A man brings his 8-yr old son into the doctor’s office with a diffuse red rash that started on the boy’s chest then spread across his body. The father tells the doctor that the child was complaining of a sore throat shortly before the rash began. When the doctor examines him, he finds that the boy’s tongue is strawberry red. The doctor prescribes penicillin. What is the patient’s condition called and what is the likely causative agent?