What infection is caused by Group A Streptococcus and manifests with a rash?

Scarlet Fever is caused by Group A Streptococcus (Streptococcus pyogenes) and is characterized by a distinctive rash. The infection typically occurs after a strep throat or tonsillitis infection, often in children. The rash associated with Scarlet Fever is usually bright red, feels like sandpaper, and often begins on the neck and then spreads to the rest of the body. It may also be accompanied by other symptoms such as fever, sore throat, and a "strawberry tongue."

Rheumatic Fever is a complication of untreated streptococcal throat infections but is not associated with a rash that defines the primary infection. Impetigo, while also caused by Group A Streptococcus, primarily presents with skin sores rather than a widespread rash, and strep throat itself does not typically present with a rash; it features symptoms like sore throat and fever without the characteristic rash seen in Scarlet Fever. Thus, the choice of Scarlet Fever is accurate as it directly correlates with both the causative agent and the manifestation of a rash.