Image of the Week for August 18, 2008
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Plague
Plague. Dark stained bipolar ends of Yersinia pestis can clearly be seen in this Wright stain of blood from a plague victim. The actual cause of the disease is the plague bacillus, Y pestis. It is a nonmotile, non-spore-forming, gram-negative, non-lactose fermenting, bipolar, ovoid, "safety-pin-shaped" bacterium.
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