Under a moderate magnification of 3500X, this scanning electron micrograph (SEM) depicted a number of Gram-negative Legionella pneumophila
bacteria. Please see PHIL 11092 through 11152 for additional SEMs of these organisms, specifically PHIL 11134 for a black and white version of this image. Of particular importance, is the presence of polar flagella, and pili, or long streamers, which due to their fragile nature, in some of these views seem to be dissociated from any of the bacteria. Both the flagella and the pili are seen in a somewhat better mode in the colorized version of this image.