Review Question - QID 213815

A 33-year-old man presents to the emergency department with fatigue, a sore throat, neck pain, vomiting, and diarrhea. The patient was treated with antibiotics 1 week ago for a sore throat. Since then, he states his symptoms have been worsening. He is now unable to care for himself and feels lightheaded and weak. His neck pain in particular has worsened. His temperature is 103.0°F (39.4°C), blood pressure is 104/64 mmHg, pulse is 130/min, respirations are 19/min, and oxygen saturation is 98% on room air. Physical exam is notable for tender lymphadenopathy on HEENT exam. The patient will not raise his neck secondary to discomfort. An ultrasound is performed of the internal jugular vein to place a central line as seen in Figure A. The patient is admitted to the hospital, and his blood cultures return positive. Which of the following organisms is the most likely etiology of this patient’s symptoms?