Review Question - QID 108466

An infant is born via spontaneous vaginal delivery to a G1P0 mother without any complications. The pregnancy was notable only for limited prenatal care. Maternal Streptococcus agalactiae serology was unknown at the time of delivery. The mother's past medical history is notable only for cocaine and IV drug use; however, the patient denies any illicit substances for over a year. During delivery, there was a prolonged second stage of labor complicated by uterine atony, which was managed with bimanual massage, IV fluids, and oxytocin in a rural hospital. On day 4 of life, the newborn presents with a thick bilateral mucopurulent discharge from her eyes. She is crying and inconsolable. Her temperature is 99°F (37.2°C), blood pressure is 65/40 mmHg, pulse is 128/min, and respirations are 33/min. Which of the following is the most appropriate next step in management for this patient?