A 72-year-old woman presents to the emergency department with cough, fever, and shortness of breath. The woman lives alone at home, but
spends part of each day shopping and riding public buses. Approximately 4 days previously she had developed an upper respiratory infection.
Approximately 2 days ago, she abruptly became much more ilI, and her symptoms started worsening, beginning with a single, Iong, shaking
chilI. Since that time, she has had fever, pain with breathing, cough, and dyspnea. She decided to come to the emergency department when
her temperature at home was 103.4 F. In the emergency department, her temperature is 39.9 C (103.8 F), blood pressure is 90/50 mm Hg,
pulse is 120/min, and respirations are 30/min. No breath sounds are heard over her lower left lung field, but they can be heard at other sites.

Gram's stain of a smear from a sputum sample demonstrates gram-positive lancet-shaped diplococci in short chains. Which of the following would most likely be identified after culturing?