A 12-day-old girl was evaluated for a rash. The patient was born at 40 weeks’ gestation via normal spontaneous vaginal delivery to a woman of Vietnamese descent. No complications occurred during the pregnancy or delivery. She was discharged on the third day of life. She drank 90 mL of infant formula (Enfamil) every 3 hours, wet multiple diapers, and had no fussy behavior. She had no other significant illness, had no known drug allergies, and had received her hepatitis B vaccine at birth.
On admission, her vital signs were stable. Erythematous vesicles and pustules were diffusely distributed across the forehead, trunk, lower extremities, and vaginal area and near the eyes (
Figure). No lesions were noted in her eyes or mouth. The patient was sleeping, appeared comfortable, and was in no acute distress.

Figure.
What is your diagnosis?
For a discussion of last month's case, read the Picture of the
Month—Quiz Case.