Review Question - QID 4492

A 45-year-old patient presents with pain and swelling after undergoing an arthroscopic rotator cuff repair 10 weeks ago. On physical exam the portal sites are healed and there is no drainage. Testing of the integrity of the rotator cuff is limited secondary to pain. He has a WBC of 11.0 (reference range, 3-11 cells/mL), ESR of 40 mm/hr (reference range, 0-22 mm/hr), and CRP of 1.5 mg/dL (reference range, 0-1 mg/dL). An aspiration is completed and no organisms are seen on the gram stain. Twelve days after the aspiration, positive cultures are reported. Which organism is most likely to have grown in culture medium?