Review Question - QID 109338

A 5-day-old male presents with his mother to his pediatrician with a rash. His mother reports that over the last 24 hours the patient has developed a “blotchy rash” over his chest and back. The patient was born at 39 weeks gestation to a 32-year-old primigravid mother via vaginal delivery. The patient’s mother has a known history of herpes simplex type 2 (HSV-2) but had no active lesions at the time of delivery. The patient’s mother received routine prenatal care and the patient’s postnatal course was uncomplicated. Both mother and child were discharged from the hospital on day 2 of life. The patient has been breastfed since birth, and his mother reports that the patient feeds about every 2 hours. The patient’s birth weight was 4120 g (9 lb 1 oz), and his current weight is 3918 g (8 lb 10 oz). His temperature is 97.7°F (36.5°C), blood pressure is 65/46 mmHg, pulse is 145/min, and respirations are 32/min. On physical exam, the patient is well-appearing and easily soothed. His eyes are mildly icteric. The patient’s rash extends over his torso and thighs and can be seen in Figure A. Which of the following is the most appropriate next step in management?