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The Black Death was one of the deadliest pandemics in human history. Yersinia pestis is a Gram-negative rod-shaped bacterium belonging to the family Enterobacteriaceae. Onset is marked by a high fever. Many victims complain of a general feeling of malaise accompanied by pain or tenderness in the lymph nodes, which may swell forming buboes, a characteristic of Bubonic Plague. Symptoms progress to include convulsions, shock, and hemorrhagic changes in the skin. Cyanosis from the necrotizing pneumonia produce the dark skin at the extremities lending to the term "black death."

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15y ago

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