Historical experts noted, the plague of Justinian the first time occurred in the 6th century. The pandemic was coming from China and killed 30 to 50 million people when it was spread in Asia, North Africa, Arabia and Europe between the years 1347 and 1354. The experts are sure the outbreak, caused by bacteria carried by rodents that had brought down the Roman Empire, participated.
According to research results released in 2010 and 2011, the Black Death killed an estimated 75 to 200 million people in Europe and North Africa. Experts say outbreaks more resilient that also came from Asia it appears back in 1800 's. The plague of Justinian and the black death caused by different genetic variants of the same bacteria.
Experts link the genetic findings of the second pandemic was with the dig and analyze the DNA of the remains of people who died in the period of the plague of Justinian and the black death.
Hendrik Poinar, an expert on ancient DNA of Mc Master University in Ontario, Canada, said the bacterium that causes the plague was transmitted by rodents. In an interview, Poinar said that the source of the black death persists among people living in Madagascar and Southwest United States, a gesture that bacteria resistance.
"The current Outbreak on squirrels or prairie dogs in the American Southwest, all descendants of the black death. So, the black death was much more successful in spreading to the rest of the world while Justinian appeared and basically wiped out by itself. "
Like other infectious diseases, suggests the importance of supervision Poinar to ensure the outbreak does not become a pandemic. Poinar noted that current cities much cleaner than a few centuries ago, and there are things that he said will reduce the likelihood of a pandemic it pops back up.
"London the year 1348 is probably a dirty place. And now, we've got the anti biotic that can fight against the epidemic. And of course our cities in better shape and able to deal with such attacks, "added Poinar.
Monitoring of the source regions of the plague that is very important, says Poinar, mainly due to global warming could make the rodents in search of food and water to the settlements.
The article researchers Canada, Australia and the United States about the origin of this outbreak is contained in the journal The Lancet Infectious Diseases.
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