Hand-Foot-Mouth Disease — Coxsackie

A 3-year-old child presents to the pediatric clinic with a 2-day history of low-grade fever, malaise, and refusal to eat. On examination, you note painful erosions on the tongue and buccal mucosa. The structure marked **A** in the diagram shows oval vesicles on the palms and soles. Which of the following is the most likely causative agent and the most appropriate immediate management?