Which finding would most strongly support a diagnosis of Pneumocystis jirovecii pneumonia (PCP) in a client with HIV?

Which finding would most strongly support a diagnosis of Pneumocystis jirovecii pneumonia (PCP) in a client with HIV?

• A. Hemoptysis
• B. Dyspnea
• C. CD4 count of 500 cells/mm3
• D. Fever

Answer: (D)

In PCP for someone with HIV, fever commonly accompanies the respiratory symptoms and is a hallmark feature of the infectious process. PCP typically presents with subacute fever, progressively worsening dyspnea, and a nonproductive cough, often with low blood oxygen levels and diffuse interstitial infiltrates on imaging. The given CD4 count of 500 cells/mm3 shows relatively preserved immunity and is not a risk factor for PCP, so it doesn’t support the diagnosis. Hemoptysis is not a typical finding in PCP, and while dyspnea can occur in many conditions, fever particularly aligns with the infectious pattern seen in PCP. So fever best supports PCP in this context.