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Plague is caused by the organism Yersinia pestis. Rodents, such as rats, spread the disease to humans. People can get the plague when they are bitten by a flea that carries the plague bacteria from an infected rodent. In rare cases, you may get th...
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Fleas carry the bacterium Yersinia pestis. When a flea bites an infected rodent, it swallows the plague bacteria. The bacteria is passed on when the fleas, in turn, bite a human. Interestingly, the plague bacterium grows in the gullet of the flea,...
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