Pneumocystis jirovecii (Pneumocystis pneumonia)

Summary of Pneumocystis jirovecii (Pneumocystis pneumonia)
Pneumocystis jirovecii is a yeast-like fungus of the genus Pneumocystis. The causative organism of Pneumocystis pneumonia, it is an important human pathogen, particularly among immunocompromised hosts like those with AIDS. TMP-SMX, atovaquone, and pentamidine are used for both prophylaxis and treatment for this fungus, while dapsone is used only for prophylaxis.

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Pneumocystis jirovecii (Pneumocystis pneumonia)

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Pneumocystis jirovecii (Pneumocystis pneumonia)

36 flashcards
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Patients with , such as AIDS, are predisposed to disease by Pneumocystis jirovecii.

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A 25-year-old comes to the emergency department because of shortness of breath and fever for the past week. He also notes a persistent dry cough and recent unintentional weight loss. Physical examination shows mild tachypnea, and tachycardia to 110/min. Oxygen saturation is 94% on room air. A chest X-ray shows bilateral diffuse interstitial infiltrates without focal consolidation. Giemsa stain of induced sputum shows cysts in aggregate. Which of the following diagnostic tests is the next best step in the care of this patient?

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