A 32-year-old woman with newly diagnosed HIV presents with dyspnea, fever (38.5°C), and nonproductive cough for 2 weeks. Vital signs show BP 110/68, HR 102, RR 24, SpO2 88% on room air. CD4 count is 85 cells/μL. Chest X-ray demonstrates bilateral interstitial infiltrates. Sputum induction reveals foamy, pale-staining organisms on Giemsa stain. She denies chest pain. She is not currently on antiretroviral therapy. Which organism is most likely responsible?
- A)Aspergillus fumigatus
- B)Coccidioides immitis
- C)Pneumocystis jiroveciiGABARITO
- D)Histoplasma capsulatum
- E)Cryptococcus neoformans
Explicação
Pneumocystis jirovecii causes PCP, the most common opportunistic infection in severely immunocompromised patients (CD4 <100). Bilateral interstitial infiltrates and foamy organisms on Giemsa stain are classic findings. PCR and immunofluorescence confirm diagno... Ver explicação completa e trilha adaptativa →