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This photograph depicts the colonial morphology displayed by Gram-negative, Francisella tularensis bacteria, which were grown on a medium of modified Thayer-Martin (MTM) agar, for a 72-hour time period, at a temperature of 37°C. Take a look at PHIL 12444 and 12445, which depict the appearance of F. tularensis colonies grown on the same medium, and at the same temperature, but for one-third the time (24hr). Also see PHIL 12446, for the appearance of bacterial colonies, again, grown on the same medium, and at the same temperature, but also, for a lesser time period (48hr). This bacterium is both an animal, and a human pathogen, and is responsible for causing the disease known as tularemia.
High Resolution: Click here for hi-resolution image (14.47 MB)
Content Providers(s):CDC/ Amanda Moore, MT; Todd Parker, PhD; Audra Marsh
Creation Date:2010
Photo Credit:Pete Seidel
CDC Organization
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Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.