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Colonies of Yersinia pestis growing on a blood agar plate. Yersinia pestis is the bacterium that causes the disease plague. Photo courtesy of the MGGen Center at NAU: http://www.mggen.nau.edu/
Colonies of Yersinia pestis growing on a blood agar plate. Yersinia pestis is the bacterium that causes the disease plague. Photo courtesy of the MGGen Center at NAU: http://www.mggen.nau.edu/