Fast Five Quiz: Pneumonia Key Aspects

Michael Stuart Bronze, MD


March 23, 2020

According to IDSA/ATS guidelines, at least one major criterion or three minor criteria define the presence of severe CAP. Minor criteria include the following:

  • Respiratory rate ≥ 30 breaths/minute

  • PaO2/FiO2 ratio ≤ 250

  • Multilobar infiltrates

  • Confusion/disorientation

  • Uremia (BUN level ≥ 20 mg/dL)

  • Leukopenia (white blood cell count < 4000 cells/μL)

  • Thrombocytopenia (platelet count < 100,000/μL)

  • Hypothermia (core temperature < 36°C)

  • Hypotension requiring aggressive fluid resuscitation

Major criteria include septic shock with the need for vasopressors and respiratory failure requiring mechanical ventilation.

Read more about pneumonia severity.


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