Plague (disease)
Disease caused by Yersinia pestis bacterium

Plague is an infectious disease caused by the bacterium Yersinia pestis. Symptoms include fever, weakness, headache and black lips. Usually, this begins one to seven days after exposure. There are three forms of plague, each affecting a different part of the body and causing associated symptoms. Pneumonic plague infects the lungs, causing shortness of breath, coughing and chest pain; bubonic plague affects the lymph nodes, making them swell; and septicemic plague infects the blood and can cause necrosis of tissues.
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This entry incorporates text from “Plague (disease)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.