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Tag: "mosquitoes" at biology news

Examination of internal 'wiring' of yeast, worm, and fly reveals conserved circuits

...e genomes of everything from malaria pathogens and mosquitoes to mouse and human. Databases of genomic information have been combined with databases that list the precise subunit sequence of proteins as well. Cross-species DNA and protein comparisons have become routine for all biologists with computerized sear...

Falling ants glide back to trunk to avoid dangers of forest floor

...d 100 feet up in the rainforest canopy waiting for mosquitoes to alight and feed on his blood, Yanoviak casually...ito colony in the laboratory, he goes in search of mosquitoes and larvae in the canopy where they live, mostly above private land around the city. Using ropes and...

Reducing malarial transmission in Africa

...metocytes carried and how able they were to infect mosquitoes 7 days later was also reduced by the six dose regi...05) Reduction of malaria transmission to Anopheles mosquitoes with a six-dose regimen of coartemether. PLoS Med 2(4): e92. ...

WHO Warns Of Increased Risk Of Vector-borne Diseases In Tsunami-affected Areas

...a Aceh today. "For example, we do not know whether mosquitoes - which generally mostly live and bite outdoors - ...eding. While pools of salt water would not support mosquitoes by themselves, but once diluted by rains, they can become ideal breeding places for the malaria vect...

University of Nevada, Reno research team discovers hormone that causes malaria mosquito to urinate

...sucks blood from a human--and only pregnant female mosquitoes do this--it will take in twice its body weight in blood. To decrease this added weight, the mosquito urinates on its victim to release fluids. Coast discovered that introducing one of the two diuretic hormones, DH31, into the mosquito causes the mo...

Scientists show that tick-borne flaviviruses use a novel mechanism to evade host defenses

... ways depending on whether they are transmitted by mosquitoes or ticks. This finding could lead to new approaches to developing vaccines and treatments against these illnesses. "Flaviviruses exact an enormous toll in terms of illness and death worldwide," notes NIAID Director Anthony S. Fauci, M.D. "Because th...

Researchers discover how malaria parasite disperses from red blood cells

...s part of its life cycle in the salivary glands of mosquitoes and is transmitted to human beings through the bite of infected mosquitoes. The parasite infects red blood cells. Called a merozoite at the stage of its life when it infects red blood cells, the parasite multiplies inside the cell, until the cell r...

Mosquito study shows new, faster way West Nile can spread

...veston (UTMB) have discovered a quick new way that mosquitoes can pass West Nile virus to each other. The new st...ventional understanding of West Nile transmission, mosquitoes acquire the virus when they bite birds with high levels of virus (or "high viremia.") in their blood...

Mosquitoes are more attracted to individuals infected with malaria

...ya by Jacob Koella and colleagues now reveals that mosquitoes are more attracted to children with the infectious...of just the parasite. To measure how attracted the mosquitoes were to the participants, the researchers set up a chamber of uninfected female mosquitoes surrounde...

Hurricane aftermath: Infectious disease threats from common, not exotic, diseases

...inated food or water as well as diseases caused by mosquitoes or other insect bites are also a threat. Vibrio...r disease outbreaks," says Berkelman. Furthermore, mosquitoes do not spread disease by feeding on dead bodies. There is, however, a risk of mosquito-borne disease...

DDT-resistant insects have additional genetic advantage that helps resistance spread

...malaria and lice that carry typhus. DDT-resistant mosquitoes were first detected in India in 1959, and they hav...that when a local spray program is begun now, most mosquitoes become resistant in a matter of months rather than years. Worryingly, some resistant strains also s...

Fighting malaria by manipulating mosquitoes' sense of smell

... the genetics, biology, immunology and behavior of mosquitoes open up new and unexplored avenues for controlling...ersity where their effects on the behavior of live mosquitoes will be determined. Compounds that pass the behavioral tests will be forwarded to Tanzania, where th...

Gene that helps mosquitoes fight off malaria parasite identified

Researchers have identified a gene in mosquitoes that helps the insects to fight off infection by t...arasite, which causes malaria in humans. Anopheles mosquitoes transmit the malaria parasite to nearly 550 million people worldwide each year with these cases resu...

New GM mosquito sexing technique is step towards malaria control, report scientists

Scientists have genetically modified male mosquitoes to express a glowing protein in their gonads, in a...eam from Imperial College London have altered male mosquitoes to express a green fluorescent protein in their gonads. Coupled with a high speed sorting technique,...

Researchers develop new method to help find deadly malaria parasite's Achilles heel

...arum has developed resistance to those drugs. Even mosquitoes that transmit malaria are developing resistance to the most commonly used insecticides. "The demonstration that the Plasmodium protein network differs significantly from those of several model organisms is an intriguing result that could lead to the...

Malaria parasites develop in lymph nodes

...énard. To find out, he and his colleagues infected mosquitoes with fluorescently tagged Plasmodium parasites, and then allowed the mosquitoes to bite a mouse. From each mosquito bite, they found an average of 20 fluorescent parasites embedded...

Warming trend may contribute to malaria's rise

...atures may be making conditions more favorable for mosquitoes and pathogen development, leading in turn to the surge in malaria cases. But a 2002 study found no significant changes in average temperature in the highlands of East Africa, where malaria has become a serious public health problem, prompting its au...

Genetically engineered mosquitoes show resistance to dengue fever virus

...rus, the most prevalent strain of the disease. The mosquitoes that survived the procedure also remained fertile ...ed a vulnerability of the dengue virus to make the mosquitoes resistant to infection. This vulnerability occurs when the virus replicates and its single strand of...

Oxidation defense in mosquitoes benefits malaria parasite

...ng from 3-hydroxykynurenine (3-HK) accumulation in mosquitoes and possibly other species as well. "3-HK is oxidi...s biochemical pathways of disposing of 3-HK, which mosquitoes lack. Research by Li's group at Virginia Tech on Aedes aegypti mosquitoes determined that "mosquitoe...

Colombian frog believed extinct found alive

...ue to the disappearance of amphibians that feed on mosquitoes carrying the disease. An extinction crisis among amphibians indicates drastic environmental changes caused by human impact such as deforestation and global warming. ...

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