Pneumocystis jirovecii pneumonia

Grading of severity[32]National Institutes of Health, Centers for Disease Control and Prevention, HIV Medicine Association, and Infectious Diseases Society of America. Panel on Guidelines for the Prevention and Treatment of Opportunistic Infections in Adults and Adolescents with HIV. Guidelines for the prevention and treatment of opportunistic infections in adults and adolescents with HIV. Pneumocystis pneumonia. Sep 2024 [internet publication]. https://clinicalinfo.hiv.gov/en/guidelines/adult-and-adolescent-opportunistic-infection/pneumocystis-pneumonia  

In adults and children, the severity of Pneumocystis pneumonia (PCP) may be graded as:

• Mild-to-moderate PCP: arterial blood gas room air pO₂ ≥70 mmHg or an alveolar-arterial (A-a) gradient ≤35 mmHg.

• Moderate-to-severe PCP: arterial blood gas room air pO₂ <70 mmHg or an alveolar-arterial (A-a) gradient >35 mmHg.