what is causitive agent of black death??
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Plague is an infectious disease that affects animals and humans. It is caused by the bacterium Yersinia pestis.
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Key facts. Plague is caused by the bacteria Yersinia pestis, a zoonotic bacteria usually found in small mammals and their fleas. People infected with Y. pestis often develop symptoms after an incubation period of one to seven days. There are two main clinical forms of plague infection: bubonic and pneumonic.
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