Researchers from the Johns Hopkins Bloomberg School of Public Health and other institutions report that satellite imagery could be used to determine areas at high-risk for exposure to Sin Nombre virus (SNV), a rodent-born disease that causes the often fatal hantaviral pulmonary syndrome (HPS) in humans. According to the researchers, satellite imaging detects the distinct environmental conditions that may serve as a refuge for the disease-carrying deer mice. Higher populations of infected deer mice increase the risk of HPS to humans. Their findings are published in the study, “Satellite Imagery Characterizes Local Animal Reservoir Populations of Sin Nombre Virus in Southwestern United States,” which will appear in the December 2, 2002, issue of the Proceedings of the National Academy of Sciences.
Gregory E. Glass, PhD, professor of molecular microbiology and immunology in the Johns Hopkins Bloomberg School of Public Health, said, “This is an important finding because, at a practical level, it provides a way to monitor the environment for the risk of an infectious disease before an outbreak occurs. At a more basic level it gives us a way to better understand why outbreaks happen when and where they do.”
Before satellite imaging was used to predict high-risk areas, the only SNV tracking method was through rodent sampling or follow-up to human cases of disease. Johns Hopkins Bloomberg School of Public Health researchers used Landsat Thematic Mapper (TM) satellite data from 1997 and 1998 to identify environments associated with human risk of HPS caused by rodent SNV. LANDSAT 5 TM imagery was obtained for a study area in the southwestern United States where HPS was initially recognized in 1993. The images were processed and HPS risk maps were generated. Logistic regression was used to estimate risk using the digital numbers in each of the three TM bands. The researchers teamed with workers from the University of New Mexico, the Centers for Disease Control and Prevention, and the IBM T.J. Watson Research Center to validate the analysis. Field and laboratory studies of collected rodents were performed in 1998 and 1999. The sample consisted of 15,042 rodents. Researchers tested the deer mice for SNV and then compared their findings to their satellite projected images.
Inselspital: Fewer CT scans needed after cerebral bleeding
20.03.2019 | Universitätsspital Bern
Building blocks for new medications: the University of Graz is seeking a technology partner
19.03.2019 | Karl-Franzens-Universität Graz
DESY and MPSD scientists create high-order harmonics from solids with controlled polarization states, taking advantage of both crystal symmetry and attosecond electronic dynamics. The newly demonstrated technique might find intriguing applications in petahertz electronics and for spectroscopic studies of novel quantum materials.
The nonlinear process of high-order harmonic generation (HHG) in gases is one of the cornerstones of attosecond science (an attosecond is a billionth of a...
Nano- and microtechnology are promising candidates not only for medical applications such as drug delivery but also for the creation of little robots or flexible integrated sensors. Scientists from the Max Planck Institute for Polymer Research (MPI-P) have created magnetic microparticles, with a newly developed method, that could pave the way for building micro-motors or guiding drugs in the human body to a target, like a tumor. The preparation of such structures as well as their remote-control can be regulated using magnetic fields and therefore can find application in an array of domains.
The magnetic properties of a material control how this material responds to the presence of a magnetic field. Iron oxide is the main component of rust but also...
Due to the special arrangement of its molecules, a new coating made of corn starch is able to repair small scratches by itself through heat: The cross-linking via ring-shaped molecules makes the material mobile, so that it compensates for the scratches and these disappear again.
Superficial micro-scratches on the car body or on other high-gloss surfaces are harmless, but annoying. Especially in the luxury segment such surfaces are...
The Potsdam Echelle Polarimetric and Spectroscopic Instrument (PEPSI) at the Large Binocular Telescope (LBT) in Arizona released its first image of the surface magnetic field of another star. In a paper in the European journal Astronomy & Astrophysics, the PEPSI team presents a Zeeman- Doppler-Image of the surface of the magnetically active star II Pegasi.
A special technique allows astronomers to resolve the surfaces of faraway stars. Those are otherwise only seen as point sources, even in the largest telescopes...
Researchers at Chalmers University of Technology and the University of Gothenburg, Sweden, have proposed a way to create a completely new source of radiation. Ultra-intense light pulses consist of the motion of a single wave and can be described as a tsunami of light. The strong wave can be used to study interactions between matter and light in a unique way. Their research is now published in the scientific journal Physical Review Letters.
"This source of radiation lets us look at reality through a new angle - it is like twisting a mirror and discovering something completely different," says...
11.03.2019 | Event News
01.03.2019 | Event News
28.02.2019 | Event News
22.03.2019 | Life Sciences
22.03.2019 | Life Sciences
22.03.2019 | Information Technology