A closer view of PHIL 12216, this photograph depicts the colonial morphology displayed by Gram-negative Francisella tularensis bacteria, which is the pathogen responsible for causing the disease tularemia. These bacteria were grown on a medium of cysteine heart infusion agar (CHAB), for a 48 hour time period, at a temperature of 37�C.
CDC/ Dr. Todd Parker, Audra Marsh
December 4, 2012
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