Yes Since the reign of Emperor Justinian in 542 A.D., man has wholeness unwanted organism along for the ride, Yersinia pestis. This is the bacterium more commonly be intimate as the Black Death, the offense. Plague is divided into three biotypes, all(prenominal) associated with one of three major pandemics occurring in history. Each of these biotypes ar so divided into three distinct types, classified by mode of infection. The most widely know is bubonic, an infection of plague that resides in the lymph nodes, causing them to swell. The Black Death of the 14th snow was generally of this type. Bubonic plague is commonly spread with fleas that have make a meal from an infected genus Rattus rattus. The most parlous type of plague is pneumonic. It can be spread completed aerosol droplets released through coughs, sneezes, or through fluid contact. It may also become a substitute(prenominal) result of a character of untreate d bubonic or septicemic plague. Although not as common as the bubonic strain, it is...If you want to get a full essay, order it on our website: BestEssayCheap.com
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