
Yersinia Pestis

by Science Source
Title
Yersinia Pestis
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Science Source
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Photograph - Photograph
Description
Yersinia pestis, direct fluorescent antibody stain (DFA), 200x magnification. Yersinia pestis is the bacterium that causes bubonic plague (the black death of the middle ages). This bacterium is primarily a flea-carried pathogen of rats. Infection is rapid, causing swelling in the lymph nodes and leading to septicemia and pulmonary infection. Extensive control measures, directed against the rats as well as their fleas, have essentially banished the plague from Europe, but there are still many regions of the world where the disease occurs.
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February 19th, 2013
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