How does the West Nile virus, which is transmitted by mosquitoes, survive the cold mosquito-free months of winter? In New York City, West Nile’s initial beachhead in North America, researchers found that the virus persisted in a kind of suspended animation in mosquitoes hibernating in sewers. But in much of the South, mosquitoes do not truly hibernate during winter — they just reduce their activity rate during cold periods, revving back up whenever the weather warms.
Understanding how the West Nile virus gets through winter under these conditions is crucial to understanding the ecology of West Nile in locations like the Gulf Coasts of Texas and Louisiana. Because of bird-migration patterns, these areas may be significant to the seasonal return of the virus to other parts of North America. In the September issue of the Centers for Disease Control and Prevention-sponsored journal Emerging Infectious Diseases, scientists at the University of Texas Medical Branch at Galveston (UTMB) and the Harris County and Galveston County (Texas) mosquito control offices report an initial step toward achieving that goal: the first successful detection of West Nile virus in mosquitoes and dead birds collected near the Texas and Louisiana Gulf Coasts between the months of November and March.
“The evidence suggests year-round West Nile activity in the Gulf region, with virus transmission persisting at a low level throughout the winter months,” said UTMB pathology professor Robert Tesh, the study’s senior author. “That’s quite different from how the virus appears to over-winter in colder regions like New York.”
Microscope measures muscle weakness
16.11.2018 | Friedrich-Alexander-Universität Erlangen-Nürnberg
Good preparation is half the digestion
16.11.2018 | Max-Planck-Institut für Stoffwechselforschung
Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.
Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...
Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.
Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...
Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...
On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure
Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...
09.11.2018 | Event News
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16.11.2018 | Health and Medicine
16.11.2018 | Life Sciences
16.11.2018 | Life Sciences