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Tag: "spreading" at biology news

Virologist finds contagious equine flu in dogs

...lated a highly contagious equine flu virus that is spreading a sometimes-fatal respiratory flu among dogs, and ...f infected dogs showing symptoms, the flu could be spreading throughout the country. It was originally documented in greyhounds at tracks and kennels but now is ...

Oxygen increase caused mammals to triumph, researchers say

...an domination of the planet. It was the subsequent spreading of shallow seas, the increase in plant life - and photosynthesis - in addition to the consequent increase in oxygen content that gave the mammals the boost they needed, according to Falkowski. In the last 10 million years, the percentage of oxygen i...

Researchers seek to discover what really happens when a virus enters the body

...atically produce a quantitative description of the spreading of the virus as well as the host-virus interaction. "The immuno-fluorescent intensity signals (IIS) depict how the virus and host are interacting over time, from the point of origin to the point of infection," Bell says. Ultimately, the interdiscip...

Studies reveal how plague disables immune system, and how to exploit the process to make a vaccine

...at terrorists could exploit Y. pestis as a weapon, spreading it widely and rapidly as an aerosol rather than through fleabites and rodents. Contracted this way -- infecting the lungs rather than the bloodstream -- the disease is known as pneumonic plague. This form of the infection progresses faster, spreads e...

New understanding of cell movement may yield ways to brake cancer's spread

...athogenic organisms, and cancer cells metastasize, spreading deadly disease through the body. Scientists studying these migrations didn't know how cells determined where to go. Until now. A Burnham Institute study has identified a fragment of a protein that senses chemicals that induce a cell to move into the...

Pair of cancer genes found to drive both cell migration and division

...ns. In addition, cell migration can lead to tumors spreading and developing in different places in the body," says Peter Devreotes, Ph.D., professor and director of Cell Biology at the Johns Hopkins School of Medicine's Institute for Basic Biomedical Sciences. "Now that we know that PTEN and PI3K are involved ...

Scientists identify genes responsible for 'black rot' disease in vegetables

...y and temperature), Xcc infects vegetable crops by spreading through the plants' vascular tissues, turning the veins in their leaves yellow and black, and causing V-shaped lesions along the margins of the leaves. All vegetables in the crucifer family, including broccoli, Brussels sprouts, cabbage, cauliflower,...

Researchers find gene that may be at root of potato blight

...ell death is how the plant keeps the pathogen from spreading to other cells," Kamoun said. "Only a few cells die. It's one mechanism of defense some plants have." Until now, researchers knew little about P. infestans on the molecular level. By studying Avr3a, R3a and similar genes, researchers may be able to...

Six million Africans face famine because of locusts, drought

...ritania, Mali and Niger are suffering from rapidly spreading malnutrition and in Niger many villagers have been feeding themselves with wild plants, it said. ...

Changing ecosystems throw scientists mega-challenges

...s, the degradation of freshwater resources, global spreading of diseases, and the increasing threat of biological and chemical terrorism. Among the research challenges are the need to understand how and why these changes are occurring—especially when multiple stresses are acting on environmental systems simult...

Road salt affects mitigation wetlands

... that is slightly affected by splashover from salt spreading and snow melting. The data loggers record salinity hourly. "Salt levels in the runoff wetland reach peaks that are half as salty as sea water," Silver told attendees at the North American Benthological Meeting today (May 24) at the 2005 Joint Assemb...

Leprosy microbes lead scientists to immune discovery

... damage, but in other cases yields to a dangerous, spreading infection. Led by Stephan R. Krutzik of UCLA, a team of scientists that includes Barry R. Bloom, Dean of the Harvard School of Public Health, reported the work on May 8 in an advance online publication of Nature Medicine. The researchers isolated i...

Microbial forensics: The next great forensic challenge

Deliberately spreading disease among the enemy has been occasionally practiced over hundreds of years. But modern bioterrorism is more chilling than ever because of rapidly expanding knowledge about infectious diseases and biotoxins and their potential to wreak havoc in co...

New studies suggest airborne SARS transmission is possible

...ementary evidence that the virus may be capable of spreading through the air. ...

NIAID Initiates Trial of Experimental Avian Flu Vaccine

...e virus will develop the capability of efficiently spreading from human to human and thus create a risk for a worldwide pandemic,?says NIAID Director Anthony S. Fauci, M.D. “NIAID has supported research on H5N1, the strain responsible for this deadly form of avian influenza, since 1997 when the first cases in...

Introduced foxes transformed vegetation on Aleutian Islands from lush grasslands to tundra

...nd by feeding on marine fish and invertebrates and spreading nutrient-rich guano around the islands. Add foxes, and the indirect effects on the whole ecosystem are as dramatic as the direct effects on the seabirds. "Introduced species are a global phenomenon, and we tend to focus on the direct effects, such a...

First-ever Compounds To Target Only Metastatic Cells Are Highly Effective Against Breast, Prostate, And Colon Cancers

Two compounds that zero in on cancer cells spreading throughout the body, while ignoring primary tumor cells, could someday give doctors a whole new weapon in the fight against tough-to-treat metastatic disease, according to Weill Medical College of Cornell University researchers. The compounds, calle...

Male circumcision reduces risk of HIV transmission from women to men

...information may help usunderstand why the virus is spreading rapidly in parts of Africa, andhelp define better HIV strategies for prevention in these settings....

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