ID#: 11144
Caption:
Magnified 6500X, this digitally colorized scanning electron microscopic (SEM) image depicted a number of Legionella pneumophila bacteria. Note the presence of polar flagella, and pili, or long streamers, which due to their fragile nature, at times seem to be dissociated from any of the bacteria. A number of these bacteria seem to display an elongated-rod morphology, and are known to exhibit this configuration when grown in broth. They can also elongate when plate-grown cells age, as it was in this case, especially when refrigerated. The usual L. pneumophila morphology consists of stout, fat bacilli, which was the case for the majority of these organisms, which originated on a 1 week-old culture plate (+/- 1 day), which had incubated a single colony, at 37oC upon a buffered charcoal yeast extract (BCYE) medium with no antibiotics.
High Resolution: Click here for hi-resolution image (16.42 MB)
Content Provider(s): CDC/ Margaret Williams, PhD; Claressa Lucas, PhD;Tatiana Travis, BS
Creation Date: 2009
Photo Credit: Janice Haney Carr
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Copyright Restrictions: None - This image is in the public domain and thus free of any copyright restrictions.