A 22-year-old woman comes to the physician because of a 3-week history of fever and night sweats. She has lost 8 lbs (3.6 kg) during this time. Physical examination shows axillary and cervical lymphadenopathy bilaterally. Biopsy of a lymph node shows cells that stain negative for CD5 but positive for CD19 and CD20. What’s the most likely causal organism?
Bartonella henselae
Brucella melitensis
CMV
Coxiella burnetii
EBV
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Cut-to-the-chase Answer (0:41):
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HY USMLE Answer (11:46):
