jueves, 11 de marzo de 2010

La Peste Negra

BLACK PLAGUE

How the Black Death was transmitted? The three forms of the Black Death were transmitted through two paths. Bubonic and septicemic plague was transmitted by direct contact with a flea, while the pneumonic plague was transmitted by airborne droplets of saliva. Bubonic and septicemic plague was transmitted by the bite of an infected flea. Fleas, people, and rats as hosts for the disease. The bacterium (Yersinia pestis) times in blocking the flea the flea's stomach that makes be very hungry. The flea then start voraciously bite a host. Since the stomach feeding tube was blocked, the flea was unable to satisfy their hunger. Consequently, this followed a feeding frenzy. During the feeding process, infected blood carrying the plague bacterium, flowed into the wound of human being. The plague bacteria now had a new host. The flea soon starved to death.The pneumonic plague was transmitted

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