Which lab findings indicate severe cases of Legionnaires disease?

Updated: Aug 24, 2018
  • Author: Burke A Cunha, MD; Chief Editor: Michael Stuart Bronze, MD  more...
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Answer

Severe disease is defined by respiratory failure, bilateral pneumonia, rapidly worsening pulmonary infiltrates, or the presence of at least 2 of the following 3 characteristics:

  • Blood urea nitrogen (BUN) greater than or equal to 30 mg/dL

  • Diastolic blood pressure lower than 60 mm Hg

  • Respiratory rate greater than 30/min


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