A child presents with a rash that is diffusely erythematous, with superimposed fine red papules, and is most pronounced in the groin and axilla. His face is notably flushed and he has strawberry tongue (enlarged red papillae coating the tongue). Prior to the rash, he had a sore throat. What is your presumed diagnosis?
Answer: Scarlet fever caused by erythrogenic toxin of S. pyogenes