The next grippe pandemic may be hibernating in an golosh glacier or nipping Siberian lake, waiting for rising temperatures to mint it free. Then birds can deliver it back to civilization.
New look into suggests an flu virus could go into hiding in the nut when earlier generations of humans, birds or different hosts developed immunity arduous enough to drive the virus to extinction. Its a potpourri of evolutionary loophole.
It can bring a set of viral genes back to life that have been frozen for centuries or thousands of years, verbalize environmental biologist Scott Rogers of Bowling Green State University in Ohio. If hosts havent seen the virus in a while, past there may be no active immunity.
Rogers and Zeynep Koçer, of Bowling Green State University in Ohio, found that influenza viruses can easily survive freezing in puddle water, and emerge from the melting ice strong enough to defile bird eggs. They presented their latest evidence today at the American Society for Microbiology meeting in Philadelphia.
Rogers calls this evolutionary strategy genome recycling. He thinks migrating waterfowl regularly deliver influenza viruses to Arctic glaciers and lakes, where it becomes frozen in ice.
When the ice melts, birds pick the virus up and shipping it back south where it can infect humans.
The research comes amid a global alert over a new swine flu strain, H1N1, that has so far killed at least 80 populate and could be headed toward full-blown pandemic. Influenza pandemics have struck sporadically in historic times. The worst in recent storehouse were the Spanish flu in 1918, the Asian flu in 1957 and the Hong Kong flu in 1968.
These pandemics are hard to predict or trace back to their origins. Some researchers have proposed Siberia as a hub for the evolution of flu pandemics that eventually emerge in other locations â€" carried there by birds.
Scientists have in fact notice influenza viruses frozen in the ice and mud of lakes in...If you fate to get a full essay, order it on our website: Orderessay
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