Researchers from the universities in Oslo and Ferrara concluded that the pandemic of bubonic plague in medieval Europe, called the “Black death” was caused not by rats but by people. Fleas and lice parasites in humans, contributed to the spread of the disease. About it reports BBC News.
The pandemic took place in Asia and Europe in 1347-1351 and killed more than 25 million people (in some regions were extinct before half of the population). Scientists have built several models of the epidemiological situation in nine European cities, each of which had a special way of transmission of the disease: in rats, human fleas and lice and airborne droplets.
It turned out that in seven of the nine cities in the second model (human parasites) are best consistent with the actual situation. If the plague was spread by fleas living on rodents, the disease does not spread as quickly.
According to the world health organization, between 2010 and 2015 worldwide was registered 3 248 cases of infection with plague, 584 people died.
In 2016 in the journal Molecular Biology and Evolution published an article of German scientists who found that the causative agent in the plague epidemic known as the plague Justiniana, was particularly contagious strain of the bacteria Yersinia pestis.
Video, photo All from Russia.