A 32-year-old woman comes to the ED with a previous month long history of malaise, mild cough, and subjective fevers.
She is HIV positive and her last CD4 count taken 6 months prior was 220. She's not on antiretroviral therapy or other medications.
Vital signs: HR= 88 beats per minute, BP=130/60 mm Hg, RR = 12 breaths per minute, oxygen sat= 91% on room air.
Her chest radiograph shows diffuse, patchy infiltrates bilaterally. Subsequent labs are unremarkable except for an elevated lactate dehydrogenase level.
What most likely causing her condition?
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