A 10-day course of dicloxacillin for folliculitis

[Mohamed.]

A 47-year-old woman comes to the physician because of a 2-day history of fever and joint pain. Six days ago, she completed a 10-day course of dicloxacillin for folliculitis. She appears comfortable. Her temperature is 38.6°C (101.5°E), pulse is 721min and regular, respirations are 161min, and blood pressure is 120176 mm Hg. Examination shows an urticarial rash over the trunk and extremities. There is moderate generalized lymphadenopathy and diffuse joint tenderness. The remainder of the examination shows no abnormalities. Which of the following is the most likely cause of these symptoms?

- Epstein-Barr virus infection
- IgE-mediated allergic reaction
- Mycobacterium haemophilum infection
- Serum sickness
- Staphylococcal sepsis

why do you think this is the answer?

[serendipiddy]

Is that the right answer? I thought it was EBV infection?