ID#: 11148
Magnified 5000X, this digitally colorized scanning electron microscopic (SEM) image depicted a large grouping of Legionella pneumophila bacteria. Note the presence of an elongated-rod morphology in some organisms, seen in other images from this series as well. L. pneumophila frequently elongate when grown in broth, when plate-grown cells age, or when refrigerated, as in this case. Usually, L. pneumophila are stout, fat bacilli, which was the morphology displayed by the majority of these organisms. These bacteria originated on a 1 week-old culture plate (+/- 1 day), forming a single colony, at 37oC, on a buffered charcoal yeast extract (BCYE) medium with no antibiotics. The original sample was acid-treated for 15 min, to minimize fungal impurities, which would have inhibited the visualization of these organisms.
High Resolution: Click here for hi-resolution image (16.43 MB)
Content Provider(s): CDC/ Margaret Williams, PhD; Claressa Lucas, PhD; Tatiana Travis, BS
Creation Date: 2009
Photo Credit: Janice Haney Carr
CDC Organization
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Copyright Restrictions: None - This image is in the public domain and thus free of any copyright restrictions.