A 10-Year-Old Boy Is Brought to the Emergency Department After

A 10-year-old boy is brought to the emergency department after experiencing high fevers and chills for the last few days.  He also complains of dull pain just above his left knee.  He has no history of recent trauma other than minor scrapes to his knees and elbows while playing outside.  Physical examination shows point tenderness 3 cm above the kneecap.  There is no joint effusion.  Radiographs show soft-tissue swelling and a periosteal reaction over the lower end of the femur.  Which of the following organisms is most likely responsible for this patient's symptoms?

A) Enterococcus faecalis
B) Moraxella catarrhalis
C) Staphylococcus aureus
D) Staphylococcus epidermidis
E) Streptococcus agalactiae
F) Streptococcus pneumoniae
G) Streptococcus pyogenes

Correct Answer:

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