The normal habitat of ________ is rodents, but humans bitten by fleas carrying the pathogen have fever, severely inflamed lymph nodes, and headache. Later, areas of black, necrotic tissue may develop.

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Yersinia pestis is the pathogen responsible for causing the disease called plague. The normal habitat of the bacteria is rodents, but humans can contract the disease through flea bites. Symptoms include fever, severely inflamed lymph nodes (buboes), and headache. In severe cases, black, necrotic tissue can develop, leading to the term "black death."

The Normal Habitat of ________ Is Rodents, but Humans Bitten