A 39-year-old man comes to the physician for a 2-day history of high fever and chills. Physical examination shows a 2/6 holosystolic murmur at the left mid-clavicular line. There is no radiation to the axilla. He has smoked one-half pack of cigarettes daily for the past 20 years. He drinks a pint of whisky daily. He is enrolled in a methadone program. Blood cultures are drawn and shown below. Which of the following is most likely reflective of the causal organism?
Endotoxin
Lipid A
Lipopolysaccharide
M-protein
SpA
