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The Pyrenean ibex, an impressive mountain goat that lived in the central Pyrenees in Spain, went extinct in 2000. But a...
Tight budgets are forcing NASA to consider turning off one or more planetary science projects that have completed their...
Ebola is not a stranger to West Africa—an outbreak in the 1990s killed chimpanzees and sickened one researcher. But the...
In an as-yet-unpublished report, an international panel of geoscientists has concluded that a pair of deadly...
Tropical disease experts tried and failed before to eradicate yaws, a rare disfiguring disease of poor countries. Now,...
Since 2002, researchers have reported that agricultural communities in the hot and humid Pacific Coast of Central...
Balkan endemic kidney disease surfaced in the 1950s and for decades defied attempts to finger the cause. It occurred...
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ScienceShot: Europe's Black Death Spawned Modern Plague Strains
12 October 2011 2:21 pm
These skeletons—excavated in the 1980s from a 14th century graveyard in London—belonged to six of the estimated 30 million people who died from the Black Death, the plague epidemic that swept Europe between 1347 and 1351. Researchers have now used teeth from the same graveyard—home to some 2500 plague victims—to reconstruct 99% of the genome of Yersinia pestis, the bacterium that causes plague. An analysis of that microbial DNA, published online today in Nature, suggests that Y. pestis strains currently circulating around the world are all descendents of the medieval strain, which is believed to have killed 30% to 60% of Europe's population. The 14th century genome closely resembled those of modern strains and did not have any obvious unique mutations that might explain its unprecedented virulence. Other factors—such as the population's susceptibility or the ecology of rodents and fleas, which help spread the disease—were probably responsible for the medieval massacre, the team concludes.
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