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.”
Water forms 'spine of hydration' around DNA, group finds
26.05.2017 | Cornell University
How herpesviruses win the footrace against the immune system
26.05.2017 | Helmholtz-Zentrum für Infektionsforschung
Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
24.05.2017 | Event News
23.05.2017 | Event News
22.05.2017 | Event News
26.05.2017 | Life Sciences
26.05.2017 | Life Sciences
26.05.2017 | Physics and Astronomy