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Tag: "parasite" at biology news

New moth variety disarms plants guarded by selenium

...sis showed that the selenium-tolerant moth and its parasite both accumulate selenium in the form of methylselenocysteine, the same form found in the hyperaccumulator plant, whereas related but selenium-sensitive moths accumulate selenium as selenocysteine. The latter form is toxic because of its ability to be...

Dragonfly's metabolic disease provides clues about human obesity

...t links metabolic disease to a supposedly harmless parasite living in the dragonfly's gut. The parasites, kno...chronic problems with Cryptosporidium (a protozoan parasite closely related to the one found in dragonflies) that over time impairs their metabolism in a simila...

Malaria vaccine prompts victims' immune system to eliminate parasite from mosquitoes

...ire geographic regions, by eradicating the malaria parasite from an area's mosquitoes. The vaccine, so far t...ystem of a person who receives it to eliminate the parasite from the digestive tract of a malaria-carrying mosquito, after the mosquito has fed upon the blood o...

Bacterial protein shows promise in treating intestinal parasites

...for the treatment of hookworm and other intestinal parasite infections," said Raffi Aroian, an associate profe...ies also determined which life cycle stages of the parasite were most susceptible to Cry5B and at what concentrations. "These experiments confirmed that the ...

UGA scientists engineer root-knot nematode resistance

...d Hussey has spent 20 years studying a worm-shaped parasite too small to see without a microscope. His discove... the parasitism genes that make a nematode a plant parasite so it can attack and feed on crops, Huang said. "Our results of in-plant RNA interference silencing...

Parasitic plants sniff out hosts

... pest to eliminate because chemicals that kill the parasite also often kill the host plant. "There is current... establishing the role of volatiles in leading the parasite plants to their tomato hosts, the researchers looked at other potential hosts including wild impatie...

New treatment for severe malaria

...e blood vessels is that once in the blood cell the parasite produces proteins that project from the surface of the cell and bind with receptors on other blood cells and on the vessel wall, and thus act like a glue. The challenge facing scientists has been to break these bonds so that the infected blood cells ...

New understanding of parasite cell structures may provide treatments for serious tropical diseases

...s especially important in better understanding the parasite Trypanosoma brucei, which causes human African try...hildren in 36 countries of sub-Saharan Africa. The parasite is transmitted to humans through the bite of the tsetse fly, in which the trypanosome transfers from...

How bad is malaria anemia? It may depend on your genes

... already are infected by malaria parasites. The parasite that causes malaria - known as plasmodium - is carried through blood by mosquito bites, and in parts of the world where mosquitoes thrive, millions are infected, most of them by early childhood. Once in the bloodstream, plasmodium invades liver and r...

DNA to the defense

... at the University of Cambridge has shown that the parasite known to cause African sleeping sickness has evolv...ness, or trypanosomiasis, is caused by a protozoan parasite known as Trypanosoma brucei . Endemic to sub-Saharan Africa, it is transmitted by tsetse flies and...

Movie spies on malaria parasite's sneaky behavior

... the Institut Pasteur in Paris, filmed the malaria parasite as it transitioned from infecting liver cells to i... Medicine in Hamburg, Germany. Their images of the parasite sneaking back into the host's bloodstream--published in advance online in Science Express on August ...

Wild vs. lab rodent comparison supports hygiene hypothesis

...imals is protective because the antibodies bind to parasite antigens, while the same antibodies in laboratory animals would bind to abundant but harmless environmental antigens, leading to allergies to those antigens." "These results are consistent with the idea that animals without access to modern medicine...

Even a little cooling helps after cardiac arrest

...ore parasites, the healthier the marsh. While the parasite hypothesis may conflict with conventional ideas ab...s California Sea Grant recently awarded support to parasite mavens Armand Kuris of the Department of Ecology, Evolution and Marine Biology at the University of ...

How healthy is that marsh? Biologists count parasites

...ore parasites, the healthier the marsh. While the parasite hypothesis may conflict with conventional ideas ab...s California Sea Grant recently awarded support to parasite mavens Armand Kuris of the Department of Ecology, Evolution and Marine Biology at the University of ...

Research reveals inner workings of immune system 'thermostat'

...es of experiments in mutant mice infected with the parasite Toxoplasma gondii. They found that Interleukin 10 production by T helper 1 cells is triggered by Interferon-γ***but not directly. Another cell, an antigen presenting cell or APC, sends a stimulatory signal back to the T helper 1 cell, ordering it to ...

African parasite makes component of fat differently from all other organisms

Studying the parasite that causes African sleeping sickness, scientists ...nveils more about the biology of this hard-to-kill parasite and could lead to a target for designing new drugs to fight the illness that infects a half-million ...

Researchers add crucial information on how the body's T cells react to parasitic diseases

...ly in the Americas, and kills 50,000 of those. The parasite that carries it, T. cruzi, is transmitted to mamma...ial for the parasite," said Tarleton, "because the parasite must have sialic acids to invade cells and infect the host. But since it doesn't have it, it must st...

Parasitic worms used to fight bowel disease

...own as the whipworm, or Trichuris suis, which is a parasite that afflicts pigs. Early studies have shown that giving humans a concoction of whipworm eggs and Gatorade is very effective in treating inflammatory bowel disease. Mansfield and colleagues are using some of the NIH funding to develop an animal mode...

Malaria, potato famine pathogen share surprising trait

... jump to humans, nor is it likely that the malaria parasite will start infecting plants. However, he said it's feasible to think that one day researchers could develop a drug with a dual purpose ?one that would stop both Plasmodium falciparum, which causes malaria, and Phytophthora infestans, the microbe tha...

Oxidation defense in mosquitoes benefits malaria parasite

...key role in the sexual reproduction of the malaria parasite (Plasmodium falciparum) in A. gambiae mosquitoes. ...nopheles gambiae, where XA also helps the malarial parasite reproduce. So stopping the oxidative defense could stop the parasite as well as make the insect a vi...

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