A 12-year-old girl is brought to the physician by her mother for a two-day history of productive cough and fever. Two weeks ago, she recovered from a very bad cold with associated muscle aches. A gram stain of the patient’s sputum is shown below.
Which of the following is most likely characteristic of the causal organism?
Growth in 6.5% NaCl
Production of coagulase
Production of green zone on blood agar
Sensitivity to bacitracin
Sensitivity to optochin
