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Low-magnification image of a Bacillus anthracis colony

Under very low magnification (5x), this photograph shows a close view of a Petri dish culture plate, upon which colonies of Bacillus anthracis bacteria had been cultivated. This view shows a single colony was featured, which exhibited a classic "medusa-head" or "judge's wig" morphology, a term given to colonies whose edges resemble a tangled mass of curly hair. (Photomicrograph taken in 1966 by Dr. Alan Lawrence Brodsky (1941-2016). Courtesy of Centers for Disease Control and Prevention Public Health Image Library, image 20498.)

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