Which chest radiography findings suggest Klebsiella infection?

Updated: Jun 10, 2019
  • Author: Shahab Qureshi, MD, FACP; Chief Editor: Michael Stuart Bronze, MD  more...
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The organism usually involves one of the upper lobes; however, involvement of lower lobes is not uncommon.

The affected lobe typically appears swollen, producing the bulging fissure sign. This presentation is not necessarily exclusive to Klebsiella infection. Other organisms, such as H influenzae, may produce a similar radiographic appearance.

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