The Ongoing Legionnaires' Outbreak

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Colorized scanning electron micrograph (SEM) with moderately-high magnification of 8000X depicting a large grouping of Gram-negative Legionella pneumophila bacteria.
( Janice Haney Carr; provided by CDC/Margaret Williams, PhD; Claressa Lucas, PhD; Tatiana Travis, BS / Centers for Disease Control and Prevention's Public Health Image Library )
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