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Low-magnification image of colonies of Bacillus anthracis

Under low-power magnification (10x), this photograph depicts the colonial growth displayed by Sterne strain members of the Gram-positive bacterium, Bacillus anthracis, which were cultured on sheep blood agar for 48 hours at 37°C. (Photograph taken in 2014 by Dr. Todd Parker, Associate Director for Laboratory Science, Division of Preparedness and Emerging Infections at CDC. Courtesy of Centers for Disease Control and Prevention Public Health Image Library, image 17099.)

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