In 1348 an unknown disease was introduced in Europe and death spread throughout the continent:erupted between 1346-1347 plague most of Europe, the Black Death accompanied the Europeans until the eighteenth century, plague was a disease unknown to Europeans but it was different to other diseases and affecting all alike, and were beggars, kings ....There are many opinions about the origin of the plague: some thought it was due to physical contact others believed it was for the eclipses, planets ...In the nineteenth century Kitasato and Yersin discovered the source of the plague and pestilence had come from, so the bacteria and was transmitted through the parasites of rats especially fleas
The plague was a disease introduced in the mid- 14th century, this became one of the most dreaded diseases since it acted as both pogres rich. People seek many origins to this terrible disease , some people thought it was due to the corruption of the air caused by the emission of organic matter or by astrological phenomena . In the 19th century the supernatural origin of the plague discovered Kitasato and Yersin independently was discovered but almost in unison , the origin of the plague was was yersinia bacteria pestis, affecting black rats and other rodents and transmitted through parasites living in these animals .The bacteria lived households between 16 and 23 days before the disease was discovered. Passed three to five days until the first deaths disease manifested in English , armpit or neck, swelling of one of the nodes of the lymphatic system and suppuration accompanied by high fever that caused chills in patients occur, ramps and delirium , the swollen lymph node was called bubo anthrax , hence the term " bubonic plague ". The most common form of the disease was the primary bubonic plague , but there were other variants : septicemic plague , which passed the contagion blood , so the name was manifested in the form of visible dark spots on the skin -hence "black death" that received the epidemic - and pneumonic plague , affecting the respiratory and caused an expectorant cough could lead to contagion through the air . Septicemic plague and pneumonic plague left no supervivientes.la river and land sea routes so only freed from this plague Finland and Islandia.los 80 million Europeans were reduced to only 30 between 1347 and 1353 was propagated .
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