West Nile virus has become a widespread human health concern, yet little attention is given to the grave situation facing certain wildlife species dying from the deadly disease, says a University of Alberta scientist. Cameron Aldridge is part of a research team to have shown that the West Nile Virus represents a significant new stressor on the sage-grouse—a species already on the endangered list in Canada and under current consideration for federal listing in the United States. "We dont yet know whether the sage-grouse are more at risk than other species but we do know that the West Nile virus could have devastating consequences for small populations," said Aldridge, a co-author on a research paper just published in "Ecology Letters."
Aldridge was part of a team that monitored radio-marked female sage-grouse from March 2003 to September 2004 in five sites in Alberta, Montana and Wyoming. They found that populations that had their first exposure to the virus in 2003, had a 25% decrease in late summer survival of females. West Nile virus was confirmed to have killed 18 individuals whose carcases could be relocated. Serum from 112 sage-grouse collected after the outbreak show that none had antibodies, suggesting that they lack resistance.
"When we tested individual sage grouse after the outbreak of the virus in 2003, we hoped we would find antibodies present for the virus, indicating some birds were infected, fought off the virus and survived, but we didnt see that," said Aldridge, a PhD candidate in the Faculty of Science. "The immunity appears to be extremely low for sage-grouse, which means it is going to take much longer for the population to develop resistance to the virus and to survive, if they are indeed capable. We dont know how long small populations like those found in Alberta or Saskatchewan can survive, while losing the genetic basis needed to maintain the population, but we may not have much time."
Phoebe Dey | EurekAlert!
First line of defence against influenza further decoded
21.02.2018 | Helmholtz-Zentrum für Infektionsforschung
Helping in spite of risk: Ants perform risk-averse sanitary care of infectious nest mates
21.02.2018 | Institute of Science and Technology Austria
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
21.02.2018 | Physics and Astronomy
21.02.2018 | Physics and Astronomy
21.02.2018 | Earth Sciences