Under a high magnification of 12000X, this scanning electron micrograph (SEM) depicted a small grouping of Gram-negative Legionella pneumophila bacteria. Please see PHIL 11092 through 11152 for additional SEMs of these organisms, specifically PHIL 11124 for a colorized version of this image. It appears that a few are still joined to one another just prior to the completion of their reproductive process known as cell division. In some of these views you'll note the presence of flagellar appendages.
CDC/ Margaret Williams, PhD; Claressa Lucas, PhD;Tatiana Travis, BS
December 4, 2012
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