Review Question - QID 109936

A 7-year-old girl presents to her pediatrician's office with her mother for a headache and sore throat. She reports her symptoms began a few days prior to presentation and are accompanied by a fever of 101°F (38.3°C), mild abdominal pain, cough, and poor oral intake. There is no history of hoarseness, conjunctivitis, or coryza. Medical history is significant for a severe penicillin allergy. The patient's temperature is 100°F (37.8°C), blood pressure is 95/70 mmHg, pulse is 90/min, respirations are 14/min, and oxygen saturation is 99% on room air. On physical exam, she has enlarged and tender anterior cervical lymph nodes. She also has enlarged and erythematous tonsils with exudates as shown in Figure A. Which of the following is the best next step in management?