IDSA/ATS 2007 Criteria for Severe Community-Acquired Pneumonia Calculator

Major criteria
Minor criteria


Major Criteria:

Minor Criteria:

ICU Indication:

Community-Acquired Pneumonia

Community-acquired pneumonia is a lung infection that develops in people outside of a hospital.

Many viruses, bacteria and fungi can cause pneumonia.

The most common symptom of pneumonia is a productive cough, but chest pain, chills, fever, and shortness of breath are also common symptoms.

The doctor diagnoses community-acquired pneumonia by auscultating the lungs with a stethoscope and reading an x-ray or computed tomography (CT) scan of the chest.

Antiviral or antifungal drugs are used, depending on which microorganism doctors suspect is causing the pneumonia.

IDSA/ATS 2007 Criteria for Severe Community-Acquired Pneumonia Calculator

In order to help guide acute community-acquired pneumonia in emergency departments, IDSA and ATS proposed in 2007 to define severe pneumonia by the presence of a major criterion (mechanical ventilation or vasopressors) or by the presence of 3 minor criteria from a list of 9 clinical-radiobiological signs. These criteria are confirmed by a study in 2009.