What is the role of WBC count in the evaluation of nosocomial pneumonia?

Updated: Apr 15, 2021
  • Author: Kartika Shetty, MD, FACP; Chief Editor: John L Brusch, MD, FACP  more...
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Answer

Answer

The WBC count may be normal or elevated in nosocomial pneumonia or disorders that mimic nosocomial pneumonia/ventilator-associated pneumonia (VAP). A left shift reflects the stress and neither rules out nor confirms infection. The degree of left shift indicates the degree of stress in the host. Neither leukocytosis nor leukopenia count favors the diagnosis of nosocomial pneumonia over the diseases that mimic nosocomial pneumonia, as these can produce similar changes.


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