Despite being so small they can’t be seen with the naked eye, pathogens that cause human disease have greatly affected the way humans live for centuries.
It’s the ability of our immune system to remember past infections, and pass this memory on to our kids, that allows us to survive infectious diseases.
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It’s a deadly bacterium that can spread like wildfire. New research suggests Yersinia pestis first developed its ability to cause lung infection and then evolved to be highly infectious.
A model of the bubonic plague bacterium, which is known as Yersina pestis.
Tim Evanson/Flcikr
Cases of plague have been reported in the Chinese city of Yumen, where a man has died of the disease. Control measures taken by the authorities include travel restrictions in and out of the city, and 151…
Richard Stabler, London School of Hygiene & Tropical Medicine
Chinese authorities have lifted a nine-day quarantine on a town in the country’s northwest that saw a resident die of the plague. The victim is thought to have caught the disease from a dead marmot, which…
About 6,000 years ago, a bacterium underwent a few genetic changes. These allowed it to expand its habitat from the guts of mice to that of fleas. Such changes happen all the time, but in this particular…
At least we won’t have to queue at the job centre when this is over.
Toggenburg Bible
The plague known as the Black Death which tore through 14th century Europe is traditionally held to have had at least one upside. Women, the theory runs, were able to exploit the labour shortages of post-plague…
We may have pinpointed the event that started modern Y. pestis epidemics.
Steam Pirate.
Could contemporary plague outbreaks such as those that have hit Peru and the USA have their origins in the medieval era? It would seem so. A paper published in Nature today reports a genome sequence taken…