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Group A Streptococcus, Streptococcus pyogenes bacteria atop the surface of neutrophil

Digitally colorized scanning electron microscopic (SEM) image depicts four yellow-colored Group A Streptococcus (GAS), Streptococcus pyogenes bacteria, which were atop the surface of neutrophil. (Produced by the National Institute of Allergy and Infectious Diseases [NIAID], 2009. Courtesy of the Centers for Disease Control and Prevention Public Health Image Library. Image 18257. Public domain.)

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