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Yersinia pestis is the causative agent for ................

  • A.Gas gangrene
  • B.Tularemia
  • C.Lyme disease
  • D.Plague

Answer: D

Yersinia pestis causes plague.

The bacterium is carried by rodents and spread to humans mainly by the bites of infected fleas, causing bubonic plague, with swollen lymph nodes; it can also spread to the lungs as pneumonic plague, transmitted between people by droplets. It was responsible for the Black Death of the fourteenth century.

Gas gangrene is caused by Clostridium perfringens, tularemia by Francisella tularensis, and Lyme disease by Borrelia burgdorferi.

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