautionary measures.
A new study found that higher temperatures reduce the effectiveness of natural mosquito repellents by desensitizing their pain receptors. This means mosquitoes may find these substances less irritating in hotter weather, potentially leading to increased bites and disease transmission.
Researchers at Johns Hopkins Bloomberg School of Public Health discovered a molecular quality-control system in Anopheles mosquitoes that can be targeted to disrupt malaria parasites. Disrupting the prefoldin chaperonin system reduced mosquitoes' ability to host and transmit malaria parasites, killing about 60% of them.
Researchers have identified novel mosquito repellents with high success rates from natural sources, including food and flavoring materials. The team's machine learning-based cheminformatics approach also pinpointed pyrethroid analogs up to 100 times more effective than existing industry standards.
A new study led by La Jolla Institute for Immunology scientists found that children who experience multiple dengue virus infections develop protective T cells, which help fight the virus. These T cells appear to be key to dengue virus immunity and may inform the development of a vaccine that prompts a similar response.
Researchers at Purdue University are studying mosquito antennae to develop acoustic sensors that can detect natural disasters like earthquakes and tsunamis. By mimicking the unique structure of these antennae, they hope to create more sensitive sound-detection technology.
A recent study identifies temperature and rainfall as key drivers of the global increase in dengue cases, offering actionable strategies for mitigating the disease's impact. The research found that dry season length variation is a decisive factor explaining contrasting effects of rainfall on dengue transmission.
The reemergence of dengue virus serotype 3 (DENV-3) in Brazil could worsen fresh outbreaks as the population is not immunized against this serotype. Researchers found a rise in DENV-3 cases since late 2023, with 31 blood samples testing positive for the virus.
The dengue virus uses its envelope protein to capture human plasmin, enhancing the permeability of the mosquito midgut. This interaction is crucial for viral infection, and understanding it could lead to innovative approaches to tackle vector-borne viruses.
Researchers found that mosquitoes drink blood to survive droughts, not just water, allowing them to bite more frequently when rain comes. This increases the risk of spreading diseases like malaria, dengue fever, and Zika during dry periods.
A study found that El Niño is associated with increased larval infestations of Aedes aegypti mosquitoes in open-air disused containers in São Paulo state. The index of positive containers rose by 1.30 in El Niño years compared to neutral or weak events.