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Low-magnification image of colonies of Bacillus anthracis

Under very low magnification (2.5x), this photograph shows a close view of a Petri dish culture plate, upon which colonies of Bacillus anthracis bacteria had been cultivated, each exhibiting a roughly textured surface and irregular edges. (Photomicrograph taken in 1966 by Dr. Alan Lawrence Brodsky [1941-2016]. Courtesy of Centers for Disease Control and Prevention Public Health Image Library, image 20499.)

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