The black death

The Black Death was one of the deadliest pandemics in human history, peaking in Europe between 1348 and 1350. It is widely thought to have been an outbreak of bubonic plague caused by the bacterium Yersinia pestis, but this view has recently been challenged. Usually thought to have started in Central Asia, it had reached the Crimea by 1346. From there, probably carried by fleas residing on the black rats that were regular passengers on merchant ships, it spread throughout the Mediterranean and Europe.

The Black Death is estimated to have killed 30% to 60% of Europe's population, reducing the world's population from an estimated 450 million to between 350 and 375 million in 1400. This has been seen as creating a series of religious, social and economic upheavals which had profound effects on the course of European history. It took 150 years for Europe's population to recover. The plague returned at various times, resulting in a larger number of deaths, until it left Europe in the 19th century.

-How was transmitted?

The three forms of the Black Death were transmitted two ways. The septicemic and bubonic plague were transmitted with direct contact with a flea, while the pneumonic plague was transmitted through airborne droplets of saliva coughed up by bubonic or septicemic infected humans.

The bubonic and septicemic plague were transmitted by the the bite of an infected flea. Fleas, humans, and rats served as hosts for the disease. The bacteria (Yersinia pestis) multiplied inside the flea blocking the flea's stomach causing it to be very hungry. The flea would then start voraciously biting a host. Since the feeding tube to the stomach was blocked , the flea was unable to satisfy its hunger. As a result, it continued to feed in a frenzy. During the feeding process, infected blood carrying the plague bacteria , flowed into the human's wound. The plague bacteria now had a new host. The flea soon starved to death.
The pneumonic plague was transmitted differently than the other two forms . It was transmitted through droplets sprayed from the lungs and mouth of an infected person. In the droplets were the bacteria that caused the plague. The bacteria entered the lungs through the windpipe and started attacking the lungs and throat.

-Where did the plague arrive from?

The first recorded appearance of the plague in Europe was at Messina, Sicily in October of 1347. It arrived on trading ships that very likely came from the Black Sea, past Constantinople and through the Mediterranean. This was a fairly standard trade route that brought to European customers such items as silks and porcelain, which were carried overland to the Black Sea from as far away as China.

-How did the Black Death effect European civilization?

It affected Europe's population and also its economy. Changes in the size of civilization led to changes in trade, the Church, music and art, and many other things.
The Black Death killed off a massive portion of Europe's population. The plague is more effective when it attacks weakened people and Europe at the time was already weakened by exhaustion of the soil due to poor farming, the introduction of more sheep which reduced the land available for corn, and persistent Scottish invasions.
Fleas infected with the Bubonic Plague would jump from rats to travelers, killing millions and infesting the continent with world shaking fear. Normal people were tormented by the threat of death, causing them to change their views on leisure, work, and art. Even children suffered.

-What changes produced in the economic?

The economy was probably hit the hardest of all the aspects of Europe. The biggest problem was that valuable artisan skills disappeared when large numbers of the working class died. Therefore,those who had skills became even more valuable than the rich people. The society structure began to change giving formally poor laborers more say. The peasants and artisans demanded higher wages. Serfs seeking liberation from tilling their lord's land were told by decree and statue to return to their master's duties. The poor people saw so much death they wanted to enjoy life. Serfs began to leave their land and not engage in the planting of crops. Unattended crops and stray animals died of starvation because of the lack of care. Several domesticated animals began to roam the forest. Farming communities became rare. The lack of sufficient law enforcement personnel promoted lawlessness. People called "Bechini" pillaged homes, murdering and raping people. They dressed in red robes with red masks and only their eyes showed. The horror of the Black Death had taken on a new victim, the economy.