A 54-year-old female patient is seen during morning rounds on the inpatient medical ward following 48 hours of treatment. She was initially admitted for a high fever, productive cough, and right-sided pleuritic chest discomfort. At the time of admission, a chest radiograph demonstrated a dense consolidation in the right lower lobe, prompting empiric therapy with intravenous ceftriaxone and oral azithromycin. Her past medical history is notable for chronic obstructive pulmonary disease.
This morning, the patient reports significant symptomatic improvement and is tolerating an oral diet. Vital signs demonstrate a temperature of 37.1°C (98.8°F), blood pressure of 124/80 mmHg, heart rate of 76/min, and a respiratory rate of 16/min with an oxygen saturation of 98% on room air. Pulmonary auscultation reveals decreased breath sounds at the right lung base but no wheezing or rhonchi.
The hospital laboratory reports that the sputum culture collected upon admission has grown *Streptococcus pneumoniae*. The antimicrobial susceptibility profile is as follows:
| Antimicrobial | Interpretation |
|---|---|
| Penicillin | Susceptible |
| Amoxicillin | Susceptible |
| Ceftriaxone | Susceptible |
| Levofloxacin | Susceptible |
| Vancomycin | Susceptible |
| Azithromycin | Resistant |
Which of the following is the most appropriate next step in this patient's pharmacologic management?
- Transition to oral amoxicillinAnswer
- BTransition to oral levofloxacin
- CTransition to oral amoxicillin-clavulanate
- DContinue intravenous ceftriaxone to complete a 7-day course
- ETransition to oral azithromycin and initiate systemic corticosteroids