BACKGROUND
A 33-year-old man with HIV presents to the hospital with a fever, a cough, and shortness of breath that has lasted for 3 days.
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Hint
The patient is not compliant with his medications. Blood gas measurements reveal a dissolved oxygen level of 64 mm Hg and a lactate dehydrogenase (LDH) value of 475 U/L.
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Author:
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Michael Cetta, MD
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Department of Emergency Medicine, Washington Hospital Center
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