This photograph depicts an enlarged view of the colonial morphology displayed by Gram-negative Yersinia pestis bacteria, which was grown on a medium of MacConkey agar, for a 24 hour time period, and at a temperature of 37�C. See PHIL 12487, for the appearance of Y. pestis bacterial colonies grown on the same medium, and at the same temperature, but for twice the time period (48hr).
CDC/ Amanda Moore, MT; Todd Parker, PhD; Audra Marsh
December 4, 2012
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