Review Question - QID 109041

A 4-day-old girl is brought in by her mother for bilateral purulent eye discharge. Pregnancy and delivery were uncomplicated. The newborn had been sleeping regularly and feeding well. Then 1 day ago, the patient developed eyelid edema and eye redness. This morning, the newborn developed a thick yellow-white eye discharge. The mother denies that anyone in the house smokes. The family has a cat at home. The patient’s rectal temperature is 99°F (37.2°C), blood pressure is 80/50 mmHg, pulse is 134/min, and respirations are 34/min with an oxygen saturation of 98% O2 on room air. Figure A shows a photograph of one of the patient's eyes. The patient's physical exam is otherwise unrevealing. Which of the following most appropriately would have prevented this infant's condition?