ID#: 11097
Caption:
Magnified 8000X, this digitally colorized scanning electron microscopic (SEM) image depicts a group of Legionella pneumophila bacteria. Some bacteria seemed to display an elongated-rod morphology. L. pneumophila frequently exhibit this configuration when grown in broth. They can also elongate when plate-grown cells age, as it was in this case, especially when they’ve been refrigerated. The usual L. pneumophila morphology consists of stout, fat bacilli, which is the case for the vast majority of the organisms depicted here. These bacteria originated on a 1 week-old culture plate (+/- 1 day), which had incubated a single colony, at 37oC on a buffered charcoal yeast extract (BCYE) medium with no antibiotics. The original sample had been acid-treated for 15 min, to knock back the bacterial and fungal impurities, which would have inhibited the visualization of these organisms.
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.