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.”
Could this protein protect people against coronary artery disease?
17.11.2017 | University of North Carolina Health Care
Microbial resident enables beetles to feed on a leafy diet
17.11.2017 | Max-Planck-Institut für chemische Ökologie
The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.
During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....
The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.
Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...
Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...
15.11.2017 | Event News
15.11.2017 | Event News
30.10.2017 | Event News
17.11.2017 | Physics and Astronomy
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17.11.2017 | Studies and Analyses